成都嘉祥外国语学校2019- 2020学年八年级下期Unit7测试题(无听力,有答案)

2020年嘉祥外国语八年级上Unit7试题第二部分基础知识运用(共30小题;计40分)六、选择填空(共15 小题;计20分)A.从以下各题的A、B. C三个选项中选择正确答案。

(共10小题;每小题1分,计10分)31.Nick lives in____apartment across_____street from here.A a;the B. an;a C. an;the32.--The Lion King is____the best cartoon for English beginners.--Yes,I agree with you.A.possibleB.probablyC.seriously33.--_____will your brother come back?--Maybe in two days.A. How oftenB. How longC. How soon34.In the future,people will speak______languages Maybe there will be____one language.A.less;onlyB.more;stillC. fewer;only35. Now water______is very serious.Some rivers and lakes are_____.A. pollution;pollutedB. polluted;pollutionC. polluting,pollution36.There_____two class meetings next week.A. is going to beB. are going to beC. are going to have37. People think tigers are ______animals. In fact, they are in great_____because of human activities.A. endanger;dangerousB.dangerous;dangerC.danger;dangerous38.It's true that there is_____pollution on the earth,but people are trying to_____the environmentA. more; plantB. less;saveC. much;improve39. --Robots are getting smarter and smarter now. Maybe they will fight with human beings.--______.A. I'd love toB. I hope notC. I don't know40. Nobody knows_______.A. what will the future be likeB. what is the future likeC. what the future will be likeB.补全对话根据对话内容从右边方框中选出适当的选项补全对话。

外研版八年级下册Module7单元测试（满分100）一、单项选择(每小题1分，共15分)1．—Mum, look! My trousers ________ too short.Can you buy me a new ________？—OK.A．is; one B．are; onesC．are; pair D．is; pair2．—The sun is shining brightly.—Why not wear a pair of ________ to protect your eyes?A．shoes B．pantsC．sunglasses D．hats3．You should make a ________ of the key points he tells you.A．test B．list C．book D．paper4．When you get into trouble, will you keep trying ________ give up?A．or B．and C．but D．so5．He couldn't remember the spelling of the word, so he had to________ the blank with a wrong word.A．fill out B．take offC．pick up D．check in6．The lady looks pretty.________，do you know her?A．In the way B．On the wayC．To the way D．By the way7．—This pair of sunglasses________nice. How much?—Well，fifty yuan________enough.A．are；is B．is；is C．are；are D．is；are8．Zhang Yu has made great ________ in his English after a year's hard work.A．progress B．mistake C．experience D．pity9．You'd better ________ that again.A．do not B．not doC．not to do D．to not do10．—Mum, shall we go to the beach tomorrow?—It________the weather.A．carries on B．lives onC．depends on D．holds on11．It's easy to put on________ if you eat food with________fat in it.A．weigh；too much B．weight; too muchC．weigh; much too D．weight; much too12. Some people think it's the parents' job to ________ their children ________aclean and comfortable environment at home.A．offer; to B．offer; withC．provide; with D．provide; to13．—What would you like to do to relax yourself?—I prefer ________ basketball rather than ________________ magazines.A．playing ; reading B．to play; to readC．play; read D．to play; read14．—How long do you think the terrible weather will ________？—Why not listen to the weather report?A．appear B．lastC．change D．discover15．—Goodbye, Linda.________．—Bye, Mike! I'll write to you.A．Keep fit B．With pleasureC．Sounds great D．Stay in touch二、完形填空(每小题1分，共10分)Dear Laura,Thanks for your email. Yes, I am having a great time on my exchange programme in France. It's even ________16than I thought. I was a little nervous before I arrived here, ________17there was no reason to be worried. My host ________18is really nice. They try their best to make me feel at home. And you wouldn't believe how ________19 my French has improved! Although I still make lots of mistakes, it doesn't bother (使……烦恼) me as before. My biggest challenge (挑战) is learning how to ________20at the dinner table. As you can imagine, things are really different ________21those at home. For example, you should not eat ________22with your hands except bread, not even fruit. ________23 thing is that it is very rude to say you are full. If you don't want any more food, you should just say “ ________24”. Also, it's rude to put your hands in your lap. I find ________25 difficult to remember everything, but I am getting used to them.Hope you are having a good school year. Please write to me soon.Yours,Wang Kun16. A. worse B. better C. sadder D. lazier17. A. and B. then C. but D. so18. A. school B. classroom C. house D. family19. A. fast B. slow C. good D. many20. A. eat B. drink C. talk D. behave21. A. between B. from C. to D. as22. A. something B. everything C. anything D. nothing23. A. One B. The other C. Another D. Other24. A. I'm not hungry B. I'm full nowC. I don't want anythingD. It was delicious25. A. it B. that C. this D. its三、阅读理解(每小题2分，共40分)AThe summer vacation is a time to enjoy a change from the school year. It's a good chance to work on different activities that you don't have much time to do during the rest of the year.We asked about 2，000 people what they would do during the summer vacation. Most of the survey-takers agreed that the summer vacation was a break from homework and they could relax.Alexis said, “At school, I'm really tired, so during the summer vacation I can read books and do many outdoor activities.”Amy is in high school. After school, she sometimes works in a cafe. She told us, “It's a chance to relax after a hard school year —sleep more，and see my friends more.”We also asked them if they would be too busy or kind of bored. About half (52%) of the survey-takers said they would be busy during the summer vacation but still have time to relax. And that is exactly how it should be.But not everyone said their summer vacation would be the right balance (平衡) between being busy and relaxing. Many thought that they would be too bored.How bored or busy people feel during the summer vacation depends on how old they are. Survey-takers in their early teens were more likely (可能的) to be bored. Among them, 40% said they would be bored and only 10% thought they would be too busy.26. What does the underlined word “survey-takers” in Paragraph 2 mean?A．进行调查的人B．接受调查的人C．写调查报告的人D．看调查报告的人27. What does Amy want to do during the summer vacation?A．To do a part-time job.B．To do some outdoor activities.C．To help her parents do housework.D．To sleep more and visit friends more.28. The underlined word “that” in Paragraph 5 refers to________．A．feeling boredB．being very busyC．spending all the time enjoying oneselfD．having time to relax though being busy29. How bored or busy people feel during the summer vacation depends on________ .A．their age B．their parentsC．where they live D．what they are30. According to the passage, those who took part in the survey are most probably________．A．scientists B．doctorsC．students D．teachersBMillions of children in the United States go to summer camps.Some go to play outdoors at traditional camps in the woods, in the mountains or on lakes.But families now have many choices of special camps.These can be in the middle of nature or a big city.Special camps offer young people the chance to learn about different subjects：space exploration，business and medicine.In technology camps, one subject that children can learn about is video game design.They learn how to use computer programs to create games of their own.One program that teaches video game design is called Cyber camps.Children can learn how to design their own virtual(虚拟的) worlds to set their video games in.Then, they program their own rules and objects into the game.Cyber camps can also offer courses in robot building and web design.A recent story in the Washington Post described how one child made a robot that could sing a song.Another one made a robot that could follow a black line drawn on a piece ofcardboard.Also, children can learn how to make websites.One child made a site for Pokemon, one of his favourite cartoon shows.31．Traditional camps are ________.A．in the woods B．in the mountainsC．on lakes D．All of the above.32．Special camps offer young people the chance to learn ________.A．space only B．science onlyC．medicine only D．different subjects33．In Cyber camps a child made a robot that could________.A．sing B．dance C．speak D．draw34．Which one is NOT true according to the passage?A．There are many special camps in the USA now.B．Families prefer traditional camps to special camps.C．Special camps can be in the middle of nature or a big city.D．In technology camps, children can create games of their own.35．The best title for the passage is ________.A．Traditional Camps B．Special CampsC．Summer Camps D．Summer HolidayCWhile Mr Wan, his wife and their little daughter were in Europe, they decided to drive three days to Germany.His little daughter had never traveled at night before.She was scared the first night in the car, with the deep darkness outside.“Where are we going, Daddy？” “To your uncle's house in Germany.”“Have you been to his house before? ” “No.”“Do you know the way？” “Kind__of,__we will read the map.”“Do you know how to read the map？” “Yes, we will get there safely.”“Where are we going to eat if we get hungry before arriving？” “We can stop at a restaurant if we get hungry.”“Do you know i f there are restaurants on the way？” “Yes, there are.”“Do you know where？” “No, but we will be able to find some.”The same dialogue repeated a few times during the first night and second night.But on the third night, his daughter was quiet.He couldn't help wondering why she was not asking the questions anymore.“Dear, do you know where we are going？” “Germany, to Uncle's house.”“Do you know how we are getting there？” “No.”“Then why aren't you asking me anymore？” “Because Daddy is driving.”Because Daddy is driving.That answer from his little girl gave Mr Wan strength (力量)for many years after, whenever he had questions and fears (恐惧)about his life journey.36．From the passage, we know that the family is ________ now.A．traveling in Europe B．driving in GermanyC．going to Germany D．having a nice holiday37．The little girl asked so many questions during the first night because ________.A．she was afraid of the deep darknessB．she didn't want to go to GermanyC．she didn't believe in her parentsD．she was very hungry on the road38．What does the underlined phrase “kind of” suggest?A．Mr Wan didn't know the way at all.B．Mr Wan could read the map very well.C．Mr Wan was not quite sure about the way.D．Mr Wan was familiar with the way.39．Why didn't the girl ask questions on the third night?A．Because Daddy helped the girl with her problem.B．Because the girl chose to believe in her father.C．Because the girl knew all of the answers.D．Because Daddy answered all of the girl's questions.40．What gave Mr Wan more strength after this trip?A．His daughter's questions.B．His daughter's trust.C．His good driving skill.D．His strong will about life.DChoose the best topic from A to F according to the meaning of each paragraph.41．Every year，thousands of students choose to study in another country for a term, or a year.Studying abroad can be an exciting experience for manypeople.42.Living in another country can help you learn a language, and learn aboutanother culture.You will see the world in a new way, and learn more about yourself.The experience of studying abroad may also look good on your future resume (求职简历)．Many companies today want people who speak a second language, or have experience in living or working in another country.43.Once you decide to study abroad, you have to make choices.To choose the rightcountry or school, ask yourself: Where do I want to go and why? How much do I want to pay? How long do I want to study abroad? Do I want to live with roommates, alone or somewhere else?44.Get your passport and visa (签证) early! Before you go, learn some of the languages, and read about some common customs (习俗) in the country that you are going to.Learn about the money.Bring some of it with you.45．After the first few weeks abroad, many students will feel a little homesick (想家)．They may miss their family, friends, and familiar ways of doingthings.Remember that it takes time to get used to a new place, school, and culture.When you feel sad or homesick, try to talk to others, or write about your feelings in a notebook.A．Once you are in another countryB．Why study in another countryC．So many students choose to study abroadD．Making right choicesE．How to get a passport and visaF．Getting ready四、词汇运用(每小题1分，共10分)A)根据句意及汉语提示完成句子46. There are a lot of ________ (客人) in my room.47. You can make a ________(清单)before shopping.48. Now many western people like Chinese________(文化) very much.49. Wearing sports shoes and ________(短裤) is good for you to climb the mountain.50. Do you know how to ________(称……的重量) elephants?B)根据汉语完成句子51. 王琳能否做这项工作取决于她的能力。

