限时训练17-18
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2013届语文一轮复习基础限时训练:语言文字运用之字形篇181.下列词语中,没有错别字的一项是()A.缄默满腹经纶桀傲不驯无所不用其极B.畸形醍醐贯顶义愤填膺英雄所见略同C湎怀如火如荼轻歌曼舞口惠而实不至D发轫前倨后恭悬梁刺股巧伪不如拙诚【答案】D【解析】略2.下列词语中,没有错别字的一组是()A.分量咏叹调一记耳光化干戈为玉帛B.掉包大石墩珠心之论识时务者为俊杰C.倏忽自助餐大才小用磨刀不误砍柴工D.婉然滞纳金躬逢其盛挟天子以令诸侯【答案】A【解析】略3.下列词语中,没有..错别字的一项是()A.嗔目蛮夷震慑峥荣岁月B.箕踞峥嵘扼腕头晕目眩C.笙萧浮藻窒息星晖斑斓D.凄惋牌匾忸怩天仑之乐【答案】B【解析】略4.下列词语中没有错别字.....的一组是()(2分)A.喋血绯红吓马威拾人牙惠远见卓识B.暇想气馁扫描仪共商国是名门旺族C.耸峙脉搏亲合力鞭辟入理和颜悦色D.拖沓凝练协奏曲言简意赅味同嚼蜡【答案】D【解析】A下马威拾人牙慧 B、遐想名门望族 C、亲和力鞭辟入里5.下列句中有错别字的一项是(3分)()A、至于这一回在弹雨中互相救助,虽陨身不恤的事实,则更足为中国女子的勇毅。
B、看着这种饲养小姑娘营利的制度,我不禁想起孩子时候看到过的船户养墨鸦捕鱼的事了。
C、这里阳光明媚,绿树成阴,在集中营大门附近,孩子们在追逐游戏。
D、他的声音沉着而有力,有时又是宏亮而激亢。
【答案】A【解析】略6.下列词语书写有误的一项是()A.签署造诣阜盛信口雌黄B.馥郁酒盅煊赫推心至腹C.缜密平添城垣精妙绝伦D.粉末贸然自诩休戚与共【答案】B【解析】略7.下列词语书写全都正确的一项是()A.酒撰朔风辍学金榜提名B.通霄传颂泅水人才汇萃C.拌倒租赁惆怅鸦鹊无声D.妨碍穹窿缉拿唉声叹气【答案】D【解析】略8.下列各组词语中,没有错别字的一组是( )A.寒碜力能扛鼎垂手可得俗不可奈B.虐杀食不厌精突如奇来寥若晨星C.肆意举止安详方枘圆凿烘云托月D.编撰好景不长捍然不顾以逸待劳【答案】C【解析】A项中“垂”—“唾”,“奈”—“耐”;B项中“奇”—“其”;D项中“捍”—“悍”。
高一英语限时训练17一.单项选择。
1. He decided not to attend her birthday party, _____ he had been invited to.A. even ifB. becauseC. so ifD. as though2. The speaker _____ from his seat and _____ his voice, looking excited.A. raised; raisedB. rose; raisedC. rose; roseD. raised; rose3. The secretary worked late into the night, _____ a long speech for the president.A. to prepareB. preparingC. preparedD. was preparing4. He is not easy to get along with, but the friendship of his,________, will last forever.A. once gainedB. to be gainedC. after gainedD. while gained5. In my opinion, what he told us just now about the matter doesn’t make any_______.A. meaningB. ideaC. senseD. point6. The murderer was brought in, with his hands______ behind his back.A. be tiedB. having tiedC. to be tiedD. tied7. As we have known from the map of the world, this is ______.A. twice as large an island as thatB. twice as larger as that islandC. as twice as that oneD. twice as a large island as that8. I was about to say it _____ you interrupted me.A. asB. whileC. untilD. when9. He remained _____ in face of danger.A. quietB. calmC. silentD. still10. What a pity _____is _____you didn’t arrive by daylight.A. there; becauseB. it; thatC. he; whenD. that; for11. We are ready to do ______ the country wants us to do.A. whatB. whichC. no matter whatD. whatever12. _______ is a fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. It13. we can’t get seems better than we have.A. What; whatB. What; thatC. That; thatD. That; what14. Can you make sure ______ the gold ring?A. where Alice had putB. where did Alice putC. where Alice has putD. where has Alice put15. It’s generally considered unwise to give a child ________ he or she wants.A. howeverB. whateverC. whicheverD. wherever16. ---I drove to Zhuhai for the air show last week.---Is that _________ you had a few days off?A. whyB. whenC. whatD. where17. Perseverance is a kind of quality---and tha t’s ______ it takes to do anything well.A. whatB. thatC. whichD. why18. Meeting my uncle after all these years was an unforgettable moment, ______ I will always treasure.A. thatB. oneC. itD. what19.A cook can be immediately fired if he is found ______ in the kitchen.A. smokeB. smokingC. to smokeD. smoked20. It was a pity that the great writer died _____ his work unfinished.A. forB. withC. fromD. of21. -----How far apart do they live?----- _____ I know, they live in the same neighborhood.A. As long asB. As far asC. As well asD. As often as23. -----Will you attend the evening party? ------No, _____.A. even if invitedB. if invitedC. after invited toD. until invited二.