期中复习(3)

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2020人教版七年级下册英语期中综合复习卷(三) (有答案)

人教版七年级下册英语期中综合复习卷（三）一．单项选择（20分）( )1．—Can I go swimming with you,Mom?—No,you .You must do your homework first.A. won’tB. can’tC. canD. don’t( )2．Please come and join .You can join club.A. us;usB. our;usC. us;ourD. our;our( )3．—________do you take a shower, Tony?—At 8：30 in the evening.A. What timeB. How manyC. How longD. How much ( )4．—What sport do you like ________，basketball，soccer or tennis, Mary?—Tennis.A. goodB. wellC. betterD. best( )5．—Do you walk to school or ride a bike to school? —.A. I walk to schoolB. Yes,I doC. No,I don’tD. Yes,you do ( )6．Don’t go the grass.And you can the road.A. cross;acrossB. across;crossC. across;acrossD. cross;cross ( )7．—Don’t play basketball in class.—, I won’t do it again.A. Excuse meB. SorryC. Thank youD. You’re welcome ( )8．A lot of good teachers their students.A. are strict withB. is strict inC. are strict inD. is strict with( )9．He can’t,but he often to the beach to play.A. swimming; goB. swim;goesC. swims; goesD. swim; go( )10．Don’t talk eat in class.A. andB. orC. soD. but( )11．—do they kill elephants?—They kill elephants their ivory.A. What;onB. What;forC. Why;onD. Why;for( )12．Koalas are interesting but tigers are really scary.A. a kind ofB. kind ofC. kinds ofD. all kinds of( )13．—My pet dog can walk two legs.What about ?—My pet dog can do it,too.A. in;yourB. in;yoursC. on;yourD. on;yours( )14．Let’s to the park this weekend.A. to goB. goC. goesD. going( )15．Guangzhou is in the ________ of China.A. northB. eastC. westD. south( )16．—Would you like to come with us to the show?— .A. No,not at allB. That’s rightC. Thanks.I’d love toD. You’re welcome( )17．—Are they playing baseball?—They are playing basketball.A. Yes,they are.B. Yes,they do.C. No,they aren’tD. No,they don’t.( )18．The TV show is really .I don’t like it at all.A. interestingB. funC. boringD. exciting( )19．It ________outside now. You'd better take an umbrella with you.A. rainingB. is rainingC. rainedD. rain( )20．—Is Kate eating dinner? —________. She is playing the piano.A. Yes, she isB. No, she isn'tC. Yes, she doesD. No, she doesn't二．完形填空（10分）I work in a school library，and there are many kinds of __21.___ in it，for example，books about English，science，history，music and so on．You ___22.__ do some reading or borrow books from it．But there are some __23.___．You must obey___24.___．When you are reading in the library，you have to __25.___ quiet．Don’t talk loudly or make any noise．You ___26.__ listen to music，either．You can’t take your bags or wet umbrellas into the library．__27.__ or drink in the library．You can borrow books from the library，___28.__ y ou can’t lend（借出）them to __29.___．You have to take good care of（保管）them and return（归还）them on time．If the library books are ___20.___，you have to pay for them．( )21．A. people B. books C. magazines D. newspapers( )22．A. can B. have to C. can’t D. don’t( )23．A. magazines B. rules C. CDs D. questions( )24．A. that B. them C. it D. this( )25．A. be B. are C. / D. have( )26．A. don’t B. can’t C. have to D. can( )27．A. Not eating B. Not eat C. Don’t eat D. Can’t eat( )28．A. but B. if C. when D. where( )29．A. others B. me C. other D. us( )30．A. lose B. lost C. find D. found三、阅读理解（共30分）（A）Elephants have very strong legs.Their legs are like trees.They usually walk slowly because they are so big,but they walk very quietly.Wild elephants living in the jungle(丛林) usually stay together in big ually one old elephant leads them.The others follow their leader.They usually move about at night,looking for food.In the hot daytime,they go to sleep in the cool shade of the trees.Elephants are kind animals.When one of them is hurt and cannot pull itself to its feet,the other elephants lift it up and help it to walk.Some people say that elephants never forget.They remember people who are kind or bad to them. ( )31．Elephants usually walk slowly because .A. they are very bigB. they are quietC. they are very strongD. they want to eat leaves along the way( )32．Wild elephants living usually stay together in big families.A. in the zooB. in the suburbsC. in the jungleD. in the cities( )33．When an elephant is hurt and cannot keep itself to its feet,the others .A. lift it up and help it to walkB. run away as soon as possibleC. kill it immediatelyD. carry it to a safe place( )34．If you hurt an elephant,what may happen when you meet it again five years later?A. It may not remember you and walk away.B. It may kick you or do something to hurt you.C. It may eat the food you give it.D. It may let you take photos with it.( )35．When elephants stay together, .A. not all the elephants follow their leaderB. the youngest elephant leads themC. there is a leaderD. there is no leader（B）Tom has a happy family. There are some rules in his family.●Keep healthyBeing healthy is important.Tom's family play sports for one hour every day.Tom is in the school swimming club.And his parents run every morning.●Evening time is family timeThey can't watch TV or play computer games after dinner.The family usually sit on the sofa and talk.Tom always talks about his school and friends.Sometimes they take a walk together.●Always say “I love you” and “Thank you”Tom says “I love y ou” to his parents in the morning before he goes to school，and in the evening before he goes to bed. His parents say it to him，too. When Tom helps his mother，his mother says “Thank you” as well．They show their love and thanks all the time (一直)．( )36．What club does Tom join?A. The swimming club.B. The running club.C. The tennis club.D. The soccer club.( )37．Tom usually ________ after dinner.A. plays computer gamesB. talks with his parentsC. takes a walk with his parentsD. listens to music( )38．When does Tom say “I love you” to his parents?A. Before he gets up.B. At breakfast.C. In the afternoon.D. Before he goes to bed.( )39．What can we know from the passage(文章)?A. Tom's father doesn't exercise every day.B. Tom can't watch TV at home in the afternoon.C. Tom has many good friends.D. Tom always says “I love you” at home.( )40．The passage mainly(主要地) talks about ________.A. exercise and being healthyB. how to talk with your parentsC. some rules in a happy familyD. showing love and thanks often（C）The Spring Festival is coming.Every Chinese is going back home.Mr.Lin is one of them.Mr.Lin comes from Sichuan and works in Beijing.He is at the train station now.His train leaves at 1:00 a.m.He is sitting on the chair and waiting. He is tired and wants to sleep. But the train station is too noisy. Some people are talking. Some people are eating. Some people are walking around. And there are some babies crying(哭). Mr.Lin looks at his watch.He has to wait for three hours.What a long night!Mr.Lin feels upset.But when he thinks of his parents at home,he feels much better.“I’m back,Mom and Dad,” says Mr.Lin.( )41．Mr.Lin is going home by .A. busB. subwayC. trainD. boat( )42．Some babies are at the train station.A. talkingB. singingC. walkingD. crying( )43．What time is it now?A. 10:00 p.m.B. 1:00 a.m.C. 3:00 a.m.D. 7:00 p.m.( )44．What does the underlined word “upset” mean in Chinese?A. 乐观的B. 心烦的C. 激动的D. 无助的( )45．From the passage,we know that Mr.Lin .A. works in SichuanB. is drinking waterC. likes the Spring FestivalD. wishes to see his parents四、词汇演练，用所给单词的适当形式填空。