2019-2020学年四川省成都七中嘉祥外国语学校八年级（下）期中数学试卷一、选择题（本大题共10小题，每小题3分，共30分.在每小题给出的四个选项中，只有一项是符合题目要求的）1．下列图形中，可以看作是中心对称图形的是（）A．B．C．D．2．下列等式，从左到右的变形是因式分解的是（）A．2x（x+3）＝2x2+6x B．24xy2＝3x•8y2C．x2+2xy+y2+1＝（x+y）2+1D．x2﹣y2＝（x+y）（x﹣y）3．下列计算正确的是（）A．＝B．（）﹣3＝﹣C．+＝a﹣1D．3x2y+＝x54．下面给出的条件中，不能判定四边形ABCD是平行四边形的是（）A．AB＝CD，AD＝BC B．AD∥BC，∠A＝∠BC．AD∥BC，∠A＝∠C D．AD∥BC，AB∥CD5．已知a＜b，下列式子不成立的是（）A．a+1＜b+1B．3a＜3bC．﹣a＞﹣b D．如果c＜0，那么＜6．如图，在△ABC中，D是AB上一点，AD＝AC，AE⊥CD，垂足为点E，F是BC的中点，若BD＝10，则EF的长为（）A．8B．10C．5D．47．如图，在已知的△ABC中，按以下步骤作图：①分别以B，C为圆心，以大于BC为半径画弧，两弧相交于两点M、N；②连接M，N交AB于点D，连接CD；若CD＝AC，∠A＝48°，则∠ACB的度数为（）A．90°B．96°C．108°D．112°8．疫情期间嘉祥外国语学校用4200元钱到商场去购买“84”消毒液，经过协商议价，每瓶便宜1元，结果比用原价多买了140瓶，求原价每瓶多少元？若设原价每瓶x元，则可列出方程为（）A．﹣＝140B．﹣＝140C．﹣＝1D．﹣＝19．对于两个不相等的实数a、b，我们规定符号min{a，b}表示a、b中的较小的值，如min{2，4}＝2，按照这个规定，方程min{，}＝﹣2的解为（）A．B．2C．或2D．1或﹣210．当3≤5﹣3x＜9时，不等式组的非负整数解为（）A．3B．2C．1D．0二.填空题（本大题共4小题，每小题4分，共16分，把答案填在题中横线上）11．分解因式：2x2﹣4x＝．12．如果方程+1＝有增根，那么m＝．13．如图△ABC中，点D为BC的中点，AB＝13，AC＝5，AD＝6，则△ABC的面积是．14．如图，在Rt△ABC中，∠C＝90°，∠D＝60°，点D在BC边上，CD＝3，将△ABC沿直线AD翻折，使点C落在AB边上的点E处，若点P是直线AD上的动点，则△PBE的周长的最小值是．三、解答题（本大题共6小题，解答应写出文字说明，证明过程或演算步骤，共54分）15．（1）解方程：+1＝．（2）解不等式组：，并把解集表示在数轴上．16．先化简，再求值：（﹣a+1）÷+﹣a，并从﹣1，0，2中选取一个恰当的数作为a 的值代入求值．17．如图，△ABC三个顶点的坐标分别是A（﹣4，1），B（﹣1，3），C（﹣2，0），将△ABC平移得到△DEF，使点A与点D（1，﹣2）是对应点．（1）在图中画出△DEF，写出点B、C的对应点E、F的坐标；（2）若点P在x轴上，且△PCD的面积等于△ABC面积的，请求出满足条件的点P的坐标．18．在▱ABCD中，点E为AB边的中点，连接CE，将△BCE沿着CE翻折，点B落在点G处，连接AG 并延长，交CD于F．（1）求证：四边形AECF是平行四边形；（2）若CF＝5，△GCE的周长为20，求四边形ABCF的周长．19．在△ABC中，AB＝AC，D为AB上一点，E为CD的中点．（1）如图1，连接AE，作EH⊥AC，若AD＝2BD，S△BCD＝6，EH＝2，求AB的长；（2）如图2，F为腰AC上一点，连接BE，BF．若∠BAC＝∠ABE＝∠CBF，求证：BD+CF＝AB．20．阅读材料：我们已经学习了《二次根式》和《乘法公式》，可以发现：当a＞0，b＞0时，有（﹣）2＝a﹣2+b≥0，∴a+b≥2，当且仅当a＝b时取等号．请利用上述结论解决以下问题：（1）当x＞0时，x+的最小值为；当x＜0时，x+的最大值为．（2）当x＞0时，求y＝的最小值．（3）如图，四边形ABCD的对角线AC，BD相交于点O，△AOB、△COD的面积分别为9和16，求四边形ABCD面积的最小值．四、填空题（本大题共5小题，每小题4分，把答案填在题中横线上）21．如果x+＝2，则的值等于．22．已知x4﹣5x3+nx﹣16有因式（x﹣1），则n＝．23．如图，将一张长方形纸板按图中虚线裁剪成九块，其中有两块是边长都为m的大正方形，两块是边长都为n的小正方形，五块是长为m，宽为n的全等小长方形，且m＞n（以上长度单位：cm）．（1）观察图形，可以发现代数式2m2+5mn+2n2可以因式分解为；（2）若每块小长方形的面积为8cm2，四个正方形的面积和为66cm2，则图中所有裁剪线（虚线部分）长之和．24．关于x的不等式组的解集中每一个值均不在﹣3≤x≤4的范围中，则实数a的取值范围是．25．在△ABC中，AB＝6，AC＝BC＝5．将△ABC绕点A按顺时针方向旋转，得到△ADE，旋转角为α（0°＜α＜180°），点B的对应点为点D，点C的对应点为点E，连接BD，BE．如图，当α＝60°时，延长BE交AD于点F：①△ABD是等边三角形；②BF⊥AD；③AF＝EF；④BE＝3﹣4．其中所有正确的序号是．五、解答题（本大题共3小题.每小题10分）26．某企业在甲地一工厂（简称甲厂）生产某产品，2017年的年产量过百万，2018年甲厂经过技术改造，日均生产的该产品数是该厂2017年的2倍还多2件．（1）若甲厂2018年生产200件该产品所需的时间与2017年生产98件该产品所需的时间相同，则2017年甲厂日均生产该产品多少件？（2）由于该产品深受顾客喜欢，2019年该企业在乙地建立新厂（简称乙厂）生产该产品，乙厂的日均生产的该产品数是甲厂2017年的3倍还要多5件，同年该企业要求甲、乙两厂分别生产m，n件产品（甲厂的日均产量与2018年相同），m：n＝12：17，若甲、乙两厂同时开始生产，谁先完成任务？请说明理由．27．在平面直角坐标系xOy中，点A（a，6），B（4，b），若a，b满足（a+b﹣5）2+|2a﹣b﹣1|＝0．（1）①求点A，B的坐标；②点D在第一象限，且点D在直线AB上，作DC⊥x轴于点C，延长DC到P使得PC＝DC，若△P AB的面积为10，求P点的坐标；（2）如图，将线段AB平移到CD，点C在x轴负半轴上，点D在y轴负半轴上，连接AC交y轴于点E，连接BD交x轴于点F，点M在DC延长线上，连EM，3∠MEC+∠CEO＝180°，点N在AB延长线上，点G在OF延长线上，∠NFG＝2∠NFB，试探究∠EMC和∠BNF的数量关系，说明理由．28．已知ABCD是平行四边形．（1）若AB＝5，AD＝2，∠DAD＝45°，画出▱ABCD；（2）证明：AB2+AD2＝（AC2+BD2）；（3）若相邻两边AB、AD满足AD≤AB，想在▱ABCD中截一个直角三角形，并且希望以AB为斜边，直角顶点在CD上，问此想法是否可行？如果可行的话，请说明应该怎样截；如果不行，请说明理由．参考答案一、选择题（本大题共10小题，每小题3分，共30分.在每小题给出的四个选项中，只有一项是符合题目要求的）1．A；2．A；3．A；4．A；5．A；6．A；7．A；8．A；9．A；10．A；二.填空题（本大题共4小题，每小题4分，共16分，把答案填在题中横线上）11．；12．；13．；14．；三、解答题（本大题共6小题，解答应写出文字说明，证明过程或演算步骤，共54分）15．；16．；17．；18．；19．；20．；；四、填空题（本大题共5小题，每小题4分，把答案填在题中横线上）21．；22．；23．；；24．；25．；五、解答题（本大题共3小题.每小题10分）26．；27．；28．；。