单词拼写1.She g_________ at her watch and left in a hurry.2.She leaned over and ____________(低声说)something in his ear.3. A team of 200 ___________(自愿者)arrived in the disaster-stricken area.4.The number of the students in the area has been__________(减少).5.According to the weather f_______, it’s going to snow tomorr ow.6.We’re a_________ about Mary’s safety, when she was doing the rescue work in Japan.7.Let’s _____(分析) the problem and see what went wrong.8.If you v__________ to do something, you offer to do it without being forced to do it.9.These two events are r_________ to each other.10.I made a suggestion but they i______ it.三.完成句子。
高三英语晚自习限时训练一、阅读理解AExperience College at HarvardChallenge yourself in college-level academics. Meet new friends from around the world. Strengthen your college application. And, build important life skills that can make your future college experience a success.Pre-College ProgramAn intense and exciting glimpse into the college experience. During this intensive two-week program, you will take the first steps toward your college j ourney alongside a diverse group of exceptional high school students.• Challenge yourself in a college course taught by Harvard faculty and affiliates, without the pressure of grades.• Engage with your peers in structured co-curricular activities, college readiness workshops, and social events.• Two weeks, non-creditSecondary School ProgramImmerse yourself in college life for seven weeks! In this dynamic seven-week program, you can earn college credit while experiencing firsthand what it’s really like to be a college student.• Choose one or two college-level classes that delve deeply into subjects that really excite you and may not be offered in high school.• Prepare for the future as you experience what it’s really like to balance responsibility with independence in one of three program formats – online, commuting, or residential. • Seven weeks, college creditApplication is now open for both high school programs! See program calendars for important dates and deadlines.To get our updates, join our mailing list for helpful information and important deadlines. Start your education journey today!1. What can we learn about the two programs?A.All the learning activities take place online.B.They are required procedures for college application.C.They challenge the students with college-level courses.D.Students can earn college credits after learning the two programs.2. According to this passage, applicants can .A.start to apply for both programs nowB.pay for the program calendars from todayC.apply for the programs throughout the yearD.download a mailing list to get helpful updates3. What is the purpose of this passage?A.To raise money for Harvard Summer Programs.B.To show the diverse courses in Harvard University.C.To share the college learning experience with readers.D.To introduce Harvard Summer Programs for high school students.BOne third of adults over 65 in America have never used the Internet, and half don’t even have Internet access at home. In San Francisco, “the center of tech”, 40% of older adults do not have basic digital literacy skills.This situation is becoming appalling as over 10,000 Americans turn 65 every single day. By 2050,22% of Americans will be 65 or older. Meanwhile, technology is developing very fast. This means that a large number of people will be unable to proficiently use emergent technology.Many people believe that seniors aren’t required to participate in our tech future because they’ll be retired and relaxed soon. But this is the farthest thing from the truth. Baby boomers are currently experiencing a different boom: With more people getting older than