七年级第一学期期中试卷(C卷)

＝18﹣6
＝12．
【点睛】本题考查了有理数的加减混合运算，含有乘方的有理数四则混合运算，熟练掌握运算顺序是解题的关键．
19．(1)0；（2）﹣4ab2，-1.
【分析】（1）直接利用有理数乘方运算法则计算得出答案；
（2）首先去括号，进而合并同类项，再把已知代入求出答案．
【详解】解：（1）（﹣1）2019﹣8÷（﹣2）3－4×（﹣ ）3
(2)当a＝2cm，b＝4cm，c＝1.5cm时，两个纸盒共用料多少？
23．已知|x|＝3，|y|＝7．
(1)若x＜y，求x﹣y的值；
(2)若xy＞0，求x+y的值；
24．某同学做一道数学题：“两个多项式 、 ， ，试求 ”，这位同学把“ ”看成“ ”，结果求出答案是 ，那么 的正确答案是多少？
25．“分类讨论”是一种重要数学思想方法，下面是运用分类讨论的数学思想解决问题的过程，请仔细阅读，并解答题目后提出的四个问题．
【详解】解：将1295330000用科学记数法表示为1.30×109．
故选A．
【点睛】此题考查科学记数法的表示方法．科学记数法的表示形式为a×10n的形式，其中1≤‖a‖<10，n为整数，表示时关键要正确确定a的值以及n的值．
6．B
【详解】确定单项式的系数时，把一个单项式分解成数字因数和字母因式的积，是找准单项式的系数的关键，单项式－ 的系数为-2
∴2（a+b）-3ab=2×3-3×（-1）=9
故答案为：9
【点睛】本题主要考查了整体代入思想，转化所求代数式是解题的关键．
14．-1
【分析】直接利用互为相反数的定义得出a+b=0，进而化简得出答案．
【详解】解：∵实数a，b互为相反数，
∴a+b＝0，

2021-2022学年度七年级上学期语文期中试题本试卷满分120分，考试用时120分钟。

一、基础与运用(22分)1.下列词语中加点字的读音完全正确的一项是( C )(2分)A.窼．巢（kē）霎．时(chà) 粗犷．（guǎng ）菜畦．（qí）B. 发髻．（jí）高邈．（miǎo）莅．临（lì）蝉蜕．（tuì）C. 屋檐．（yán）整宿．（xiǔ）搓捻．（niǎn）脑髓．（suǐ）D. 吝．啬（lìng）黄晕．（yùn）盔．甲（kuī）宿儒．（rú）2.下列词语书写正确的一项是( D )(2分)A、捶打嘹亮分岐各得其所B、憔悴脊梁祷告翻来复去C、鉴赏莲篷遮蔽油然而生D、淅沥瘫痪奥秘喜出望外3.下列句中加点的成语使用不正确的一项是（ C ）(2分)A.家乡的荔枝花开了，荔枝树上蜂围蝶阵，这些小精灵呼朋引伴．．．．，吮吸着仙露琼浆。

B.这荒园虽人迹罕至．．．．，却是野花野草和各种鸟雀的天堂。

C.他博学多闻，口才绝佳，经常显出一种咄咄逼人．．．．的气势，让人敬佩！D.这些词使整个世界在我面前变得花团锦簇，美不胜收．．．．。

4.结合语境，将下列句子填入横线处，最恰当的一项是（ C )(2分)我们把自己的头脑，变成他人思想汽车驰骋的高速公路，却不给自己的思维，①我们把自己的头脑，②，却不给自己的发现，留下一个小小的储藏盒。

A.①留下一条细细的羊肠小道②变成收藏古今图书、储存海量知识的图书馆B.①留下一扇小小的窗户②变成收藏古今图书、储存海量知识的图书馆C.①留下一条细细的羊肠小道②变成搜罗最新倍息、网罗八面来风的集装箱D.①留下一扇小小的窗户②变成搜罗最新信息、网罗八面来风的集装箱5.下列文学常识表述正确的一项是（ B ）（2分）A、古人称谓有谦称和尊称的区别，比如“愚”是谦称自己，“令爱”是对别人称自己的女儿。