2019-2020学年四川省成都七中嘉祥外国语学校八年级（上）期中数学试卷一、选择题（共10小题，每小题4分，满分40分）1．（4分）（2009秋•姜堰区期中）在数中，有理数的个数为（）A．3B．4C．5D．62．（4分）（2019秋•锦江区校级期中）下列说法错误的是（）A．的平方根是±B．﹣9是81的一个平方根C．的算术平方根是4D．＝﹣33．（4分）（2019秋•江阴市期中）三角形的三边分别为a、b、c，由下列条件不能判断它是直角三角形的是（）A．B．a2﹣b2＝c2C．a2＝（b+c）（b﹣c）D．a：b：c＝13：5：124．（4分）（2016春•五莲县期末）若a，b为实数，且|a﹣3|+（b+2）2＝0，点P（﹣a，﹣b）的坐标是（）A．（﹣2，3）B．（2，﹣3）C．（﹣3，2）D．（﹣3，﹣2）5．（4分）（2018秋•三明期末）在平面直角坐标系中，点M在第四象限，到x轴，y轴的距离分别为6，4，则点M的坐标为（）A．（4，﹣6）B．（﹣4，6）C．（﹣6，4）D．（﹣6，﹣4）6．（4分）（2019秋•濉溪县期末）一次函数y＝（2m﹣10）x+2m﹣8的图象不经过第三象限，则m的取值范围是（）A．m＜5B．m＞4C．4≤m＜5D．4＜m＜57．（4分）（2017•泰安模拟）早餐店里，李明妈妈买了5个馒头，3个包子，老板少要1元，只要10元；王红爸爸买了8个馒头，6个包子，老板九折优惠，只要18元．若馒头每个x元，包子每个y元，则所列二元一次方程组正确的是（）A．B．C．D．8．（4分）（2019秋•锦江区校级期中）已知△ABC，A（1，1），B（3，1），C（4，4），若y ＝x+b与△ABC有交点，则b取值范围为（）A．b≤﹣B．﹣≤b≤2C．≤b≤2D．b或b≥2 9．（4分）（2018秋•西湖区期末）若实数a，b，c满足a+b+c＝0，且a＜b＜c，则函数y＝﹣cx﹣a的图象可能是（）A．B．C．D．10．（4分）（2009•鄂州校级模拟）如图，已知点A的坐标为（0，1），点B的坐标为（，﹣2），点P在直线y＝﹣x上运动，当|P A﹣PB|最大时点P的坐标为（）A．（2，﹣2）B．（4，﹣4）C．（，﹣）D．（5，﹣5）二、填空题（每小题4分，共16分）11．（4分）（2004•哈尔滨）函数y＝+中自变量x的取值范围是．12．（4分）（2019秋•锦江区校级期中）将直线y＝3x+1向左平移2个单位并向下平移4个单位，平移后所得直线的解析式为．13．（4分）（2019秋•锦江区校级期中）直线y＝kx+2和两坐标轴相交所围成的三角形面积为12，则k值为．14．（4分）Rt△ABC．∠ACB＝90°，点D是AB中点且CD＝，如果Rt△ABC面积为1，则它周长为．三、计算题（每小题5分，共20分）15．（5分）（2019秋•锦江区校级期中）计算：（﹣3）0﹣+|1﹣|+．16．（5分）（2019秋•锦江区校级期中）解方程组（1）（2）（3）解不等式组，并把不等式组的解集在数轴上表示出来．四、解答愿（4小题，共34分）17．（7分）（2014秋•耒阳市校级期末）如图，图中的小方格都是边长为1的正方形，若A （﹣x，），B（2x﹣1，），C（z+1，），已知A、B关于原点对称，C 在二、四象限平分线上．（1）求A、B、C点的坐标；（2）结合A、B、C的坐标，画出坐标轴；（3）求出△ABC的面积．18．（8分）（2019•金台区二模）为了贯彻落实“精准扶贫”精神，某单位决定运送一批物资到某贫困村，货车自早上8时出发，行驶一段路程后发现未带货物清单，便立即以50km/h的速度回返，与此同时单位派车去送清单，途中相遇拿到清单后，货车又立即掉头并开到目的地，整个过程中，货车距离出发地的路程s（km）与行驶时间t（h）的函数图象如图所示．（1）两地相距千米，当货车司机拿到清单时，距出发地千米．（2）试求出途中BC段的函数表达式，并计算出中午12点时，货车离贫困村还有多少千米？19．（9分）（2019春•增城区期中）在平面直角坐标系中，O为坐标原点，点A的坐标为（a，﹣a），点B坐标为（b，c），a、b、c满足．（1）若a没有平方根，判断点A在第几象限并说明理由；（2）若点A到y轴的距离是点B到y轴距离的3倍，求点B的坐标；（3）点D的坐标为（2，﹣4），△OAB的面积是△DAB面积的2倍，求点B的坐标．20．（10分）（2019秋•锦江区校级期中）如图，直线y＝kx+b与x轴、y轴分别交于点A（4，0）、B（0，4），点P在x轴上运动，连接PB，将△OBP沿直线BP折叠，点O的对应点记为O'．（1）求k、b的值；（2）在x轴上是否存在点C，使得△ABC为等腰三角形？若存在，求出点C的坐标；若不存在，说明理由．（3）若点O′恰好落在直线AB上，求△OBP的面积．一，填空题（每题4分，共20分）21．（4分）（2019秋•锦江区校级期中）若xy＝5，x+y＝﹣6，则+＝．22．（4分）（2019秋•锦江区校级期中）已知关于x的不等式组，只有三个整数解，则实数a的取值范围是．23．（4分）（2019春•长宁区期末）我们知道：当x＝2时，不论k取何实数，函数y＝k（x ﹣2）+3的值为3，所以直线y＝k（x﹣2）+3一定经过定点（2，3）；同样，直线y＝（k ﹣2）x+3k一定经过的定点为．24．（4分）（2015•达州）在直角坐标系中，直线y＝x+1与y轴交于点A1，按如图方式作正方形A1B1C1O、A2B2C2C1、A3B3C3C2…，A1、A2、A3…在直线y＝x+1上，点C1、C2、C3…在x轴上，图中阴影部分三角形的面积从左到右依次记为S1、S2、S3、…S n，则S n 的值为（用含n的代数式表示，n为正整数）．25．（4分）（2017秋•姜堰区期中）如图，在平面直角坐标系xOy中，A（0，6），B（4，0），直线l的函数关系式为y＝kx（k＞0），过点A作AP⊥直线l，垂足为P，连接BP，则BP 的最小值是．二、解答题（26题8分，27题10分，28题12分，共30分）26．（8分）（2015•梧州）梧州市特产批发市场有龟苓膏粉批发，其中A品牌的批发价是每包20元，B品牌的批发价是每包25元，小王需购买A、B两种品牌的龟苓膏共1000包．（1）若小王按需购买A、B两种品牌龟苓膏粉共用22000元，则各购买多少包？（2）凭会员卡在此批发市场购买商品可以获得8折优惠，会员卡费用为500元．若小王购买会员卡并用此卡按需购买1000包龟苓膏粉，共用了y元，设A品牌买了x包，请求出y与x之间的函数关系式．（3）在（2）中，小王共用了20000元，他计划在网店包邮销售这批龟苓膏粉，每包龟苓膏粉小王需支付邮费8元，若每包销售价格A品牌比B品牌少5元，请你帮他计算，A品牌的龟苓膏粉每包定价不低于多少元时才不亏本（运算结果取整数）？27．（10分）（2019•大东区二模）（1）问题背景：如图1，在正方形ABCD中，点M，N分别在边BC，CD上，连接MN，且∠MAN＝45°，将△ADN绕点A顺时针旋转90°，得到△ABG，可证△AMG≌△AMN，易得线段MN、BM、DN之间的数量关系为：（直接填写）；（2）实践应用：在平面直角坐标系中，边长为5的正方形OABC的两顶点分别在y轴、x轴的正半轴上，O在原点．现将正方形OABC绕点O按顺时针方向旋转，旋转角为θ，当点A第一次落在直线y＝x上时停止旋转，旋转过程中，AB边交直线y＝x于点M，BC边交x轴于点N．如图2，设△MBN的周长为P，在旋转正方形OABC的过程中，P值是否有变化？请证明你的结论；（3）拓展研究：如图3，将正方形改为长与宽不相等的矩形，且∠MAN＝∠CMN＝45°，请你直接写出线段MN、BM、DN之间的数量关系．28．（12分）（2019秋•锦江区校级期中）已知直线l1：y＝﹣x+b与x轴交于点A，直线l2：y＝x﹣与x轴交于点B，直线l1，l2交于点C，且C点的横坐标为1．（1）过点A作x轴的垂线，若点P（x，2）为垂线上的一个点，求直线PC的解析式；（2）如图1，若P在过点A作x轴的垂线上，点Q为y轴上的一个动点，当CP+PQ+QA 值最小时，求此时P的坐标；（3）如图2，点E的坐标为（﹣2，0），将直线l1绕点C旋转，使旋转后的直线l3刚好过点E，过点C作平行于x轴的直线l4，点M、N分别为直线l3、l4上的两个动点，是否存在点M、N，使得△BMN是以M点为直角顶点的等腰直角三角形？若存在，请直接写出N点的坐标；若不存在，请说明理由．2019-2020学年四川省成都七中嘉祥外国语学校八年级（上）期中数学试卷参考答案与试题解析一、选择题（共10小题，每小题4分，满分40分）1．（4分）（2009秋•姜堰区期中）在数中，有理数的个数为（）A．3B．4C．5D．6【分析】根据有理数的概念可判断出有理数的个数．【解答】解：在数中，理数有，，﹣，0.303030…，共4个．故选：B．【点评】此题考查了有理数的定义及其分类．有理数都可以化为小数，其中整数可以看作小数点后面是零的小数，例5＝5.0；分数都可以化为有限小数或无限循环小数．有限小数和无限循环小数都可以化为分数，也就是说，一切有理数都可以用分数来表示．2．（4分）（2019秋•锦江区校级期中）下列说法错误的是（）A．的平方根是±B．﹣9是81的一个平方根C．的算术平方根是4D．＝﹣3【分析】根据平方根的定义、算术平方根的定义、以及立方根的定义逐项分析即可．【解答】解：A、因为（±）2＝，所以的平方根是±，故该选项说法正确；B、因为（﹣9）2＝81，所以﹣9是81的一个平方根，关系选项说法正确；C、因为＝4，所以的算术平方根2，不是4，故该选项说法错误；D、因为（﹣3）3＝﹣27，所以＝﹣3，故该选项说法正确；故选：C．【点评】本题考查了平方根的定义、算术平方根的定义、以及立方根的定义，解题的关键是准确掌握各种定义．3．（4分）（2019秋•江阴市期中）三角形的三边分别为a、b、c，由下列条件不能判断它是直角三角形的是（）A．B．a2﹣b2＝c2C．a2＝（b+c）（b﹣c）D．a：b：c＝13：5：12【分析】根据勾股定理的逆定理逐个判断即可．【解答】解：A、∵，b＝，c＝，∴b2+c2≠a2，即此三角形不是直角三角形，故本选项符合题意；B、∵a2﹣b2＝c2，∴b2+c2＝a2，即此三角形是直角三角形，故本选项不符合题意；C、∵a2＝（b+c）（b﹣c）＝b2﹣c2，∴a2+c2＝b2，即此三角形是直角三角形，故本选项不符合题意；D、∵a：b：c＝13：5：12，∴b2+c2＝a2，即此三角形是直角三角形，故本选项不符合题意；故选：A．【点评】本题考查了勾股定理的逆定理，能熟记勾股定理的逆定理的内容是解此题的关键，注意：如果一个三角形两边的平方和等于第三边的平方，那么这个三角形是直角三角形．4．（4分）（2016春•五莲县期末）若a，b为实数，且|a﹣3|+（b+2）2＝0，点P（﹣a，﹣b）的坐标是（）A．（﹣2，3）B．（2，﹣3）C．（﹣3，2）D．（﹣3，﹣2）【分析】先根据非负数的性质求出a，b的值，即可确定P点的坐标．【解答】解：∵|a﹣3|+（b+2）2＝0，∴a﹣3＝0，b+2＝0，∴a＝3，b＝﹣2，∴P（﹣3，2），故选：C．【点评】本题考查了点的坐标，解决本题的关键是先根据非负数的性质求出a，b的值．5．（4分）（2018秋•三明期末）在平面直角坐标系中，点M在第四象限，到x轴，y轴的距离分别为6，4，则点M的坐标为（）A．（4，﹣6）B．（﹣4，6）C．（﹣6，4）D．（﹣6，﹣4）【分析】已知点M在第四象限内，那么横坐标大于0，纵坐标小于0，进而根据到坐标轴的距离判断坐标．【解答】解：因为点M在第四象限，所以其横、纵坐标分别为正数、负数，又因为点M到x轴的距离为6，到y轴的距离为4，所以点M的坐标为（4，﹣6）．故选：A．【点评】本题主要考查了点在第四象限时点的坐标的符号，点到x轴的距离为点的纵坐标的绝对值，到y轴的距离为点的横坐标的绝对值．6．（4分）（2019秋•濉溪县期末）一次函数y＝（2m﹣10）x+2m﹣8的图象不经过第三象限，则m的取值范围是（）A．m＜5B．m＞4C．4≤m＜5D．4＜m＜5【分析】由一次函数y＝kx+b的图象不经过第三象限，则图象经过第一、二、四象限或二、四象限，那么k＜0，b≥0，由此即可确定题目m的取值范围．【解答】解：∵函数y＝（2m﹣10）x+2m﹣8的图象不经过第三象限，∴函数y＝（2m﹣10）x+2m﹣8的图象经过第一、二、四象限或二、四象限，∴2m﹣10＜0且2m﹣8≥0，解得4≤m＜5．故选：C．【点评】本题主要考查一次函数图象在坐标平面内的位置与k、b的关系．解答本题注意理解：直线y＝kx+b所在的位置与k、b的符号有直接的关系．k＞0时，直线必经过一、三象限；k＜0时，直线必经过二、四象限；b＞0时，直线与y轴正半轴相交；b＝0时，直线过原点；b＜0时，直线与y轴负半轴相交．7．（4分）（2017•泰安模拟）早餐店里，李明妈妈买了5个馒头，3个包子，老板少要1元，只要10元；王红爸爸买了8个馒头，6个包子，老板九折优惠，只要18元．若馒头每个x元，包子每个y元，则所列二元一次方程组正确的是（）A．B．C．D．【分析】根据题意可得等量关系：①5个馒头的钱+3个包子的钱＝10+1元；②（8个馒头的钱+6个包子的钱）×9折＝18元，根据等量关系列出方程组即可．【解答】解：若馒头每个x元，包子每个y元，由题意得：，故选：B．【点评】此题主要考查了由实际问题抽象出二元一次方程组的应用，关键是正确理解题意，根据花费列出方程．8．（4分）（2019秋•锦江区校级期中）已知△ABC，A（1，1），B（3，1），C（4，4），若y ＝x+b与△ABC有交点，则b取值范围为（）A．b≤﹣B．﹣≤b≤2C．≤b≤2D．b或b≥2【分析】把C点和B点坐标分别代入y＝x+b中求出对应的b的值，从而得到直线y＝x+b与△ABC有交点时，b的取值范围．【解答】解：把C（4，4）代入y＝x+b得2+b＝4，解得b＝2，把B（3，1）代入y＝x+b得+b＝1，解得b＝﹣，所以当直线y＝x+b与△ABC有交点时，b的取值范围是﹣≤b≤2．故选：B．【点评】本题考查了一次函数与系数的关系：由于y＝kx+b与y轴交于（0，b），当b＞0时，（0，b）在y轴的正半轴上，直线与y轴交于正半轴；当b＜0时，（0，b）在y轴的负半轴，直线与y轴交于负半轴．9．（4分）（2018秋•西湖区期末）若实数a，b，c满足a+b+c＝0，且a＜b＜c，则函数y＝﹣cx﹣a的图象可能是（）A．B．C．D．【分析】先判断出a是负数，c是正数，然后根据一次函数图象与系数的关系确定图象经过的象限以及与y轴的交点的位置即可得解．【解答】解：∵a+b+c＝0，且a＜b＜c，∴a＜0，c＞0，（b的正负情况不能确定），∴﹣a＞0，﹣c＜0，∴函数y＝﹣cx﹣a的图象经过二、一、四象限．故选：B．【点评】本题主要考查了一次函数图象与系数的关系，先确定出a、c的正负情况是解题的关键，也是本题的难点．10．（4分）（2009•鄂州校级模拟）如图，已知点A的坐标为（0，1），点B的坐标为（，﹣2），点P在直线y＝﹣x上运动，当|P A﹣PB|最大时点P的坐标为（）A．（2，﹣2）B．（4，﹣4）C．（，﹣）D．（5，﹣5）【分析】根据轴对称的性质及待定系数法可求得答案．【解答】解：作A关于直线y＝﹣x对称点C，易得C的坐标为（﹣1，0）；连接BC，可得直线BC的方程为y＝﹣x﹣；求BC与直线y＝﹣x的交点，可得交点坐标为（4，﹣4）；此时|P A﹣PB|＝|PC﹣PB|＝BC取得最大值，其他BCP不共线的情况，根据三角形三边的关系可得|PC﹣PB|＜BC；故选：B．【点评】本题考查轴对称的运用，有很强的综合性，难度较大．二、填空题（每小题4分，共16分）11．（4分）（2004•哈尔滨）函数y＝+中自变量x的取值范围是3＜x≤5．【分析】本题主要考查自变量的取值范围，函数关系中主要有二次根式和分式两部分．根据二次根式的性质和分式的意义，被开方数大于等于0，分母不等于0，列不等式组求解．【解答】解：根据题意得：，解得：3＜x≤5．【点评】主要考查了函数自变量的取值范围的确定和分式的意义．函数自变量的范围一般从三个方面考虑：（1）当函数表达式是整式时，自变量可取全体实数；（2）当函数表达式是分式时，考虑分式的分母不能为0；（3）当函数表达式是二次根式时，被开方数为非负数．