ever before, their life expediencies are also increasing dramatically. With medical advancements, the number of American people projected to live into the ir 90’s has doubled since 1965.However, they don’t have strong financial or educational support. This is not a problem; it’s a crisis. More than half of employees over 50 have been laid off in what’s being called ”forced retirement“. And few organizations are actively helping older employees make the transition from full-time jobs to part-time ones. For those fortunate enough to be employed, 3 out of 5 older workers experience prejudice.The easiest solution is to teach digital literacy. If baby boomers want to survive the forthcoming retirement crisis, they should get enough digital knowledge and skills to operate today’s tools and tomorrow’s platforms. With every crisis comes an opportunity. Tutoring, customer service, editing, research, book-keeping, and other virtual assistance-based work open the doors. But again, digital knowledge is first required to live in our high-tech society and gig economy. So try to get more online and navigate the growing number of sites and apps.;4. What does the underline d word “appalling” probably mean in paragraph2? A.Confusing. B.Terrible. C.Controllable. D.Inspiring.;5. What problem may baby boomers face?A.A crisis after retirement. B.Being knocked out in the future. C.Failing to receive good healthcare. D.Tending to double their life expediencies.;6. What is the last paragraph mainly about?A.The features of high-tech jobs. B.The way out for baby boomers. C.Potential industries in the future. D.The importance of developing technology.;7. What does the author advise baby boomers to do?A.Have a good sense of crisis. B.Avoid retiring at an early age. C.Look for many part-time jobs. D.Improve digital literacy actively.CGrowing up as kids we are told to share our toys and not to be selfish. We also live in an age when discussing our feelings is encouraged. But when does it all become toomuch? With new crazes trending all the time, such as dance challenges and wearing a carpet as a dress, the question is: when can sharing become oversharing on social media?“Oversharing” has become associated with social media, but it isn't exclusive to this platform. Imagine you head to a party and meet x k w someone. Within five minutes they have revealed private details about their life. While some of us may try to escape these people, according to marriage advisor Carolyn Cole, this form of oversharing could come from a strong desire to connect with someone. But how does this translate to social media?Dr. Christopher Hand, a lecturer in cyberpsychology (网络心理学),says the more details people disclose, the less sympathy we express when things go wrong. It seems that searching for sympathy by oversharing is generally considered as negative rather than the cry for help it could really be.However, Dr. Hand's research also seems to suggest that the more we post on a platform, the more socially attractive we become-provided that the posts that we bang out are positive. Even back in 2015, Gwendolyn Seidman PhD said that we should avoid complaining and being negative online. We should also avo id showing off, especially about our love lives. It makes sense-if your date is going “that well", would you really have time to share a photo with text?So, how can you know if you are oversharing? Well, why not ask your friends in real life. They would probably be happy to tell you if your posts about your breakfast or your complaints about your lack of money really are too much.;8. What does the underlined