B、古人常以“而立”“不惑”“知天命”“耳顺”代称三十岁、四十岁、五十岁和六十岁C、泰戈尔，泰国诗人，诺贝尔文学奖获得者，主要作品有《飞鸟集》《吉檀迦利》等。

2023-2024学年度第一学期期中试卷七年级数学（120分钟满分:150分一、选择题（本大题共有8小题，每小题3分，共24分.在每小题所给出的四个选项中，恰有一项是符合题目要求的，请将该选项的字母代号填涂在答题卡相应位置上）1.下列四个选项中的数不是分数的是（）u−;u B;u; D.80%2.京杭大运河是中国古代劳动人民创造的一项伟大工程，它南起杭州，北到北京，全长约1800000m，将1800000用科学记数法表示应为（）A.0.18×107;B.1800×103;C.18×105;D.1.8×1063.下列各组式子中是同类项的是（）A.3y与3x；B.-xy2与yx2；C.a3与23；D.6与−4.下列等式变形正确的是（）A.如果2x＝-2，那么x＝-1;B.如果3a-2＝5a，那么3a+5a＝2C.如果a＝b，那么a+1＝b-1;D.如果6x＝3，那么x＝25.下列说法中正确的是（）A.单项式−B的系数是-3;B.-xyz2的次数是2C.2x3-8x2+x是二次三项式;D.单项式-2xy3的系数是-2，次数是46.实数a、b在数轴上的对应点的位置如图所示.若实数c满足-a＜c＜a，则下列判断正确的是（）A.b+c＜0；B.|b|＜|c|；C.a+c＞0；D.ac＜07.如图，“日”字形窗框的铝合金总长是9.7m，窗的高比宽多0.6m.则窗框的宽为（）A.1.4m；B.1.7m；C.2m；D.2.3m8.如图，将一个边长为1的正方形纸片分割成7个图形，图形①面积是正方形纸片面积的，图形②面积是图形①面积的2倍的，图形③面积是图形②面积的2倍的，…，图形⑥面积是图形⑤面积的2倍的，图形⑦面积是图形⑥面积的2倍.计算++B+…+的值为（）u B B;B B B;u B B;u B B二、填空题（本大题共有10小题，每小题3分，共30分.不需写出解答过程，请把答案直接填写在答题卡相应位置上）u−的相反数是_____.10.比较大小:-|-2|_____-(-3)(用“>”“<”“=”填空)11.若＝是关于x的方程2x-m＝0的解，则m的值为_____.12.在数轴上，设A点表示-3，B点与A点相距3个单位长度，则B点表示的数为_____.13.若|a|＝2，-b＝3，c3＝8，且abc＜0，则a+b-c的值等于.14.若（m+1）|U-4＝0是关于x的一元一次方程，则m＝_.15.在如右图所示计算程序中，在“输入”中填写适当的数:_____.16.某数学小组在观察等式ax3+bx2+cx+d＝（x+1）3时发现:当x＝1时，a+b+c+d＝（1+1）3＝8.现在请你计算:8a+4b+2c＝_____.17.已知x，a，b为互不相等的三个有理数，且a＞b，若式子|x-a|+|x-b|的最小值为5，则（b-a）2-a+b的值为_____.18.对于三个数a，b，c，用M（a，b，c}表示这三个数的平均数，用max （a，b，c）表示这三个数中最大的数.例如:M{-1，2，3}＝−rr＝，max{-1，2，3}＝3，如果M（3，x+1，2x-1）＝max{2，2x-6，-x+5}，那么x＝_____.三、解答题（本大题共有10小题，共96分.请在答题卡指定区域内作答，解答时应写出必要的文字说明、证明过程或演算步骤）19.（本题10分）计算:（1）23-（-8）+（-5）;（2）-32÷（-2）2×|-|×6+（-2）3.20.（本题10分）解方程:（1）-2x+6＝3（x-3）;（2）B+−K＝u21.（本题8分）先化简，再求值3a2b-[ab-2（2ab-a2b）]-3ab，其中|a-2|+（b+1）2＝0.22.