12．（4分）（2019秋•锦江区校级期中）将直线y＝3x+1向左平移2个单位并向下平移4个单位，平移后所得直线的解析式为y＝3x+3．【分析】直接根据“上加下减，左加右减”的平移规律求解即可．【解答】解：将直线y＝3x+1向左平移2个单位并向下平移4个单位，所得直线的解析式为y＝3（x+2）+1﹣4，即y＝3x+3．故答案为y＝3x+3．【点评】本题考查图形的平移变换和函数解析式之间的关系，在平面直角坐标系中，平移后解析式有这样一个规律“左加右减，上加下减”．13．（4分）（2019秋•锦江区校级期中）直线y＝kx+2和两坐标轴相交所围成的三角形面积为12，则k值为．【分析】首先表示出直线y＝kx+2与两坐标轴的交点，然后再根据题意列出方程，再解即可．【解答】解：∵直线y＝kx+2与x轴交于点（﹣，0），与y轴交于（0，2），∴两坐标轴相交所围成的三角形面积为|﹣|×2×＝12，解得：k＝，故答案为：．【点评】此题主要考查了一次函数图象上点的坐标特点，关键是正确表示出图象与两坐标轴的交点．14．（4分）Rt△ABC．∠ACB＝90°，点D是AB中点且CD＝，如果Rt△ABC面积为1，则它周长为．【分析】由直角三角形斜边上的中线可求解AB的长，利用勾股定理，完全平方公式，结合△ABC的面积可求解AC+BC的值，进而可求解△ABC的周长．【解答】解：在Rt△ABC．∠ACB＝90°，∴AC2+BC2＝AB2，∵D是AB中点且CD＝，∴AB＝2CD＝，∴AC2+BC2＝AB2＝5，∵Rt△ABC面积为1，即，∴BC•AC＝2，∵（AC+BC）2＝AC2+BC2+2BC•AC＝5+2×2＝9，∴AC+BC＝3，∴△ABC的周长为AC+BC+AB＝．故答案为．【点评】本题主要考查直角三角形斜边上的中线，勾股定理，完全平方公式，灵活运用直角三角形斜边上的中线的性质及完全平方公式是解题的关键．三、计算题（每小题5分，共20分）15．（5分）（2019秋•锦江区校级期中）计算：（﹣3）0﹣+|1﹣|+．【分析】直接利用零指数幂的性质以及二次根式的性质和绝对值的性质分别化简得出答案．【解答】解：原式＝1﹣3+﹣1+﹣＝﹣2．【点评】此题主要考查了零指数幂的性质以及二次根式的性质和绝对值的性质，正确化简各数是解题关键．16．（5分）（2019秋•锦江区校级期中）解方程组（1）（2）（3）解不等式组，并把不等式组的解集在数轴上表示出来．【分析】（1）根据代入消元法，可得答案；（2）根据加减消元法，可得答案；（3）分别求出每一个不等式的解集，根据口诀：同大取大、同小取小、大小小大中间找、大大小小无解了确定不等式组的解集．【解答】（1）解：由①得：y＝2x+4．代入②得：4x﹣5（2x+4）＝﹣23，所以x＝．代入①得：2×﹣y＝﹣4，y＝5．故方程组的解为．（2）解：原方程组整理得①+②得：2x＝﹣6，即x＝﹣3，把x＝﹣3代入②得：﹣6﹣3y＝1，解得：y＝﹣，故方程组的解为；（3）解：，解不等式①，得：x≥﹣1，解不等式②，得：x＜3，则不等式组的解集为﹣1≤x＜3，将不等式组的解集表示在数轴上如下：．【点评】本题考查的是解一元一次不等式组，正确求出每一个不等式解集是基础，熟知“同大取大；同小取小；大小小大中间找；大大小小找不到”的原则是解答此题的关键．四、解答愿（4小题，共34分）17．（7分）（2014秋•耒阳市校级期末）如图，图中的小方格都是边长为1的正方形，若A （﹣x，），B（2x﹣1，），C（z+1，），已知A、B关于原点对称，C 在二、四象限平分线上．（1）求A、B、C点的坐标；（2）结合A、B、C的坐标，画出坐标轴；（3）求出△ABC的面积．【分析】（1）根据题目中的信息，可知点A，B的横坐标和纵坐标分别互为相反数，点C 的横纵坐标互为相反数，从而可以解得点A、B、C三点的坐标．（2）根据第（1）问中求得的各点的坐标画出平面直角坐标系．（3）根据A、B、C三点的坐标，将△ABC放在矩形AEFG中，从而求出相应三角形的面积．【解答】解：（1）∵图中的小方格都是边长为1的正方形，若A（﹣x，），B（2x ﹣1，），C（z+1，），已知A、B关于原点对称，C在二、四象限平分线上．∴，解得．∴点A的坐标为：（﹣1，﹣3），点B的坐标为：（1，3），点C的坐标为：（2，﹣2）．（2）由点A的坐标为：（﹣1，﹣3），点B的坐标为：（1，3），点C的坐标为：（2，﹣2）．可得A、B、C三点所在的坐标系如下图：（3）如下图所示：∵点A的坐标为：（﹣1，﹣3），点B的坐标为：（1，3），点C的坐标为：（2，﹣2）．∴S△ABC＝S矩形AEFG﹣S△AEC﹣S△CFB﹣S△ABG＝．【点评】本题考查在平面直角坐标系中两点关于原点对称，二四象限角平分线上点的坐标的相关知识，根据各点的坐标可以画出相应的平面之家坐标系，根据三角形各点在平面直角坐标系中的坐标，将△ABC放在矩形AEFG中，从而求出相应三角形的面积．18．（8分）（2019•金台区二模）为了贯彻落实“精准扶贫”精神，某单位决定运送一批物资到某贫困村，货车自早上8时出发，行驶一段路程后发现未带货物清单，便立即以50km/h的速度回返，与此同时单位派车去送清单，途中相遇拿到清单后，货车又立即掉头并开到目的地，整个过程中，货车距离出发地的路程s（km）与行驶时间t（h）的函数图象如图所示．（1）两地相距172千米，当货车司机拿到清单时，距出发地40千米．（2）试求出途中BC段的函数表达式，并计算出中午12点时，货车离贫困村还有多少千米？【分析】（1）依据函数图象中y的最大值可得到两地的距离，用80减去从2小时到2.8小时的路程即可；（2）先求得BC段的速度，然后计算出距离贫困村的距离即可．【解答】解：（1）当t＝5时，y＝172km，所以两地相距172km．80﹣50×（2.8﹣2）＝80﹣40＝40km，所以货车司机拿到清单时，距出发地40千米．故答案为：172；40．（2）设直线BC的解析式为y＝kx+b，∵B（2.8，40），C（5，172），∴，解得，∴直线BC的解析式为y＝60x﹣128．（172﹣40）÷（5﹣2.8）＝60千米/小时．60×1＝60，所以中午12点时，货车离贫困村还有60千米【点评】本题主要考查的是一次函数的应用，读懂函数图象是解题的关键．19．（9分）（2019春•增城区期中）在平面直角坐标系中，O为坐标原点，点A的坐标为（a，﹣a），点B坐标为（b，c），a、b、c满足．（1）若a没有平方根，判断点A在第几象限并说明理由；（2）若点A到y轴的距离是点B到y轴距离的3倍，求点B的坐标；（3）点D的坐标为（2，﹣4），△OAB的面积是△DAB面积的2倍，求点B的坐标．【分析】（1）根据负数没有平方根进行解答即可；（2）解方程组得出关于a的代数式，分两种情况解答即可；（3）根据AB坐标判断线段AB平行于x轴，进而解答即可．【解答】解：（1）∵a没有平方根，∴a＜0，∴﹣a＞0，∴点A（a，﹣a）在第二象限；（2）由方程组，用a表示b，c得b＝﹣a+4，c＝﹣a，再利用点A到y轴的距离是点B到y轴距离的3倍得：|﹣a|＝3|﹣a+4|，可以分两种情况分析：①﹣a＝3（﹣a+4），解之，得a＝6，所以b＝﹣2，c＝﹣6；②﹣a＝﹣3（﹣a+4），解之，得a＝3，所以b＝1，c＝﹣3；综上，B（﹣2，﹣6）或B（1，﹣3）；（3）利用A（a，﹣a）和B（﹣a+4，﹣a），可以判断线段AB平行于x轴．由点D的坐标（2，﹣4），△OAB的面积是△DAB面积的2倍，可以判断点A和点B在x轴的下方，则a＞0，AB•a＝2×AB•|a﹣4|，解得，a＝或a＝8，所以，B（，）或B（﹣4，﹣8）．【点评】本题考查了坐标与图形性质：利用点的坐标计算线段的长和判断线段与坐标轴的位置关系．也考查了三角形的面积公式．20．（10分）（2019秋•锦江区校级期中）如图，直线y＝kx+b与x轴、y轴分别交于点A（4，0）、B（0，4），点P在x轴上运动，连接PB，将△OBP沿直线BP折叠，点O的对应点记为O'．（1）求k、b的值；（2）在x轴上是否存在点C，使得△ABC为等腰三角形？若存在，求出点C的坐标；若不存在，说明理由．（3）若点O′恰好落在直线AB上，求△OBP的面积．【分析】（1）用待定系数法直接求出；（2）分三种情形讨论，①当AB＝AC时，②当BA＝BC时，③当CA＝CB时；分别求出即可；（3）分P在x轴的正半轴和负半轴：①当P在x轴的正半轴时，求OP＝O'P＝AO'＝4﹣4，根据三角形面积公式可得结论；②当P在x轴的负半轴时，同理可得结论．【解答】解：（1）∵点A（4，0）、B（0，4）在直线y＝kx+b上，∴，解得：k＝﹣1，b＝4；（2）存在，理由如下：如图1所示，①当AB＝AC时，AC＝AB＝＝4，可得C1（4﹣4，0），C2（4+4，0）．②当BA＝B时，OA＝OC＝4，可得C3（﹣4，0）．③当CA＝CB时，点C与点O重合，可得C4（0，0），综上所述，满足条件的点C坐标为（4﹣4，0）或（4+4，0）或（﹣4，0）或（0，0）．（3）存在两种情况：①当P在x轴的正半轴上时，如图2所示：点O′恰好落在直线AB上，则OP＝O'P，∠BO'P＝∠BOP＝90°，∵OB＝OA＝4，∴△AOB是等腰直角三角形，∴AB＝4，∠OAB＝45°，由折叠得：∠OBP＝∠O'BP，BP＝BP，∠PO'B＝∠POB＝90°，∴∠PO'A＝90°，∴O'B＝OB＝4，∴AO'＝4﹣4，Rt△PO'A中，O'P＝AO'＝4﹣4＝OP，∴S△OBP＝OB•OP＝×4×（4﹣4）＝8﹣8；②当P在x轴的负半轴时，如图3所示：由折叠得：∠PO'B＝∠POB＝90°，O'B＝OB＝4，∵∠BAO＝45°，∴PO'＝PO＝AO'＝4+4，∴S△OBP＝OB•OP＝×4×（4+4）＝8+8；综上所述，△OBP的面积为8﹣8或8+8．【点评】此题是一次函数综合题，考查了待定系数法、坐标与图形性质、折叠的性质、勾股定理、等腰直角三角形的判定与性质、三角形的面积公式、等腰三角形的性质以及分类讨论等知识；本题综合性强，熟练掌握待定系数法和等腰三角形的性质，进行分类讨论是解题的关键．一，填空题（每题4分，共20分）21．（4分）（2019秋•锦江区校级期中）若xy＝5，x+y＝﹣6，则+＝．【分析】根据有理数的加法法则、乘法法则得到x＜0，y＜0，根据二次根式的混合运算法则把原式化简，代入计算即可．【解答】解：∵xy＝5，x+y＝﹣6，∴x＜0，y＜0，∴+＝﹣﹣＝﹣（+）＝﹣×＝，故答案为：．【点评】本题考查的是二次根式的化简求值，掌握二次根式的混合运算法则是解题的关键．22．（4分）（2019秋•锦江区校级期中）已知关于x的不等式组，只有三个整数解，则实数a的取值范围是﹣2＜a≤﹣1．【分析】先求出不等式组的解集，再根据不等式组有且只有三个整数解求出整数解，得出关于a的不等式组，解得即可．【解答】解；由不等式组得；a≤x＜2，∵只有三个整数解，∴a的取值范围是﹣2＜a≤﹣1，故答案为﹣2＜a≤﹣1．【点评】本题考查了解一元一次不等式组，不等式组的整数解的应用，解此题的关键是能根据已知和不等式组的解集得出关于a的不等式组．23．（4分）（2019春•长宁区期末）我们知道：当x＝2时，不论k取何实数，函数y＝k（x ﹣2）+3的值为3，所以直线y＝k（x﹣2）+3一定经过定点（2，3）；同样，直线y＝（k﹣2）x+3k一定经过的定点为（﹣3，6）．【分析】先将y＝（k﹣2）x+3k化为：y＝（x+3）k﹣2x，可得当x＝﹣3时，不论k取何实数，函数y＝（x+3）k﹣2x的值为6，即可得到直线y＝（k﹣2）x+3k一定经过的定点为（﹣3，6）．【解答】解：根据题意，y＝（k﹣2）x+3k可化为：y＝（x+3）k﹣2x，∴当x＝﹣3时，不论k取何实数，函数y＝（x+3）k﹣2x的值为6，∴直线y＝（k﹣2）x+3k一定经过的定点为（﹣3，6），故答案为：（﹣3，6）．【点评】本题主要考查了一次函数图象上点的坐标特征，直线上任意一点的坐标都满足函数关系式y＝kx+b．24．（4分）（2015•达州）在直角坐标系中，直线y＝x+1与y轴交于点A1，按如图方式作正方形A1B1C1O、A2B2C2C1、A3B3C3C2…，A1、A2、A3…在直线y＝x+1上，点C1、C2、C3…在x轴上，图中阴影部分三角形的面积从左到右依次记为S1、S2、S3、…S n，则S n 的值为22n﹣3（用含n的代数式表示，n为正整数）．【分析】根据直线解析式先求出OA1＝1，得出第一个正方形的边长为1，求得A2B1＝A1B1＝1，再求出第二个正方形的边长为2，求得A3B2＝A2B2＝2，第三个正方形的边长为22，求得A4B3＝A3B3＝22，得出规律，根据三角形的面积公式即可求出S n的值．【解答】方法一：解：∵直线y＝x+1，当x＝0时，y＝1，当y＝0时，x＝﹣1，∴OA1＝1，OD＝1，∴∠ODA1＝45°，∴∠A2A1B1＝45°，∴A2B1＝A1B1＝1，∴S1＝×1×1＝，∵A2B1＝A1B1＝1，∴A2C1＝2＝21，∴S2＝×（21）2＝21同理得：A3C2＝4＝22，…，S3＝×（22）2＝23∴S n＝×（2n﹣1）2＝22n﹣3故答案为：22n﹣3．方法二：∵y＝x+1，正方形A1B1C1O，∴OA1＝OC1＝1，A2C1＝2，B1C1＝1，∴A2B1＝1，S1＝，∵OC2＝1+2＝3，∴A3C2＝4，B2C2＝2，∴A3B2＝2，S2＝2，∴q＝＝4，∴S n＝．【点评】本题考查了一次函数图象上点的坐标特征以及正方形的性质；通过求出第一个正方形、第二个正方形和第三个正方形的边长得出规律是解决问题的关键．25．（4分）（2017秋•姜堰区期中）如图，在平面直角坐标系xOy中，A（0，6），B（4，0），直线l的函数关系式为y＝kx（k＞0），过点A作AP⊥直线l，垂足为P，连接BP，则BP 的最小值是2．【分析】依据∠APO＝90°，即可得到点P的轨迹为以AO为直径的半圆O'，连接BO'，PO'，当O'，P，B在同一直线上时，BP的最小值为BO'﹣O'P，利用勾股定理即可得到BO'﹣O'P＝5﹣3＝2，即可得到BP的最小值是2．【解答】解：如图，∵AP⊥直线l，垂足为P，直线l的函数关系式为y＝kx（k＞0），∴点P的轨迹为以AO为直径的半圆O'，连接BO'，PO'，∵BP+O'P≥BO'，∴BP≥BO'﹣O'P，∴当O'，P，B在同一直线上时，BP的最小值为BO'﹣O'P，又∵Rt△BO'O中，OO'＝AO＝3，BO＝4，∴BO'＝5，∴BO'﹣O'P＝5﹣3＝2，∴BP的最小值是2，故答案为：2．【点评】本题主要考查了一次函数的图象，最短距离问题以及勾股定理的运用，熟知“两点之间线段最短”是解答此题的关键．二、解答题（26题8分，27题10分，28题12分，共30分）26．（8分）（2015•梧州）梧州市特产批发市场有龟苓膏粉批发，其中A品牌的批发价是每包20元，B品牌的批发价是每包25元，小王需购买A、B两种品牌的龟苓膏共1000包．（1）若小王按需购买A、B两种品牌龟苓膏粉共用22000元，则各购买多少包？（2）凭会员卡在此批发市场购买商品可以获得8折优惠，会员卡费用为500元．若小王购买会员卡并用此卡按需购买1000包龟苓膏粉，共用了y元，设A品牌买了x包，请求出y与x之间的函数关系式．（3）在（2）中，小王共用了20000元，他计划在网店包邮销售这批龟苓膏粉，每包龟苓膏粉小王需支付邮费8元，若每包销售价格A品牌比B品牌少5元，请你帮他计算，A品牌的龟苓膏粉每包定价不低于多少元时才不亏本（运算结果取整数）？（1）设小王需购买A、B两种品牌龟苓膏粉分别为x包、y包，则，【分析】据此求出小王购买A、B两种品牌龟苓膏粉分别为多少包即可．（2）根据题意，可得y＝500+0.8×[20x+25（1000﹣x）]，据此求出y与x之间的函数关系式即可．（3）首先求出小王购买A、B两种品牌龟苓膏粉分别为多少包，然后设A种品牌龟苓膏粉的售价为z元，则B种品牌龟苓膏粉的售价为z+5元，所以125z+875（z+5）≥20000+8×1000，据此求出A品牌的龟苓膏粉每包定价不低于多少元时才不亏本即可．【解答】解：（1）设小王需购买A、B两种品牌龟苓膏粉分别为x包、y包，则解得。