word “exclusive" in paragraph 2 mean?A.Unique.B.Similar.C.Relevant.D.Fundamental.;9. Why do some people prefer oversharing at parties?A.To draw others' attention.B.To satisfy others' curiosity.C.To remove negative feelings.D.To develop good relationships.;10. Which of the following may Dr. Hand agree with?A.Sharing more details online can attract more sympathy.B.Oversharing negative experiences is equal to crying for help.C.Sharing negative posts can't help one become socially attractive.D.Oversharing isn't likely to happen online when things go wrong.;11. According to the text, what should be avoided for online sharing?A.Reflecting on past bad manners.B.Showing a great many expensive goods.C.Writing a recipe for a balanced breakfast.D.Recording unforgettable moments with friends.二、七选五阅读For most Americans, the weeks between Thanks giving and New Year’s Day are a time when we’re eating more than we should. 12 The problem wasn’t really thesmall weight increase but that study participants never lost what they put on during the holiday season.So, how do you avoid gaining weight without missing out on the holiday fun? There are several small changes we can make.We have to make time to exercise. With all the shopping that needs to be done and the holiday get-togethers, the first thing cut out of our schedules is often exercise. 13 Exercise not only burns off those holiday treats, it reduces our stress as well.14 Allow yourself to enjoy the foods you really love, but choose wisely and watch your portion (份额) size. If you’ve looked forward to Aunt Sally’s Christmas cookies all year, have one. Mindful eating is the key. Take a small portion of your favorite dessert or high-calorie dish and then enjoy it.Try never to go to a holiday celebration hungry. When you are really hungry, you tend to eat more than you normally would. 15 Then you’ll find it easier to control how much you eat.Weigh yourself at least once a week on the same day, at the same time and on the same scale (称). It’s important to keep in mind that our weight can change because of salt intake or other factors. 16A.Mind your table manners while eating.B.You don’t need to give up all of the holiday goodies.C.However, knowing your weight helps to keep you on track.D.Have a high-fiber, low-calorie snack before attending a party.E.A study found participants gained just over a pound during this time.F.Instead, this is the time we should put working out at the top of our to-do list. G.Researchers suggest people eat smaller meals more times during the course of the day.三、完型填空Sammie Vance approached her principal at Haley Elementary with the idea of installing “buddy benches” into her school playground to help others feel less lonely. The principal 17 of the idea. But wooden benches are18 . Just one would be worth nearly a thousand dollars. However, a bench made of 19 bottle caps would only be around $250. So Sammie 20 others in her community to collect enough caps to make one bench. 21 , she managed to get bottle caps from 50 states. And th us, the initiative of “Sammie’s Buddy Bench Project” was 22 .Pretty soon, Sammie’s Buddy Bench Project began commanding the 23 of several news media. For her amazing efforts, Sammie has been chosen the receiver of several 24 and was 25 one of People magazine’s “Girls Changing the World”. And 26 , more than 200 bottle cap buddy benches have been around at schools and parks across the country, plus Mexico and Australia.This is, of course, not just a beautiful story ab out helping others. It’s also a major win for 27 . It is reported that 1.3 billion bottle caps are used each