六年级上册数学试题-期中复习03：位置与方向人教版(含解析)

小学数学人教版六年级上册期中复习03：位置与方向一、根据方向和距离确定物体的位置（共7题；共44分）1.如果明明家在学校北偏东60°方向150米处，那么学校在明明家________方向________米处。

2.如图，医院在学校________偏________（________）度方向，距学校________千米处。

3.填一填，画一画。

（1）小丽家在广场的________方向________米处。

（2）从广场出发向________方向走________米，就到达柳柳家。

如果每分钟走60米，从广场到达柳柳家需要________分钟。

（3）小军家在广场南偏西40°方向1200米处。

请画出小军家的位置。

4.在下图中按要求确定位置。

李老师家在学校正东方向80m处。

商店在学校北偏西30°，离学校60m处。

5.超市在学校南偏西30°的方向上，那么学校在超市（）的方向上。

A. 东偏北30°B. 西偏南60°C. 东偏北60°D. 西偏南30°6.下图是某街区的平面示意图。

（1）学校位于中心广场________面，大约________千米处。

（2）人民公园位于中心广场南偏东30°约3千米处。

请在图中标出它的位置。

（3）中心广场西面1千米处，有一条商业街与人民路垂直。

在图中画线表示商业街。

7.下面是小强家周围平面图。

（1）新华书店在学校的________偏________ （________）方向________米处。

（2）小丽家在学校的西偏南45°方向1000学校米处，标出小丽家的位置。

[来源:学科网]二、根据方向和距离描述路线图（共7题；共47分）8.看图填空。

某路公共汽车从机场到图书馆的行驶路线是：向________行驶________站到红星广场，再向________偏________行驶________站到动物园，再向________行驶________站到图书馆。