嘉祥外国语学校2020-2021年八年级下入学试卷第二部分基础知识运用(共25小题,计30分)六、单项选择,A.从以下各题的A、B、C.三个选项中选出正确答案.(共10小题,每小题1分,计10分)31.He wrote_____music but he couldn't write its lyrics.A.aB. anC. the32.As a friend of_______,Gina always helps me with my English.A. meB.myC. mine33. It______be Linda's backpack.I'm not sure.A. mustB. mightC.can't34. It isn't very warm______it's already spring now.A.althoughB. butC.unless35. Doctors often say,“__________vegetables and less meat can help you keep fit."A. MoreB. LessC.Fewer36. Tony. ______your homework more carefully next time. So you won't make so many mistakes.A. doesB. doC.will do37. There___a sports meeting in our school next month. We can't wait!A.will haveB. is going to haveC. is going to be38.-- May I book a table for four at 6:30 tonight?--Certainly, sir. A table for four at 6:30 p.m. We______to your coming.A. pay attentionB. get used toC. look forward39. --Do you mind me opening the window here?--_______. It's too cold outside.A. Go aheadB. You'd better notC. Never mind40. --I wonder___________.--Sure. I'd love to.A. where the nearest supermarket isB. whether you can help me with itC. if there is a supermarket near hereB.完成对话。