year. These caps cannot be recycled in the same way along with plastic bottles 28 each has a different melting point, and when they are 29 in, it can ruin an entire batch (一批). And that’s when they get discarded. Millions of caps have been found in our 30 alone, whichcan be devastating to marine life. In fact, it’s one of the leading 31 of death. It’s big carin g hearts like Sammie’s that help our planet heal against damage.17. A.complained B.allowed C.approved D.spoke18. A.costly B.heavy C.productive D.valueless19. A.reviewed B.recreated C.removed D.recycled20. A.kept track of B.reached out to C.sang high praises for D.got rid of21. A.Unfortunately B.Accordingly C.Apparently D.Eventually22. A.born B.promoted C.obtained D.commented23. A.attraction B.attention C.acceptance D.admission24. A.campaigns B.contests C.assemblies D.awards25. A.nicknamed B.introduced C.defined D.named26. A.the other day B.to date C.by then D.until recently27. A.sustainability B.changeability C.adaptability D.visibility28. A.though B.as C.if D.when29. A.combined B.mixed C.involved D.fitted30. A.fields B.walls C.oceans D.rains31. A.explanations B.questions C.ways D.causes四、语法填空阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
人教版六年级下册数学限时训练习9考试范围:全册一、填空。
(每空1分,共 18分)1.今年“五一”黄金周期间某市共接待游客24920300人次,实现旅游收入一百..一十四.亿二千..九百万元.。
横线上的数读作( ),改写成用“万”作单位的数是( )万;波浪线上的数写作( ),省略“亿”后面的尾数约是( )亿。
2.( )÷8=0.75=18÷( )=( )%=()折=()(填成数)3.在比例尺1:4000000的地图上,量得甲和乙两地的距离为4厘米,甲和乙的实际距离约为( )千米。
4.5米长的一根木头平均截成9段,平均每段占全长的( ),其中的2段长( )米。
,这个自然数是( )。
5.一个自然数比它的倒数多2236.数A=2×3×7,数 B=2×3×5,A和B的最大公因数是( ),最小公倍数是( )。
7.一个零件长为3毫米,把它画在20∶1的图纸上,应画( )厘米。
9.一个圆柱和一个圆锥等底等高,已知圆锥的体积比圆柱少1.2cm³,圆柱与圆锥的体积和是( )cm³。
10.一个圆柱的底面半径为5cm,侧面展开后是一个正方形,这个圆柱的体积是( )。
二、判断。
(正确的打“√”,错误的打“×”)(每题1分,共5分)1.假分数的倒数小于或等于1。
( )2.正方形的面积与它的边长成正比例关系。
( )3.旋转和平移不改变图形的形状和大小,只改变图形的位置与方向。
( )4.表面积相等的圆柱,体积也一定相等。
( )5.一件商品,先提价5%,再降价5%,现价低于原价。
()三、选择。
(将正确答案的序号填在括号里)(每题2分,共10分)A.3 : 1B.1 : 3C.1 : 22.一幅地图的比例尺是 1:100,表示把图上距离( )就是实际距离。
A.扩大 100倍B.缩小 100 倍C.不变3.圆柱的底面积扩大为原来的2倍,高扩大为原来的4倍,则体积扩大为原来的( )。
第18课时中国近现代社会生活的变迁(时间:45分钟满分:100分)一、选择题(本大题共12小题,每小题5分,共60分)1.(改编题)《中国社会通史·民国卷》:“民国光复,罐头之品,番餐之味,五方来会,烦费日增。
”这反映出当时的中国()。
A.人们已完全接受了西方的生活方式B.政府公开赞成西方生活方式的推广C.西方生活方式与传统习俗无法融合D.部分民众已经能认同西方生活方式解析注意题干材料中的“罐头”“番餐之味”等关键信息,由此可以看出部分民众已经认同西方生活方式,故选D。
A、B、C三项均与史实或材料不符。
答案 D2.(2013·苏北四市模拟) 1927年12月1日,蒋介石与宋美龄在上海举行婚礼,右图是当时婚礼的照片。
从这张照片当中我们可以看出()。
①当时的中国社会已经有人穿西装礼服②当时中国已经出现了西化的“文明婚礼”③中国社会已经彻底摒弃传统婚礼④当时中国的高官显贵都不愿意穿长衫、旗袍A.①②③B.①②C.②③D.①④解析本题主要考查近代服饰及婚姻礼俗的变化。
由婚礼中蒋介石的穿着可判断当时已开始穿西装礼服,由婚礼仪式可知这是西化的“文明婚礼”,①②正确。
③错在“彻底”摒弃上,④中的“都不愿意穿长衫、旗袍”在图中得不到体现。
答案 B3.(原创题)武昌起义后,各地革命党人即动员群众剪辫。
1912年3月,南京临时政府大总统令内务部:“兹查通都大邑,剪辫者已多。
至偏乡僻壤,留辫者尚复不少。
”这从根本上说明()。
A.民主共和深入人心B.政体已经发生改变C.专制思想深入人心D.民主政治生活开始解析辫子是专制的象征,脑袋里的辫子不好剪反映的是专制思想的根深蒂固。
故C项正确。
答案 C4.(2013·盐城摸底)19世纪末,上海“凡物之贵重者时皆谓之洋。
高楼曰洋楼,彩轿曰洋轿,挂灯曰洋灯,火锅曰洋锅。
……大江南北,莫不以洋为尚……”(张岂之主编《中国历史·晚清民国卷》)下列对此理解正确的是()。
2021届淳中高三语文(yǔwén)限时训练题一一、〔18分,每一小题3分〕1.以下词语中加点字的读音完全一样的一组是〔〕A.俊.秀逡.巡开工..峻.峭疏浚. B.刨.床炮.烙冰雹.咆.哮皮袍.C.浦.口果脯.黄埔.花圃.铺.子 D.嶙.峋遴.选麒麟.磷.肥鳞.片2.以下各组词语中没有错别字的一组是〔〕A.扫瞄涣然冰释以老卖老树倒猢狲散B.吃俭用绿草如茵解铃还须系铃人C.濒临平心而论安排就绪胳膊钮不过大腿D.证券伸张正义乌烟障气捅了马蜂窝3.依次填入以下各句横线处的词语,恰当的一组是〔〕①广阔的教育工作者要用极大的耐心去教育学生,不能因为你们的忽略而__了他们的自尊心。
②惩治腐败,打击贪赃枉法,___HY分子是当前政法工作的首要任务。
③世界各国之间发程度的不平衡,___表现为一种经济差距和技术差距,___表现为知识差距和教育差距。
A.伤害揭露既/也B.损害揭露不仅/而且C.损害揭露既/也D.伤害揭露不仅/而且4.以下各句中加点(jiā diǎn)的成语或者熟语使用不恰当的一项是哪一项〔〕A.嚼过的馍不香......,你假如真有才能,也搞出点自己的东西来,那才叫人佩服。
B.继马德里遭HY袭击以后,伦敦可能将成为“基地〞组织的下一个袭击目的,这种说法绝不是危言耸听....。
C.七股大水,从水库的桥孔跃出,飞短流长....,仿佛七幅闪光的黄锦,直铺下去。
D.这姑娘是个好姑娘,人勤快,针线锅灶都能拿得起...,跟邻居没有一句...,放得下闲话。
5.以下各句中没有语病的一句是〔〕A.从1月27日广西发生第一起高致病性禽流感疫情,到3月16日最后两个疫区解除,在蔓延亚洲的禽流感疫情中,中国走过了不平凡的50天。
B.中国恢复行使对的主权后,特区事务完全是中国内政,任何外国和国际组织均无权干预,这是国际社会公认的事实,也是国际法的准那么。