期中复习(三)小数的意义和性质整理复习

（2）（（3）（）＜4.39＜（）＜2＜（））
一、判断（1）小数都比1小。（
×）
（2）小数的位数越多，这个小数越大。（ × ）（3）2．98保留一位小数是3。（ × ）
（4）在小数的末尾添上零或者去掉零，小数的大小不变。
（
）
下面的说法对吗?
⑴3.56精确到十分位是4。
（） ×
⑵6.05和6. 0599保留一位小数都是6.1。(√ ) ⑷5.29在自然数5和6之间,它近似于5 。 (√ ) ⑸0.596保留两位小数是0.6 。
一、想进率；
二、判断乘除；
三、移小数点。
方法：
高到低，×进率。一艘轮船重65吨600千克。低到高，÷进率。 65吨600千克= 65.6 吨 65吨 600千克 =600÷1000=0.6吨
65+0.6=65.6吨
1吨50千克=（ 1.05 2千米450米=（ 2.45
）吨
）千米
3.4平方分米=（ 3 ）平方分米（ 40 ）平方厘米 3平方分米 0.4平方分米 =0.4×100=40平方厘米 8.8平方米=（ =（
0.01里有( 10 )个0.001;
小数与整数一样,相邻的两个计数单位之间的进率都是10。
5.193
5个1 1个0.1
9个0.01
3个0.001
整数与小数读法的不同:
3005 0.3005
三千零五零点三零零五
填空：
2个1，3个0.1，4个0.01，组成（ 2.34）。
十分位上是6，千分位上是5，这个数是（ 0.605 ）。
0.07扩大到原数的（10倍）变成0.7.
1 10缩小到原数的（）变成0.01. 1000

八年级(下)期中复习综合测试(三)

八年级（下）期中复习综合测试（三）听力部分（20分）（略）基础知识运用（25分）Ｉ．从Ａ、Ｂ、Ｃ、Ｄ四个选项中选择最佳答案。

（每小题1分，共15分）( ) 21. If he doesn’t drive me to the train station, I will ______ the train.A. catchB. missC. takeD. get( ) 22. —I heard Tony broke his leg, and he can’t take part in the football match.—____________A. What a pity!B. Really?C. Do you think so?D. Don’t say that.( ) 23. Mrs Green put her car outside the house ____, but the next morning she found it missing.A. at leastB. at firstC. as usualD. as well as( ) 24. — Tomorrow is my birthday. Can you come to my party?—Certainly. It’s a good ____ to make new friends.A. timeB. thingC. chanceD. job( ) 25. — Betty told me the truth that she took away the money in my desk.—Oh, we want her to be _______ girl.A. a confidentB. a cleverC. a quietD. an honest( ) 26. —The dolphin (海豚) is a friendly and helpful animal.—That’s right. My friend dropped into the sea one day, and a dolphin _______.A. bit himB. saved his lifeC. swam with himD. killed him( ) 27. — Why are you unhappy?—My best friend wanted to copy my homework. I ____ him, but he didn’t talk to me again.A. receivedB. refusedC. toldD. accepted( ) 28. If you __ hurry, you will be late for school.A. aren’tB. won’t beC. doD. don’t( ) 29. — What a nice MP3 player! Is it yours?—Y es. I _____ 300 ｙｕａｎon it.A. costB. spentC. paidD. took( ) 30. I can hardly hear the radio. Would you please _____?A. turn it onB. turn it downC. turn it upD. turn it off( ) 31. —I don’t know how to use this machine.—It doesn’t matter. Here are th e _____. A. instructions B. articlesC. documentsD. advertisements( ) 32. — Do you remember ______ Tom went last winner holiday?—Of course I do. He showed me some beautiful photos of Jiuzhaigou.A. whenB. howC. whereD. why( ) 33. — Mum, ___ is my radio?—I put it in your school bag.A. whatB. howC. whoseD. where( ) 34. — Could you please tell me ______?—I live in Guangzhou.A. where do you liveB. where did you liveC. where you liveD. where you lived( ) 35. — Does Ted tell you if he ___ next Sunday?—No, he doesn’t. But if he _____, I’ll give you a call.A. will come; will comeB. comes; will comeC. comes; comesD. will come; comesＩＩ．完形填空。

江苏省盐城市上冈高级中学2021学年高二下学期物理(新高考实验班)期中复习专题训练(3) - 解析版

2019级新高考实验班期中复习专题训练（3）审核：一、单项选择题1．以下说法中正确的是A．紫外线可杀菌消毒是因为它有较强的热效应B．石英的固定频率与温度有关，据此可以制成磁温度计C．光学仪器中用的衍射光栅是在一块很平的玻璃上用金刚石刻出一系列等距的平行刻痕，这些刻痕相当于透光的狭缝，这样就做成了透射光栅；D．当对液晶显示器中液晶施加不同电场强度时，它对不同颜色的光吸收强度不一样，这样就能显示各样颜色答案：D。