成都嘉祥外国语学校八年级下期 Unit 7单元考试一．单选1.Chengdu isn’t so large______________ Shanghai, however it’s _____________than anyother______________ in Western China.A.as; largest; cityB. like; larger; citiesC. as; larger; city2.The Sahara is about 29 ____________ the Talamakan which is the largest one in China. TheStory in Sahara______________ by Sanmao is very popular with _____________ of readers.A.times as large as; written; millionsB.time as larger as; wrote; millionC.times larger; written; million3.There are three hundred people____________ over there, ______________ some students.Even some babies are still ______________.A.about; include; includingB.around; including; includedC.or so; including; included4.The mountain I visited last Sunday isn’t very______________. Few _____________ gosightseeing.A.touristy; touristB. touristy; touristsC. tourist; tourist5.The swimming pool is about _____________ and there is also an ______________playground.A.fifty meters long; eighty-meter-longB.fifty meters long; eight meters longC.fifty-meter-long; eighty-meter-long6.—— _____________ is the population in India?—Maybe __________ more than one billion and 60% of the population____________ men.A.Where ;they’re; isB.What ; it is; areC.What; it’s; is7.She is always the first one ___________ school and the last one__________. So she has gotgood grades in the mid-term exam.A.to come; to go backB. to reach; to go backC. arriving; to back8._________________I know, he is ___________ in painting. Because he always gets someprizes in many competitions.A.So far as; strongB. As far as; weakC. As long as; well9.Please feel free __________and___________ here. It’s just like your own house.A.to look around; to enjoy yourselfB.to look around; enjoy yourselfC.looking around; enjoy yourself10.Do you know the_________ of the big stone?Yes, it_______________about 200______________.A.weight; weighs; kilosB.weights; weighes; kilosC.weight; weighs; kilos二．补全对话A: Hi, Li Ming! Kong: Skull of island(金刚:骷髅岛) Is on in many cinemas.B : Really ? __________________1___________________.A: Yeah . Would you like to go to see it with me tonight ?B:______________________2_______________. Which cinema shall we go to ?A: ______________________3_____________. It has the best service.B : But it is too far , and it is the most expensive.Lets go to Gold Cinema . __________4______________________.A: Sounds good . _____________________5________________.B : It is only five yuan if we take our student ID cards with us.A.How about City Cinema?B.How much is a ticket there?C.I heard it is a great movie.D.Sure, I’d love to.E.It is near and it is the cheapest.12345三．完形填空AA new Chinese television drama , titled In the Name of People(人民的名义), has madewaves in the nation since it was released on Hunan Satellite TV, _______1_______ March 28 , 2 0 1 7 . In the Name of People has , so far attracted large amounts of audiences(观众) inChina . The release coincides with the Chinese government’s anti-corruption campaign(反腐运动) .In the television series, ________2________. Lu Yi stars as detective Hou Liangping and Xu Yajun stars as Liangping ' s antagonist, Qi Tongwei.In the first two episodes ( 集) ，an officer named Zhao Dehan has ______3________ much money in his villa, in the fridge, under the bed and in the wall. It’s really________4__________.The program was based on a book ,________5_________by Zhou Meisen . Due to the popularity of the TV series in China , the drama has also attracted the attention of foreign media . BBC wrote " China laps up glossy TV corruption drama”.( ) 1. A. in B. at C. on( ) 2. A. actress B. actor C. actors( ) 3. A. hid B. hide C. hidden( ) 4. A. amazed B. unbelievable C. unbelieveable( ) 5. A. wrote B. written C. writedBOnce a man and his wife worked for an old man . There was a big box in the old man’s living room. The old man pointed to the box and said , "There’s only one thing you_______1______ do. Don’t open the box . " After saying this , he left his home.The woman said to her husband , " There must be something expensive in the box. Let’s openit, __________2____ ?”Her husband said ________3______ to her . But the woman didn’t give up her ________4______. One day, she decided to find out_______5_____ was in it . Her husband couldn ' t stop her . She opened the box and looked inside . To her surprise , she found nothing in the box . She tried hard to close it , but she_________6______.That evening the old man came home and found the box was __________7__________. He was very angry and asked the woman and her husband to leave his home" But there was nothing in the box , " said the woman.”We haven’t taken______8________ at all,”The old man __________9______ them , " The box is not important , but I cannot trust you __________10_____. That ' s important!”( ) 1. A. needn’t B. dare not C. mustn’t( ) 2. A. will you B. shall we C. can we( ) 3. A. no B. yes C. much( ) 4. A. work B. idea C. box( ) 5. A. what B. that C. which( ) 6. A. refused B. failed C. stopped( ) 7. A. broke B. open C. opened( ) 8. A. something B. nothing C. anything( ) 9. A. shouted to B. shouted at C. shouted with( ) 10. A. no more B. any more C. any long四．阅读理解Different from“ non - capital functions” of Beijing, Xiongan New Area(雄安新区) should make a new balance between economic growth(经济增长) and the protection of the environment .Besides, it is not proper to compare Xiongan New Area with Shenzhen Special Economic Zone, established in the 1 9 8 0 s , or the Shanghai Pudong New Area, set up in the 1 9 9 0 s . Xiongan New Area has a wider range of goals which include studies to find ways to solve the " urban ills , and find a new way ofurbanization ( 城市化) . Since the new area will cover 2 , 0 0 0 square kilometers - from 1 0 0 square kilometers in the first period ——— it will be large enough to find ways of solving the problems faced by large cities.To support the development and growth of Xiongan New Area , some railways will be built between the new area and the cities around it such as Beijing, Tianjin and so on. So it ' s possible for the people who work in this area. It will promote the development around Jingjinji which is one of the most important area.And once hospitals , branches of universities and scientific research center are set up , and some companies move into the area , they will attract ( 吸引) resourceful and efficient talent pool , as well as more workers to Xiongan.( ) 1. Xiongan New Area will be built as the same function of Beijing.( ) 2. Two special Areas were mentioned in the passage.( ) 3. It will promote the development around the capital as well as Tianjin and Hebei province. ( ) 4. Nearly 2 0 0 0 square kilometers is covered in the first period .( ) 5. As some companies move into the area , they will attract more workers.五．阅读理解AThere are some interesting facts about the Nile●The Nile is nearly 6,671 kilometers longs. It is believed to be the longest river in theworld.●The Nile is a north - flowing river in Africa . It lies in the following countries Kenya ,Eritrea , Congo, Burundi , Uganda , Tanzania , Rwanda , Egypt , Sudan Republic of South Sudan and Ethiopia.● The Nile is important to ancient Egypt . there are lots of Ancient Egypt ' s places ofinterest along the banks of the Nile , such as Luxor and Cairo.● The Nile Delta(三角洲) in the north of Egypt is where the Nile flows into theMediterranean Sea(地中海) . It is around 1 6 0 kilometers long and about over 2 4 0 kilometers of coastline . It is rich in agriculture and has been farmed for thousands of years .Half of Egypt’s population -——around 4 0 , 0 0 0 , 0 0 0 people live in the Nile Delta Area.● In 1 7 8 7 , the famous Rosetta stone was found in the Nile delta in the city ofRosetta .It played a key role in understanding Egyptian hieroglyphics(象形文字)● The Aswan high dam(阿斯旺大坝) was builtin1970 to help control the flooding of theNile.( ) 1. How many countries does the Nile flow through?A.10B. 11C. 12( ) 2. The Nile River flows into the Mediterranean Sea in ________________.A.LuxorB. CairoC. the Nile Delta( ) 3. What’s the population of Egypt according to the passage?A.About 20,000,000B.About 40,000,000C.About 80,000,000( ) 4. Which of the following is TRUE?A.The Nile is the widest river in the world.B.The Rosetta stone is important to the hieroglyphicsC.The Aswan High Dam can stop the flooding of the Nile.( ) 5. Where can we find this passage probably?A.In a newspaperB.In a storybookC.In a science magazineBAnimals do many different , amazing things to get through the winter . Some of them migrate . They travel to other places where the weather is warmer or where they can find food .Many birds migrate in autumn . Because the trip can be dangerous , some travel in large groups . For example , geese ( 鹅) fly in noisy , "V " – shaped groups . Other kinds of birds fly alone . Some animals stay active in winter . They must change themselves as the weatherchanges . Many change their doing or their bodies . For example , snowshoe rabbits grow white fur to help them hide in the snow .Food is hard to find in winter . Some animals like mice , collect lots of food in autumn and store it to eat later . Some animals eat different kinds of foods as the seasons change . Some animals hibernate (冬眠) for part or all of the winter . This is a special , very deep sleep . the animal ' s body temperature drops , and its heartbeat and breathing slow down . it uses very little energy . In autumn , these animals get ready for winter by eating much more food than in summer and storing it as body fat . They use this fat to keep them alive while hibernating.Water makes good protection for many animals . When the weather gets cold , they move to the bottom of lakes and rivers . There , frogs and many fish hide under rocks or fallen leaves . Cold water holds more oxygen than warm water , and frogs can breathe through their skin.Every type of insects has its own life cycle and that is the way it grows and changes . Different insects spend the winter in different forms of their lives . Some insects also spend the winter without moving . Someinsects spend the winter as pupae (蛹) . Other insects die after laying eggs in autumn . The eggs change into new insects in spring and everything begins all over again.( ) 1. What does the underlined word " migrate " in the first paragraph most probably mean ?A . look for foodB .move from one place to anotherC.Sleep in the winter( ) 2 . Why do many birds fly in large groups ?A . They can easily find food this wayB . There may be danger during the tripC. They will use little energy .( ) 3 . Snowshoe rabbits , spend the cold winter by______________.A. breathing through their skinB. sleeping for the whole winterC. growing white thicker fur( ) 4 . The main purpose of the examples in the last paragraph is to tell us___________.A. different insects grow and change in the same waysB. different insects grow and change in their own waysC. most insects spend the winter without moving( )5 . What is the passage mainly about ?A. How living things grow and change in the winter .B. How living things get food in the winterC. How living things travel in the winter .B卷一．首字母填空1.Emperor Qin’s Terraotta Warriors (秦始皇兵马俑) is among the Seven Wonders ofA________________ World.2.Linda wants to sell her used bike which is in good c__________________ for just100 yuan.3.The scientist was great because he s_________________ in finding out the real causeof the disease.4.I heard that one person just died of H7N9 which was one of the most terriblei___________________.5.The ice on the river is t_______________ enough to skate on when it is in Decemberin Harbin.6.The book Harry Potter was w__________________ read by people from differentcountries.7.China has made great a_____________________ during the past 30 years since thereform and opening policy(改革开放政策) released.8.APEC(亚太经合组织) means Asia P_________________ Economy Cooperation.9.Cactus(仙人掌) can live in the d____________________ .It doesn’t need much water.10.The sea turtle is an e_____________________ species(物种) which should beprotected by us as soon as possible.二．短文填空A：Hi，Martin. You look pale. You must be _________________.B: No, I just ________________ up late watching TV for a long time last night.A: Really? You always have regular daily life. What did you watch?B: The 2017 World Snooker Championship(2017世界斯诺克锦标赛) . It was the semifinals yesterday evening and it stands for (代表) the world’s ________________________ level.A: Wow, tell me more about that. Believe it or not, I am a fan of Ding Junhui.B: Me too. But Selby(塞尔比) ________________ from England won the semifinals yesterday. It was really a pity for Ding!A: Maybe he had tried his best, and I hope he can _______________ it next year. By the way, could you tell me more details about snooker?B: No problem. I like it so much that I always practice it after work. Generally speaking, it _______________15 rids,6 colors and 1 white ball. At first, the ball is _____________ from the bones of cows. So it weighs a lot.A: It’s amazing. How is it now? I think people can solve it easily.B: Yeah. People find new_______________ materials which are not natural in our daily life to make new balls. Besides that, there are still a lot of rules during this competition. What is like most is the spirit, that is never__________________ up!A: Maybe that is the reason why so many people love it and the manners can be shown from the beginning to the end.B: That’s true. If you have time, let’s play it together one day.12345678910 shocking, feel, friend, know, loud, open, stranger, scary, seem, ask, usual, allowThere was once a boy who was afraid of the dark . He though that when it was dark his bedroom was full of monsters ( 怪物) . But when he was old enough , he was not ________1_______ to keep sleeping with the light on.That first night he was vey ______2______. His mind was full of monsters . So he went over to his wardrobe (衣柜) to get a flashlight. But when he ________3_________ the wardrobe door he was face to face with a monster , and he let out the________4_______ cry in the world. The monster took a step backward, and started crying! The monster cried for so long that the boy ' s ________5_______ and fear slowly went away. He cooled the monster down as much as he could , and started to talk to him , ________6_________ him why he was crying, and what he was doing there.The monster told him he lived in the wardrobe , but hardly went out , because he was afraid of the boy . When the boy asked him why, the monster told him the boy ' s face _______7________ to be the scariest eyes, ears and nose he ' d never seen . The boy __________8______ the same way about the monster, who had a huge head with many mouths and hair.The two of them talked so much that they became quite __________9______, and they realized that both of them had been afraid of the same thing: the ______10__________. To12345678910四．6选5Once upon a time, there was a stranger bird. He lived in a tree near the bank of a river, ________________________________.One day, one of the two heads saw a delicious fruit on a tree. He picked it and started eating the fruit. “ It is one of the most delicious fruits I have ever eaten.” he said. The other head said, “_______________________________”The first head laughed and said, “You know that we have only one stomach, It makes no difference whether I eat it or you eat it. Moreover, I’m the one who found the fruit. _____________________________”Later that day, the other head found a tree having poisonous fruits. He took a poisonous one and told the first head, “ I will eat this fruit.”The first head shouted,”___________________________ If you eat it, both of us will die.” The other head replied. “ Shut up! I’m the one who found the fruit. I have the right to eatA.Let me also taste the delicious fruit.B.So I have the right to eat it.C.The first head started crying, but the other head still ate the poisonous fruit.D.The bird had two heads, but they shared one stomach.E.The bird looks very beautiful and cute.F.Please don’t eat this poisonous fruit.六．表格题Adventure(冒险) travel is a great way to see the world. It is a kind of tourism, often to far places. Adventure travel often includes adventure activities such as mountain climbing, rock climbing and so on.These activities may bring risks to your health and safety. But they can be fun, and safe if you prepare for your trip and follow safety rules.Make an appointment (预约) with a doctor about a month before your adventure travel. Be sure to talk to the doctor about your planned adventure activities. He or she may give you some special advice.Take a first - aid course two weeks before your adventure travel. Consider taking a first - aid box with you. If you get hurt during your trip , you can give yourself some simple medical care.You ' d better buy travel insurance (保险) before you set offDuring your adventure travel, you should also follow some rules. The following are some of them.1 . Wear protective clothes when doing adventure activities2 . Always follow safety advice from your guides3 . If you go somewhere hot be sure to take sunglasses with you. They can protect you against theAdventure travelMeaning a great way of 1.___________________________a kind of tourism, often to far placesExamples mountain climbing and rock climbingInfluence advantages be fun, exciting and safedisadvantages 2.__________________________3.____________________ _before traveltalking to the doctortalking a first-aid course4.__________________________during travelwearing protective clothes5.__________________________taking sunglasses七．作文最近，丹麦驻华大使（ambassador）紧急求助，太平洋生蚝（oyster）入侵丹麦，丹麦人对此束手无策。