C.西班牙首相萨帕特罗中选后举行的第一次记者招待会上就明确表示,新政府将调整对HY和欧盟的外交政策,抛弃如今的“亲美疏欧〞政策,恢复并加强与法国和德国等欧洲国家的“亲密传统友好关系〞。
核按钮客观题限时夺分训练第18卷文科数学答案大家好!欢迎来到核按钮客观题限时夺分训练第18卷文科数学,这次我们来给大家分享一下知识点的掌握和解题技巧,希望大家在这个过程中能够提高自己的答题能力,欢迎大家多多关注我!下面让我们一起来看看吧!这题是很简单但要得分必须掌握答题技巧。
很多人一看到这里就开始头疼了。
不知道如何下手。
你需要什么方法?1.多写。
做一题就总结。
看自己错在哪?哪里需要加强?为什么?再多写多练习。
反复练习。
就是一个知识点掌握的更牢固一些,这样才能有更多的分。
2.认真审题。
当你在做题的时候。
不能因为一看就懂了,或者想不起来。
就忘了题目中要求判断题,选择题之类的。
你应该仔细读题。
弄清题意之后再做下面那道题。
看看题目有没有要求看清是什么题目。
3.读懂题目。
看不懂题目,没有任何方法,其实可以从以下几个方面去考虑。
①.文字是如何表述的。
②.这个选项包含哪些信息。
③.用什么方法去找信息。
④.从哪些方面来看不合理。
⑤.看不懂还可以怎么办。
4.学会解题方法。
我们必须要学会换位思考。
题目只有一个答案。
如果你想解题却找不到思路。
你必须换个角度去思考这个问题。
如果你不换位思考就会直接把这道题做错。
解题还需要方法。
如果你想用排除法把这个题做对。
其实这个过程中可以让自己感觉到是有问题的。
5.不要自己瞎琢磨。
当你看完题后你的思维被框住了。
那么问题就来了。
想一个什么是怎么做出来的?你自己去想就行了。
当然不能在脑海中形成一个固定的思维。
如果想很多。
那么你不会做这些题。
这些题太难了。
一定要多做题再去总结思路。
6.分析错题。
发现错误原因,自己是否把题干读懂了?还是题目不会写?或是错别字多吗?或者计算错误吗?还是运算不正确?自己分析出错的原因,主要是基础知识掌握不扎实。
找出错误的知识点:考点、题型、考查点、设问、例题、解题步骤等。
2018届高三一轮复习语言文字运用(高考第三大题)限时训练(一)【本考案共1页,共5题,共20分,考试时间25分钟】17.下列各句中加点成语的使用,全都不正确的一项是(3分)( ),①就在两年前,韩国总统朴槿惠还在说有关自己的前助手“幕后干政”的报道是无中生有....纯属谣言,但如今“闺蜜干政”事件却被坐实。
而倒闭的民营书店不同,这家书店较早引入了资本运作,为其在全国②与大多数因惨淡经营....扩张市场助力,但此举也让它承受了更大的压力。
,他以美国新孤立主义、民粹③美国总统竞选终于落幕,地产大亨特朗普让全世界大跌眼镜....主义理念成功击败了原有体制和精英主义的代表希拉里。
④俄罗斯总统专机在途经瑞士领空时,曾遭到该国三架战机的包围拦截,并在几分钟内被抵,险象环生。
近跟踪,场面波诡云谲....⑤有媒体称,印度对中国阻止其加入核供应国集团的指责显得目光如炬,这只会给世界留下....情绪化且缺乏战略眼光的负面印象。
⑥关闭核电站必然要遗留大量核废料,既要关闭核电站,又不愿把核废料存放在自己的家园,。
这个死结使得德国反核能运动进退维谷....A.①③⑥B.②④⑤C.②③⑤D.①④⑥18.下列各句中,没有语病的一句是(3分)( )A.逃亡到欧洲边境的叙利亚难民不少被堵在边境线上,夜晚和衣睡在地上,盖得除少数人有毛毯可充当被子外,大多数人挤在一起御寒。
B.自从中央下定反腐决心、决定“老虎苍蝇一起打”之后,各级政府官员作风大有改观,但仍有不少贪腐分子不知收敛,依然我行我素。
C.据业内人士保守估计,中国现在每年有超过1000万人整形,女性比例为83%,男性比例为17%,而整个行业的年增速则超过30%以上。
D.会议指出,文艺工作者不仅要具有广阔的视野和博大的胸怀,而且和自己学术观点不一样的同行也要互相学习,切磋技艺,取长补短。
19.对联是中华传统文化的瑰宝,对联的写作要求上下联字数相等,平仄相协,音韵和谐,内容相关。
提升训练(十八)[限时:30分钟得分: ]一、[2021·河北]完形填空Every school has rules for students to follow. However, some students may see the 1 as a way which teachers control them. Sometimes, they’re unhappy and even feel 2 . Well, if you think your life is hard, you might think about the 3 in ancient times. For some of them, life was really hard.In the old days, people believed that teachers had to be very 4 and had the right to punish the students. Parents didn’t mind if teachers punished their children when their children didn’t do what they were 5 to do. Often, the stricter a teacher was, the more parents thought he or she was a good teacher.In fact, following school rules can be very important. For example, running in the hallways could cause a student to 6 . It may hurt himself or another person. Following the rules can also help the students in the classroom to learn 7 difficulty. In class, a teacher may ask students to raise their hands 8 they speak. If someone speaks out of turn, other students might not be able to hear the teacher 9 . School rules can help students prepare for their own futures as well. When they 10 and go out on their own, they’ll soon find that they still need to follow rules.Rules make the world much better. If there are no rules, life will be meaningless and in disorder.( )1.A.rules B.excusesC.factsD.examples( )2.A.tired B.angryC.excitedD.good( )3.A.doctors B.parentsC.teachersD.students( )4.A.kind B.cleverC.strictD.careful( )5.A.told B.heardC.invitedD.watched( )e out B.fall downC.move onD.pass by( )7.A.about B.fromC.exceptD.without( )8.A.because B.thoughC.beforeD.unless( )9.A.clearly B.luckilyC.quicklyD.politely( )10.A.hurry up B.look upC.grow upD.dress up二、[2021·福建]阅读理解Ten-year-old Orion Jean has always known that kindness is important. He often practiced it by volunteering with his family. Last year, after entering the National Kindness Speech