（本题8分）观察下列式子，定义一种新运算:1⊕3＝12×3-3×1×3+3＝-3;3⊕(-1)＝32×（-1）-3×3×（-1）+（-1）＝-1;（-5）⊕4＝（-5）2×4-3×（-5）×4+4＝164.（1）根据上面式子规律，请你想一想:a⊕b＝_____:（用含a、b的代数式表示）:（2）若P＝m⊕，＝⊕4m，试比较P与Q的大小,并说明理由.23.（本题8分）已知，数a，b，c在数轴上的位置如图:（1）判断正负，用“＞”或“＜”连接:a+c_____0，b-a_____0.2a-c_____0.（2）化简|a+c|-|b-a|+|2a-c|24.（本题8分）某小组6名同学参加一次知识竞赛，共答20道题，每题分值相同，答对得分，答错或不答扣分，下面是前5名同学的得分情况（如表）:（1）表中的m＝_____________________，n＝_____;（2）该小组第6名同学说:“这次知识竞赛我得了0分”，请问他的说法是否正确？如果正确，请求出这位同学答对了多少题:如果不正确，请说明理由.25.（本题10分）[观察下列等式]×＝−，H ＝−，H ＝−，将以上三个等式两边分别相加得:×+×+×＝−+−+−＝−＝.[尝试计算]:（1）H +H +H +…+2B×2B ＝;（2）−B −B −B −B −B −B ＝;[运用说明]:（3）设＝++…+2B +2B .试判断S值是大于1，还是小于1.请说明理由.序号答对题数答错或不答题数得分118284217m 76320010041919251010n26.（本题10分）定义:若x+y＝m，则称x与y是关于m的好数.（1）若5与a是关于2的好数，则a＝_____;（2）若b＝x2+6x-1，c＝x2-2（x2+3x-1）+2，判断b与c是否是关于3的好数，并说明理由:（3）若e＝kx-1，d＝x-4，且e与d是关于3的好数，若x为正整数，求非负整数k的值.27.（本题12分）曙光双语学校10月19日举办体育文化艺术节活动，准备单位圆珠笔，双色圆珠笔、三色圆珠笔三种圆珠笔共1000支作奖励（每种圆珠笔都要有），其中双色圆珠笔的单价比单色例珠笔的单价贵0.2元，买5支双色圆珠笔和8支单色圆珠笔共需要6.2元.（1）问双色圆珠笔和单色圆珠笔的单价分别是多少元？（2）若三色圆珠笔市场上根据球珠直径有三个级别，学校只能从中选择现在学校用3480元去购买这三种圆珠笔，且单色圆珠笔和三色圆珠笔的数量是相同的，应该选择哪种级别的三色圆珠笔比较合适？购买方案是什么？请说明理由.（3）若要求购买三色圆珠笔的数量是单色圆珠笔的一半，单色圆珠笔和双色圆珠笔单价不变，其中三色圆珠笔单价为a元，在总数量不变的前提之下，无论这三种圆珠笔的数量如何分配，总费用始终不变.求此时a的值和总费用.28.（本题12分）[阅读理解]若数轴上点C到点A的距离是点C到点B的距离2倍，就称点C是[A，B]的“好点”.例如，如图1，点A表示数-1，点B表示数2.表示数1的点C是[A，B]的“好点”:又如，表示0的点D就不是[A，B]的“好点*，但点D是[B，A]的“好点”.[知识应用]（1）如图2，M、N为数轴上两点，点M所表示的数为﹣7，点N所表示的数为2.①点E、F、G表示的数分别是-4、-1、11.其中是[M，N]″好点“的是点;②在数轴上，数_____和数_____所表示的点都是[N，M]的好点;③现有动点P从点N开始出发，以2个单位每秒的速度向左运动，当点P运动时间t为何值时，M是[P，N]的“好点”？[拓展延伸]27数轴上点A、B、C表示的数分别为a、b、c，满足（a-b）（b-c）＞0且a-c＞0，点C是[A，B]的“好点”.问点A是[C，B]的“好点”吗？写出你的结论并说明理由.。