2019-2020年八年级下英语Unit7单元测试卷含答案一、单项填空( )1. -Do you spend a lot of time_______ computer?-No, but I spend much time_______ doing my homework.A. on; inB. in; onC. on; onD. in; in( )2. This is a new CD-ROM_______ by Johnson.A. designedB. designsC. designingD. is designed( )3. Jack felt nervous when he found the physics problems_______ to work out.A. so difficultB. difficult enoughC. too difficultD. difficult as( )4. I won't leave my office until my work_______.A. finishesB. will be finishedC. are finishedD. is finished( )5. The work of art_______ to a museum in 1979.A. sellB. soldC. was soldD. is sold( )6. -Do you think Brazil will beat(打败) Japan in the next match?-Yes, they have better players, so they_______ to win.A. are hopedB. expectC. are expectedD. were hoped( )7. The film made by Walt Disney_______ all over the world.A. is used to showB. is used to showingC. used to showD. used to be shown( )8. Linda's sister is_______ young_______ dress herself.A. so; thatB. such; thatC. too; toD. too; not to( )9. Mo Yan's books have been sold out in many book stores_______ his winning of the Nobel Literature Prize.A. becauseB. sinceC. asD. because of( )10. Li Ping_______ to give his best_______ to us.A. wishes; wishB. hopes; wishesC. wish; wishesD. hope; wish( )11. You'd better_______ here_______ it is raining heavily outside.A. not to leave; becauseB. not leave; becauseC. not leave; because ofD. not to leave; because of( )12. The sick boy needs_______ at once.A. to be operatedB. to operateC. to operate onD. to be operated on( )13. The doctor_______ on the man and_______ saved his life.A. did a operation; /B. did an operation; wasC. operated; /D. operated; was( )14. Most cases of blindness_______.A. can be prevent or cureB. can prevented or curedC. can be prevented or curedD. can be preventing or curing( )15. Finish your homework first, then you'll_______ play basketball with your partners.A. canB. be able toC. ableD. could( ) 16．The new CD so well that it out in all the shops．A．is sold；sells B. sells；sells C. is sold ; is sold D．sells; is sold( ) 17．The charity homeless people food and clothes．A．provides；for B．provides；with C．offers；for D．offers; with ( ) 18．一What about taking a taxi to the cinema?一I can not it．Let’s take the subway instead．A．choose B．pay C．cost D．afford( ) 19．When the big ship “Titanic” fell down into the sea，there were over 2，200 people. And only about 700 of them survived．A．in board B．on the board C．on board D．in the board ( )20．The weather was bad．But they still decided to with their work．A．carry off B．carry on C．carry out D．carry二、完形填空Mr. Chen is a farmer who 1 in western China with his wife and two sons. One year ago. he discovered that he had cancer. The doctor told him that he needed an operation at once. And he said the operation would 2 thousands of yuan. It was too much money for Mr. Chen and his wife. They had no job and 3 their sons were at school. The situation seemed 4 .Two weeks later, however, Mr. Chen got some good news. He was told about a health care project which provides medical treatment 5 poor patients in western China. They need to pay only half the cost or even less.Thanks to the project and the kindness of his family and neighbours, he was able to receive an operation just 6 to prevent the illness from getting worse. Now he has returned to his family.The 7 of this health care project is to improve the situation for poor people in western China. So far, the project has helped more than 5, 000 people 8 medical aid. The Chinese government is 9 working together with other countries and international organizations to do this. They hope to develop a new health care model 10 China. As our country develops, we must remember the responsibilities(责任) of caring for the weakest members.( )l. A. live B. lives C. are living D. is living( )2. A. pay B. spend C. cost D. pay( )3. A. all B. both C. neither D. either( )4. A. hopeful B. harmless C. harmful D. hopeless( )5. A. in B. with C. for D. on( )6. A. in time B. on timeC. at the same timeD. for the first time( )7. A. chance B. advice C. goal D. dream( )8. A. accept B. accepted C. received D. receive( )9. A. too B. also C. either D. as well( )10. A. to B. at C. for D. in三、阅读理解AIt was the Greek shopkeeper who taught me about the power of being kind.In 2008 I left Spain to study alone in London. My parents had to bring up my three younger sisters and two younger brothers, so I found three part-time jobs to pay for my studies. I worked early mornings and late nights, so I was tired, really tired, all the time.Unfortunately, I got a cold and had a very high fever. Because I had spent all my free timeworking since I came to London. I hardly took part in any activities and I had no friends. Besides, I was too shy to communicate with others and ask others for help. After sleeping on the sickbed for two days, I went out to get some food. Normally, I went to the supermarket, but this time I went into the Greek shop, a small corner shop, because it was closer.I picked up some food and gave it to the shopkeeper, who asked me, "You look terrible, my boy! You are not feeling well, right?"I said "Yes" in a low voice.She pointed at the salami(腊肠) and bread I was buying and offered, "I can make you a sandwich, so you don't have to do it yourself. "I nodded without saying a word.So, she made the sandwich and asked me to wait a moment. She went into the back room and came again with a bowl of hot soup."It will warm you up, " she said with a friendly smile.What really warmed me up was not the soup. It was her smile that told me she cared me. Her kindness reminded me of my mother.I had been quite shy, but from that day on, I did not let shyness prevent me from communicating with and being kind to others. Now I work in a children's hospital in Africa. I love my work and people around me. I always bring my smile and kindness to them.( )1. When did the writer leave for London?A. In 2003.B. In 2009.C. In 2008.D. 10 years ago.( )2. What can we learn about the writer and his family?A. His parents could not afford his studies.B. There are five kids in his family.C. The writer is the youngest child in the family.D. In 2008 the writer left London to study in Spain.( )3. What happened to the writer?A. He lost his part-time jobs.B. He had an argument with his friends.C. He got a cold and had a very high fever.D. He was not popular at his school.( )4. What did the shopkeeper not do for the writer?A. She made the sandwich.B. She cooked a bowl of hot soup.C. She made some bread.D. She sold him some salami.BThe bank of England is making plans to introduce plastic banknotes to the UK.Paper notes, meaning pieces of paper money, have been used in England for more than 300 years, but replacing them with plastic ones could be better.Plastic notes were first introduced to Australia back in 1988. Since then other countries, including Romania, Vietnam, Mexico and Malaysia, have also begun using money made in this way.Fans of water sports, such as surfing, find this type of money more useful and Easier, as they can take it with them in the water and won't worry that it will fall apart. It is also good for people who by mistake put clothes in the washing machine with a note in the pocket !It is more hygienic (clean and free of bacteria) than paper money as it absorbs less bacteria(the simplest and smallest form of plants, some of which cause disease). And it is stronger. This means it lasts longer. According to a survey, a usual 5 note in the UK lasts around six months,while the $ 5 Australian bill lasts for an average of 40 months.A downside of plastic cash is that it costs more money to produce. Cash and money- counting machines will also have to be adapted to accept the new money.It is expected that the Bank of England, who hopes to start printing plastic notes from 2015, will introduce the money slowly, using the most common notes first.( )5. Which country was the first to use plastic notes?A. The UK.B. Romania.C. Vietnam.D. Australia.( )6. You can put the sentence "Besides being waterproof, there are other good effects of using plastic notes instead of paper ones. " at the beginning of_______.A. Paragraph 3B. Paragraph 4C. Paragraph 5D. Paragraph 6( )7. Which is NOT the reason why the UK wants to use plastic notes instead of paper ones?A. They take up less space.B. They are stronger.C. They don't let water through.D. They are more hygienic.CYou want to know about my staying in America, right? Well, to tell you the truth, it is really an eye-opening experience to study here.In China, I had English classes five times a week since fifth grade. However, I didn't know how different textbook English could be from everyday English until I came to Hotchkiss School, Connecticut.When I first studied English, I was told to say, "I am fine. " when people say "How are you?" But in the US, I found that people say, "I am good" or "I'm tired".One day, someone greeted me with "What's up?" It made me confused. I thought for a moment and then smiled because I didn't know what to say. Since then, I have discovered more and more differences between Chinese and US cultures.To my surprise, US girls spend a lot of time in the burning sun to get a tan(晒黑). However, in China, girls try every possible way to get their skin paler, or "whiter".I was also surprised by how hardworking US students are. In China, schoolwork is almost everything, so we study hard and that's it. But here, a "good" student gets good grades, does a lot for the public and plays sports or music.The kids here are so talented, I am starting to be sorry that I gave up playing the piano at an early age and that I have never thought about sports.( )8. What does the word "confused" in the fourth paragraph mean in Chinese?A．困惑B．憧憬C．悲痛D．后悔( )9.A good US student spends his or her time_______.A. only in doing homeworkB. on studies, sports or music and public workC. only in working for the publicD. only on sports or music( )10. Which of the following is NOT true?A. The writer is now in US.B. American girls love to have white skin.C. US students are talented and hard working.D. The writer regrets that he gave up playing the piano.DAlmost every Chinese person can recite the two lines of the famous poem, "Every grain on the plate comes from hard work(谁知盘中餐, 粒粒皆辛苦)." But sadly, many of us don't actually get the real meaning of these lines: Don't waste food.A CCTV program, News One Plus One, reported that the food Chinese people throw away every year is enough to feed 200 million people for a year.Do we have too much food? Of course not. According to the UN World Food Program, there were 925 million hungry people around the world in 2010, especially in developing countries. Six million children die of hunger every year.Chinese people are well known for being hospitable(好客的) and generous. Many even feel that they lose face if their guests have eaten all the food on the table.Luckily, a number of people have realized the importance of saving food. Last November, Li Hong, a waitress in a restaurant in Nanjing, got fired because she took some leftover food home for her son Many people stood by her side and criticized(批评) the waste of food.What should we do in our daily lives to waste less food? Here are some tips:·Do not order too much in a restaurant. Only order as much as you want to eat. If you cannot eat all the food you ordered, take the rest of it home.·Don't be too picky(挑剔的) about food. Some food may not taste great, but your body needs it.·Keep an eye on what food you have at home. Don't buy too much, especially for vegetables and fruit.( )11. How many people were hungry in the world in 2010 according to the UN World Food Program?A. 200 million.B. Six million.C. 925 million.D. 625 million.( )12. What does the writer want to show us through Li Hong's story?A. Many Chinese restaurants waste a large amount of food.B. Many Chinese people are kind-hearted and ready to help the weak.C. Chinese people feel that they lose face if their guests eat all the food.D. Many Chinese people don't agree with the behavior of wasting food.( )13. The underlined word "leftover" means_______ in Chinese.A. 过期的B. 剩余的C. 腐烂的D. 难吃的( )14. According to the passage, we shouldn't waste food because_______.A. food comes from very hard workB. six million children die of hunger every dayC. there is enough food to feed all the peopleD. Chinese are hospitable and generous( )15. Which of the following is a good way to save food?A. Ordering more than you need at a restaurant.B. Taking home restaurant leftovers.C. Not knowing what you already have at home when shopping.D. Not eating the food you don't like even if it's healthy.四、词汇检测1．The old man looked a bit (苍白的) than usual after the operation．2．We should do something to prevent the (扩散) of this kind of disease．3．I enjoy sports very much，(特别) tennis．4．I feel very (自豪) to be a member of the team．5．A lot of (官员) from Japan visited the biggest factory in our cityyesterday．6．The nurses job is to take care of their (病人) with kindness．7．How many (基本的) skills should we learn before we leave the primary school?8．The (秘书) should get training before starting her work．9．Please have a (检查) and make sure you have finished filling the form．10．What’s the (事情) with you? You seem not good．11．Carl wants to have further __ (教育) abroad but I’m afraid she can’t afford that．12. I wonder if most writers will reply to their (读者) letters．五、动词填空1. The Olympic Games_______ (hold) every four years.2. -Excuse me. Look at the sign "No Photos". -Sorry, I -_______ (not notice) it.3. Project Hope _______ always_______ (support)by those kind people.4. Many doctors on the flying hospital fly to poor areas_______ (treat) people with eye problems.5. The doctors_______ (operate) on the girl when we got to the hospital.6. -What's your plan for the coming holiday?-I _______ (visit) Beijing if possible.7. Bamboo _______ usually _______ (use) to make kites during Qing Dynasty.8. I'm not familiar with this place. It's the first time I _______ (be) here, you know.9. -When _______ we_______ (meet) tomorrow? -I have no idea.10. -Who_______ (organize) this fashion show?-Millie does.六、句子翻译1．由于大雪，他们停止了踢足球。