Competition, he became crazy about it. Now he works to spread kindness everywhere through projects that help others. He calls his campaign(活动) the Race to Kindness.When a teacher told him about the competition, Orion had only 24 hours to write, memorize, and record his speech. In it, he talked about the importance of kindness. “Kindness is like spreading hugs around the world.” Orion said. He encouraged listeners to join him in doing small, kind acts for others.Orion’s speech won the competition. He used his $500 prize to support his first Race to Kindness project, a toy drive for a local children’s hospital. He collected619 toys. After that, Orion wanted to make an even bigger impact(影响). Working with others, he packed meal bags for people in need with a kind message in each bag. Orion also organized several events in his community. In all, he collected more than 100,000 meals!Orion believes that everyone wins this race. He says, “If you’re kind to someone else, it can make their day brighter and inspire them to pass on kindness. And then it just grows and grows, and it can make the world a better place.”1.Why did Orion start his campaign? ( )A.To spread kindness.B.To win the competition.C.To take part in a race.D.To volunteer with his family.2.What does the underlined word “it”in Paragraph 2 probably refer to?( )A.The competition.B.The world.C.His speech.D.His campaign.3.Which of the following has something to do with Orion’s campaign? ( )A. B. C. D.4.What did Orion do for his campaign? ( )A.Joined in a competition.B.Recorded his speech.C.Built a hospital.D.Collected over 100,000 meals.5.What’s the main idea of the last paragraph? ( )A.Practice makes perfect.B.One is never too old to learn.C.Believing in yourself is the first step to success.D.Roses given to others, sweet smell left in your hand.三、任务型阅读Drones(无人机) are like planes, but come in many shapes and sizes. They have no pilots and are controlled from outside the drones. During these years, they have been used to attack(进攻) enemies or move goods(货物) in dangerous areas.Now small drones are a part of people’s lives. For example, people use drones to take photos or make videos. Besides, a drone delivery(投递) service has proved successful.Online store JD can use drones to deliver small packages(包裹). It has built several drone stations so that it can load(装载) and deliver its packages.Drones have made our shopping experience different. We can order a new coat in the early morning and it will be delivered before we finish breakfast.Bizzby Sky, a UK company, has created a delivery service for small goods. Open a smartphone app(应用软件), enter your address, set a time and pay enough money for the delivery service. Then in minutes, a drone will do tasks for you.However, any drone company needs government permission(允许) to fly its drones in many countries. We believe we will see more and more drones with goods fly in the sky very soon.1.Drones have been used in some fields, such as attacking enemies or in dangerous areas.2.Drones can be used to and a drone delivery service has proved to be another success.3.Several have been built by JD to have its packages loaded and delivered.4.With a smartphone app, a drone will for you.5.From the passage we can see that today’s shopping experience is the old one because of drones.四、[2021·部分区二模]综合填空根据短文内容及首字母提示,填写所缺单词,使短文意思完整。
限时训练17【时间:15分钟】
1、如图,,A B 为相距2km 的两个工厂,以AB 的中点O 为圆心,半径为2km 画圆弧。
MN 为圆弧上两点,且,MA AB NB AB ⊥⊥ ,在圆弧MN 上一点P 处建一座学校。
学校P 受工厂A 的噪音影响度与AP 的平方成反比,比例系数为1,学校P 受工厂B 的噪音影响度与BP 的平方成反比,比例系数为4。
学校P 受两工厂的噪音影响度之和为y ,且设AP xkm = 。
(1)求()y f x = ,并求其定义域; (2)当AP 为多少时,总噪音影响度最小?