进华中学2024学年第一学期七年级英语期中试卷(90分钟完卷)Part Two Phonetics, Vocabulary and GrammarII. Choose the best answer(10%)21. Which of the following underlined parts is different in pronunciation from others?A. troublesomeB. throughC. roughD. enough22. Please give me_______ honest answer about what happened during the meeting.A. aB. anC. theD. /23. Lucy introduced an old friend of _______ to me.A. sheB. herC. hersD. herself24. This table is made _______ high-quality(优质的)wood and is very expensive.A. byB. ofC. fromD. in25. She _______ much time to think about this question because it is easy.A. doesn't needB. needn'tC. don't need to haveD. don't need26. They often have difficulty_______ a decision on important matters.A. makesB. to makeC. makingD. made27. The company has employed(聘用)more than_______ workers since it started.A. thousands ofB. thousandC. five thousand ofD. five thousand28. After moving to a new city, Tom felt very_______ without his old friends.A. lonelyB. friendlyC. aloneD. lovely29. The story tells us_______ trouble.A. how to doB. what to deal withC. what to do withD. how to do with30. ---Would you like me to go shopping with you?--_______A. Yes.B. Yes, I'd like to.C. That's all right.D. Yes, please. That would be great.Ⅲ. Complete the following passage with the words in the box. Each word can only be used once. (8%)A. comfortablyB. noteC. communicateD. firmly AB. serviceIan Smith is one of many customers at the local cafe in a small town in the USA. However, Ian isn't like the other customers-he can't hear anything.Penny, a new waitress, wanted to do something to make Ian stay in the café more _______(31)so she spoke with other waiters about Ian, learning that they always did what they could to give him the best_______(32).But Penny wanted to do more. She spent her nights learning American Sign Language(手语)so that she could better _______ (33)with Ian. One day, she wrote him a little _______ (34)saying, “I've been learning ASL, so I can serve you better. ”Ian was so happy about this, so he sent it on the Internet to share with his friends. It was then sent again and again by many other people. He didn't expect it.The next morning, Penny heard about it when her manager praised her.A. entertainB. chanceC. simpleD. trust AB. practicalIn a busy city, Emily always wanted to have her own bakery. She believed that every pastry (面饼)should have a special taste. Her_______ (35)ideas helped her find a good location and the best ingredients. In fact, she knew she must win _______ (36)from her neighbours. At first, it was not easy, but every happy customer brought a _______(37)for more. Over time, her little bakery became a favourite place, and it was known for tasty treats and a friendly feel. Emily's dream of sharing her love for baking came true. It showed that with hard work and self-belief, even _______ (38)dreams can become real.IV. Complete the sentences with the given words in their proper forms. (8%)39. They will have a party for Ben's _______ birthday. (nine)40. The puppy _______heavily after running around the yard. (breath)41. How _______ the show was on the playground. (fun)42. Her speech was very _______ and moved everyone in the audience. (power)43. He is a hardworking and _______ teacher in our school. (respect)44. People like those _______ new handbag collection very much. (design)45. Could you _______ tell me the story again?(possible)46. Always remember you are_______ than you believe. (bravery)V. Rewrite the sentences. (10%)47. The old farmer grew tomatoes in the back garden. (改为否定句)The old farmer _______ _______tomatoes in the back garden.48. Her arrival created a surprise at the party. (改为一般疑问句)_______ her arrival _______ a surprise at the party?49. Sara spent the whole afternoon doing the project. (保持句意不变)_______ _______Sara the whole afternoon to do the project.50. How do you like these solar cells?(保持句意不变)What do you _______ _______ these solar cells?51. go out, why, to, the fresh air, for, not, a walk, enjoy(连词成句)Part Three Reading and WritingVI. Reading comprehensionA. Choose the best answer (6%)52. Kitty is good at working with numbers. Which activity will be her best choice?A. Spelling Bee.B. English Cafe.C. English Singing Contest.D. All of them.53. How many days will a helper work?A. One.B. Two.C. Five.D. Seven.54. Which of the following are NOT the duties of student helpers during the English Week activities?A. Take down scores.B. Make some snacksC. Perform on the stage.D. Show students the way to the stage55. Simon wants to be a helper so he signs up online. How can he know the result(结果)?A. By checking the school's emails.B. By getting a phone call.C. By waiting for the letter.D. By checking the school website.56. The meeting for student helpers will probably be on _______.A. May 3rB. May 6hC. May 16"D. May 23rd57. The text is written to _______.A. teach students how to become a volunteerB. ask for volunteers to help with the English WeekC. show what student helpers will doD. introduce the English WeekB. Choose the words or expressions and complete the passage. (6%)As the sun set on this evening, my thoughts head towards the big game tomorrow. I wonder if we will win. I _______ (58)hope so although I know it isn't all about winning.Our coach says even if we don't win, we can win for ourselves by having good sportsmanship (体育精神). I think he is right. I want to be nice to the team tomorrow _______(59)so many of my friends are on that team.It is going to be sunny tomorrow. I wonder if it will be so hot that we will have a _______ (60)time playing well. It seems like cold weather is better for exercise, yet the fall always seems to have quite a few hot days.Tomorrow night the new action film will come out. I can go to the cinema with Mum and Dad if I have enough_______(61)after the game. I'm sure I will!I can't wait to get popcorn with butter!It is relaxing to just sit and watch a film. I hope it is really good and long. I love long films and I can lose myself in different worlds and _______(62)the worries of the real one.Tomorrow will be a day filled with difficulties and opportunities, but I am _______ (63)to face them all with a smile on my face and a heart full of gratitude (感激).58. A. certainly B. exactly C. hardly D. finally59. A. if B. while C. because D. so60. A. great B. long C. hard D. busy61. A. feeling B. trouble C. heart D. energy62. A. meet B. solve C. make D. forget63. A. sorry B. ready C. curious D. possibleC. Fill in the blanks with proper words. (6%)Are you a movie fan?Do you know how to make a film?On a film s_______(64), many people work together to make a movie come to life. Each person has an important job to do.You may think of actors or actresses first. They entertain the audience by a _______(65), singing or dancing. They often have to arrive e _______ (66)to remember lines, and then try their best to perform well for each scene.The director is the leader of the film. A director usually teaches the actors on how to perform their roles and make important decisions about how each scene should look and f _______ (67). The director works closely with all the other people to make sure everything goes according to plan. Photographers need to record the best scenes on camera. They decide the best angles(角度)and lighting to use. They must be c _______ (68)in art and also be good at photography.As you can see, it's never e _______ (69)to make a film. Thanks to all the team members, they make the film the best one for you.D. Answer the questions (6%)70. Are IoT devices very useful in our life?71. How can we control loT devices?72. What has happened to the number of IoT devices?73. If you plan to travel in the mountain, what IoT devices will you use?74. What may be the danger of using IoT devices?75. Please think of another another tip to use IoT devices safely and fill in the blank.VIL. Translate the following sentences into English by using the words given in brackets. (6%)76. 我们最好不要把自己和别人做比较。