嘉X外国语学校2017-2018学年八年级下期入学考试英语试卷A 卷（共1OO 分）第一部分听力（共30 小题；计30 分）一、听句子，根据所听到的内容选择正确答语。

每小题念两遍。

（5分）() 1. A. To Sanya B. With my friends C. It was wonderful () 2. A. For 2 hours. B. Twice C. Once a week() 3. A. Study medicine B. Be a teacher C. Nothing() 4. A. Yes, there will B. No, it won’t C. Yes, there will be () 5. A. All right. B. No problem C. Never mind二、听句子。

选择与所听句子内容相符的图片，每小题念两遍。

（5分）6. 7,. 8. 9. 10.三、听对话，根据对话内容及问题选择正确答案。

每小题念两遍。

（10分，每个1分）( ) 11. A. London. B. Hong Kong. C. We don’t know. ( ) 12.A. Movie club B. Art club C. Music club( ) 13.A. Yes B. No C. Maybe( ) 14.A. Orange juice B. Apple juice C. water( ) 15.A. Friends B. Classmates C. Strangers( ) 16.A. Fine B. Rainy C. Sunny( ) 17.A. Has a cold B. Has a headache C. Has a toothache ( ) 18.A. Tony B. Lily C. No one( ) 19.A. Lucy B. Tom C. Kate( ) 20.A. Strict B. Kind C. Serious四、听短文，根据短文内容选择正确答案。

成都嘉祥外国语学校八年级下期数学试题(总6页)-CAL-FENGHAI.-(YICAI)-Company One1-CAL-本页仅作为文档封面，使用请直接删除成都嘉祥外国语学校初2019届八年级下期期末考试试题（满分150分，120分钟完卷）A 卷（100分）一、选择题（每小题3分，共30分）1.下列四个图案中，是轴对称图形，但不是中心对称图形的是 ( )A 、B 、C 、D 、 2.函数y =+中自变量x 的取值范围是（ ） A ． x ≤2 B ． x ≤2且x≠1 C ． x ＜2且x≠1 D ．x≠13.如果点P (m ，1+2m )在第二象限，那么m 的取值范围是 （ ）A ．210<<mB ．021<<-mC ．0<mD ．21>m 4.已知⎩⎨⎧==21y x 是方程组⎩⎨⎧=--=+021by x y ax 的解，则b a +＝( ) A ．2 B ．－2 C ．4 D ．－45.下列命题中的假命题是（ ）A ．一组邻边相等的平行四边形是菱形 B ． 一组邻边相等的矩形是正方形C ． 一组对边平行且相等的四边形是平行四边形D ．一组对边相等且有一个角是直角的四边形是矩形 6.如图，点O 是矩形ABCD 的对称中心，E 是AB 边上的点，沿CE 折叠后，点B 恰好与点O 重合，若BC =3，则折痕CE = （ ）A ．2 3B ．332C ． 3D ．6 7. 如图，正方形ABCD 的对角线AC ，BD 相交于点O ，DE平分∠ODA 交OA 于点E ，若AB=4，则线段OE 的长为（ ）A ．B ．4﹣2C ．D ．﹣2 8.已知一次函数y =kx +b （k ≠0）图象过点（0，2），且与两坐标轴围成的三角形面积为2，则一次函数的解析式为C D O （第7题图）10 3O 2 4 S (吨) t (时) （第9题图） A ．y = x +2 B ．y = ﹣x +2 C ．y = x +2或y =﹣x +2 D ． y = - x +2或y = x -29．某储运部紧急调拨一批物资，调进物资共用４小时，调进物资2小时后开始调出物资（调进物资与调出物资的速度均保持不变）．储运部库存物资S(吨)与时间t(小时)之间的函数关系如图所示，这批物资从开始调进到全部调出需要的时间是（ ）A ．4小时B ．4.4小时C ．4.8小时D ．5小时（第10题图） 10.如图，点P 为定角∠AOB 的平分线上的一个定点，且∠MPN 与∠AOB 互补，若∠MPN在绕点P 旋转的过程中，其两边分别与OA 、OB相交于M 、N 两点，则以下结论：（1）PM=PN 恒成立；（2）OM+ON 的值不变；（3）四边形PMON 的面积不变；（4）MN 的长不变，其中正确的个数为（ ）10. A ．4 B ．3 C ．2 D ．1二、填空题（每题4分，共16分）11.因式分解22216)4(x x -+12.一次函数y 1=kx +b 与y 2=x +a 的图象如图，则kx +b ＞x +a ＞0的解集是13.在平行四边形ABCD 中，AD=13，∠BAD 和∠ADC 的角平分线分别交BC 于E ，F ，且EF=6，则平行四边形的周长是14.如图，在菱形ABCD 中，AB=4cm ，∠ADC=120°，点E 、F 同时由A 、C 两点出发，分别沿AB 、CB 方向向点B 匀速移动（到点B 为止），点E 的速度为1cm/s ，点F 的速度为2cm/s ，经过t 秒△DEF 为等边三角形，则t 的值为 ．（第13题图） （第14题图）三、解答题(共54分)：15.(每小题5分,共15分)（1）计算|121|)331)(331()2()31(01-++-----π （2)解不等式组⎪⎩⎪⎨⎧-+≥--13214)2(3x x x x ，并写出不等式组的非负整数解。

2019-2020学年八年级英语Unit7 单元测试卷Ⅰ. 根据句意及首字母提示完成句子（10分）1. He is a careful boy. He often writes c in his exercise book.2. The tofu s terrible, but tastes delicious.3. I live far away from the city. I live in a v .4. England is an English-speaking country in E .5. —May I i you to our Mid-autumn Festival?—I’d love to.6. It’s said that most results are usually w the effort.7. —Have you h of Yao Ming?—Yes, of course. He is a famous person.8. Every minute has 60 s________ .9. Wang Nan is a s pingpong player. She got quite a few gold medals.10. We are students and we should o all the rules at school.Ⅱ. 单项选择（15分）（）1.—Your MP3 is so nice. How much is it?—It’s ￥500.A. costB. payC. worthD. take（）2. Do you know ?A. whom she is looking afterB. who is she lookingC. who is she looking afterD. whom she is looking（）3. Jim decides swimming.A. goingB. to goC. for goingD. go（）4. Try to finish the work with money and people.A. less; moreB. less; fewerC. fewer; lessD. more; less（）5. I’m very with what at the meeting.A. pleased; he saidB. pleased; will he sayC. pleasant; he will sayD. pleasant; he spoke（）6. There is a table two over there.A. toB. atC. forD. on（）7. —How many_______ bread in a sandwich?—There are two.A. pieceB. pieces ofC. piecesD. piece of（）8. Daniel Igali is_______kind that we like him very much.A. workB. suchC. soD. very（）9. We must remember_______in the sun.A. to readB. to not readC. don’t readD. not to read（）10. This is Li Weikang_______, from Beijing, China.A. speakB. speakingC. sayingD. talking（）11. Maria is new here. So she has_______friends.A. a fewB. fewC. a littleD. little（）12. I’m afraid I have_______to see a film with you tonight.A. timeB. no timeC. no timesD. times（）13. We are going to have a test, all the students are busy_______for it.A. preparingB. prepareC. to prepareD. prepared（）14. Titanic is an_______movie. We are all_______in it.A. interesting; interestingB. interested; interestedC. interesting; interestedD. interested; interesting（）15. We came to Kangkang’s party last night. We enjoyed_______.A. usB. oursC. ourselvesD. ourselfⅢ. 句型转换（10分）1. I think they will need to cook some soup.（改为否定句）I they will need to cook some soup.2. Michael cooked more finely than any other student in his class.（同义句）Michael cooked in his class.3. It will take about twenty minutes to prepare your dishes.（就划线部分提问）will it take to prepare our dishes?4. Your friends have no time to come.(改为反意疑问句)Your friends have no time to come, ?5. It’s very kind of you.(改为感叹句)you are!6. Do you study hard? My mother often asks me.(改为宾语从句)7. She did nothing this morning. (同义句).She this morning.8. You mustn’t take more food than you need.(改为祈使句)more food than you need.9. What snack do you like best?（同义句）your snack?10.I’d like some Chinese fried rice.(改为一般疑问句)some Chinese fried rice?Ⅳ. 补全对话（10分）A: Are you free next Saturday?B: 1 Why?A: Would you like to come over to my house for a party?B: Oh, I’d love to. 2A: We have our party at half past five. 3B: I have lots of schoolwork to do. I must do my schoolwork first. 4 May I come then?A: Sure, well. Would you like dumplings?A: OK. We’ll cook dumplings with seafood.B: 5 See you then.A: See you.1. 2. 3. 4. 5.Ⅴ. 完形填空（10分）One morning, an old woman was carrying a big basket of cabbages on her hand to the market. She hoped to 1 them to the people from town.The mountain road was narrow (窄的) and the old woman was walking 2 , because she did not want to have 3 and lose her cabbages.Suddenly she 4 a loud bell and a bicycle came round the corner. It passed her and went very fast 5 the hill. The old woman had to jump to one side of the 6 so quickly that the basket of cabbages nearly fell into the valley (山谷).She looked up and saw that a young boy was on the bicycle. He was 7 on without even looking round to see 8 the old woman was all right.The old woman began to shout,“Come back, young man! You dropped something!”When he heard this, the boy stopped the bicycle so suddenly that he 9 fell off. Then he turned and began to 10 the bicycle back up to the hill.“What is it?”he asked,“What did I drop?”“Little boy,”the old woman answered,“you dropped our manners (礼貌)”.（）1. A. send B. sell C. give D. take（）2. A. carefully B. clearly C. politely D. hardly（）3. A. a match B. a rest C. an accident D. a talk（）4. A. hit B. made C. found D. heard（）5. A. over B. up C. to D. down（）6. A. road B. street C. town D. hill（）7. A. driving B. riding C. running D. walking（）8. A. how B. why C. whether D. when（）9. A. usually B. hardly C. easily D. nearly（）10. A. carry B. catch C. push D. giveⅥ. 阅读理解（15分）(A)What do you like? Different people like different things. Some people like loud music, other people don’t. They say they are too noisy. They like soft music. Many people like sports like ball games, but they do not all like the same sports.In some countries, cricket is a very popular sport. In others it is not popular at all. No one plays it and few people watch it on TV. The World Cup is very popular. Millions of people watch the games on TV. But some people don’t like sports. They just like to watch other people playing.Different people like different foods. Some people do not like meat. They eat most kinds of fruit and vegetables. Some people do not like potatoes and bread. They prefer rice or corn.Not everyone likes the same colours. Most people have a favourite colour. Some people like bright colours. Others prefer pale colours.The world is an interesting place because we all like different things.( )1. What’s the main idea of this passage?A. People all like the same thing.B. Different people like same things.C. People all like different sports.D. Different people like different things.( )2. Which sentence is true?A. Everyone likes sports.B. Not many people like sports.C. Most people don’t like sports.D. Lots of people like sports.( )3. How many people watch the World Cup on TV?A. Most people.B. Hundreds of different people.C. Millions of people.D. No one at all.( )4. What do people who don’t like meat eat?A. Mostly potatoes and bread.B. Mostly fruit and vegetables.C. Mostly rice and corn.D. Mostly potatoes and corn.( )5. Which sentence is true?A. Most people have a favorite colour.B. No one likes bright colours.C. Everyone likes bright colours.D. Most people prefer pale colours.(B)Mr. Smith was angry with his wife, and she was angry with his husband. For many days they didn’t speak to each other at all.One evening Mr. Smith was very tired when he came back from work. So he went to bed soon after supper. Of course, he didn’t say anything to Mrs. Smith before that Mrs. Smith did some washing. When she went to bed, she found a piece of paper on the small table near her bed. On the paper were words.Mother:Wake me up at seven in the morning.Father When Mr. Smith woke up the next morning. It was nearly eight. He saw the piece of paper on the small table near his bed. He took it and found these words.Father:Wake up. It’s seven.Mother 根据短文内容，判断正（T）误（F）。