限时训练18【时间:20分钟】
1、已知椭圆O 的中心在原点,长轴在x 轴上,右顶点(2,0)A 到右焦点的距离与它到右准线的距离
之比为
23. 不过A 点的动直线1
2
y x m =+交椭圆O 于P ,Q 两点. (1) 求椭圆的标准方程;
(2)证明,P Q 两点的横坐标的平方和为定值;
(3)过点,,A P Q 的动圆记为圆C ,已知动圆C 过定点A 和B (异于点A ),请求出定点B 的坐标.
N
限时训练17
1. 解:(Ⅰ)连接OP ,设
则,……….1分
在△AOP 中,由余弦定理得,
在△BOP 中,由余弦定理得,…………4分
∴,则,…………….6分
∵,则,∴,∴,
∴。
………………………………8分
(Ⅱ)令,
∴,…………………………..10分
由,得或t=-10(舍去),………………..12分
当,函数在上单调递减;
当,函数在上单调递增;……………………
∴当时,即时,函数有最小值,也即当AP 为(km)时,“总噪音影响度”最小.……………………………………………………………14分限时训练18
18.解:(1)设椭圆的标准方程为()0
1
2
2
2
2
>
>
=
+b
a
b
y
a
x
.由题意得
2
3
,2=
=e
a.……2分
3
=
∴c, 1
b=, ……2分∴椭圆的标准方程为1
4
2
2
=
+y
x
.……4分
(2)证明:设点)
,
(
),
,
(
2
2
1
1
y
x
Q
y
x
P
将m
x
y+
=
2
1
带入椭圆,化简得:0
)1
(2
22
2=
-
+
+m
mx
x○1
∴2
1212
2,2(1)
x x m x x m
+=-=-,……6分∴222
121212
()24
x x x x x x
+=+-=, ∴P,Q两点的横坐标的平方和为定值4.……7分
(3)(法一)设圆的一般方程为:220
x y Dx Ey F
++++=,则圆心为(,
22
D E
--),
PQ中点M(
2
,
m
m
-), PQ的垂直平分线的方程为:m
x
y
2
3
2-
-
=, ……8分
圆心(
2
,
2
E
D
-
-)满足m
x
y
2
3
2-
-
=,所以
3
22
E
D m
-=-○2,……9分
圆过定点(2,0),所以420
D F
++=○3,……10分
圆过
1122
(,),(,)
P x y Q x y, 则
22
1111
22
2222
0,
0,
x y Dx Ey F
x y Dx Ey F
++++=
++++=
⎧
⎨
⎩
两式相加得:
2222
12121212
20,
x x y y Dx Dx Ey Ey F
++++++++=
22
2212
121212
(1)(1)()()20
44
x x
x x D x x E y y F
++-+-+++++=,……11分
12
y y m
+=
, 5220
mD mE F
-++=
∴○4.……12分
因为动直线
1
2
y x m
=+与椭圆C交与P,Q(均不与A点重合)所以1
-
≠
m,
由○2○3○4解得:
3(1)3335
,,,
42222
m
D E m F m
-
==+=--……13分
代入圆的方程为:22
3(1)3335
()0
42222
m
x y x m y m
-
++++--=,
整理得:2233
5333
()()04
22422
x y x y m x y +-
+
-++-=,……14分 所以:22
3350,4223330,422
x y x y x y ⎧+-+-=⎪⎪⎨⎪+-=⎪⎩……15分 解得:0,1,x y =⎧⎨=⎩或2,0x y =⎧⎨=⎩(舍).
所以圆过定点(0,1).……16分
(法二) 设圆的一般方程为:22
0x y Dx Ey F ++++=,将m x y +=
2
1
代入的圆的方程: 024522=+++⎪⎭
⎫
⎝⎛+++F mE m x E D m x ○
5.……8分 方程○1与方程○5为同解方程.22122(1)542
E m mE F
m D m m ++-+=+=
, ……11分 圆过定点(2,0),所以024=++F D , ……12分
因为动直线m x y +=2
1
与椭圆C 交与P,Q (均不与A 点重合)所以1-≠m . 解得: 3(1)
3335
,,4
22
22
m D E m F m -=
=
+=--,……13分 (以下相同)。