2.为了消杀新冠病毒，防控重点场所使用一种人体感应紫外线灯.这种灯装有红外线感应开关，人来灯灭，人走灯亮，为人民的健康保驾护航.下列说法错误的是（）A.红外线的光子能量比紫外线的大B.红外线的衍射能力比紫外线的强C.紫外线能消杀病毒是因为紫外线具有较高的能量D.红外线感应开关通过接收到人体辐射的红外线来控制电路通断答案：A。

3. 下列有关光学现象说法正确的是（）A．甲中荷叶上的露珠显得特别“明亮”是由于水珠将光线会聚而形成的B．乙中将双缝干涉实验中的双缝间距调小则干涉条纹间距变小C．丙中用加有偏振滤光片的相机拍照，可以拍摄清楚汽车内部的情景D．丁中肥皂在阳光下呈现彩色条纹是光的衍射现象答案：C。

4.下列说法正确的有（）A. 未见其人先闻其声，是因为声波波长较长，发生了偏振现象B. 第5代移动通信（5G）采用频段大致分低频段和高频段，其高频段的电磁波信号的传播速度大C. 航天飞机靠近卫星时，卫星接收到飞机的信号频率大于飞机发出的信号频率D. 在“探究单摆周期与摆长的关系”的实验中，测量单摆周期应该从小球经过最高点处开始计时，以减小实验误差【答案】C5.杨氏双缝干涉实验对认识光的本质具有重要的意义。

双缝干涉实验示意图如图所示，用蓝光照射单缝S 时，光屏P上能观察到干涉条纹。

下列措施中能使光屏上条纹间距变宽的是（）A. 改用紫光照射单缝SB. 将单缝S向左侧平移C. 减小双缝S1与S2的间距D. 用蓝光和紫光分别照射S1和S2【答案】C6．（2018•南京四模）下列说法正确的是()A．根据麦克斯韦的电磁场理论可知，变化的电场周围一定产生变化的磁场B．振动的物体通过平衡位置时，其合外力一定为零C．以0.75c的速度靠近地球的火箭向地球发出的光，在地球上测得其速度为cD．照相机镜头呈淡紫色，是光的衍射结果【答案】C7．（2018•南京三模）下列说法正确的是()A．共享单车是“新四大发明”之一，手机和互联网、互联网和单车之间都是通过红外线传递信息的B．我国新型隐形战机20J 由于使用了反射雷达电磁波材料，在雷达屏幕上显示的反射信息很小、很弱，因此很难被发现C．发生沙尘暴时能见度只有几十米，天空变黄发暗，这是由于发生沙尘暴时只有波长较长的一部分光才能到达地面D．当声源相对于观察者运动时，观察者听到的声音的音调一定变高【答案】C8．（2020•江苏一模）下列说法正确的是()A．真空中的光速在不同惯性参考系中都是相同的B．质点做简谐运动时，若位移为负值，加速度一定为正值，速度一定也为正值C．不同色光通过三棱镜，频率越大，折射率越小，偏折角度就越小D．医学上用激光做“光刀”来进行手术，主要是利用了激光的平行度好的特点【答案】A9.如图甲所示，把一平行玻璃板压在另一个平行玻璃板上，一端用薄片垫起，构成空气劈尖，让单色光a、b分别从上方射入，这时可以看到明暗相间的条纹分别如图乙所示．下面说法中正确的是（）A. 干涉条纹中的暗纹是由于两列反射光的波谷与波谷叠加的结果B. 单色光a的光子动量比单色光b的光子动量小C. 若单色光a、b是某种原子辐射而产生的，则对应的能级跃迁可能如图丙所示D. 若单色光a照射某金属能发生光电效应，则改用单色光b照射该金属也一定能发生光电效应【答案】C10.小柯同学在学校里做了“测定玻璃的折射率的实验”，到家里他发现就有一块呈长方体的透明厚玻璃砖，他还找来了一支激光笔、一块泡沫板、一张白纸、几根牙签，就开始做上了。

六年级英语上册人教PEP版期中复习单词专题 (三)

四会词汇
5.evening ['iːvnɪŋ] 晚上; 傍晚考点：① 复数：evenings②this evening今天晚上 ;in the evening在晚上易错：字母e/ng的发音。巧记：e-ven-ing
四会词汇
6.tonight [tə'naɪt] 今晚考点：主要用作为副词、名词，作副词时译为“在今晚，今夜”，作名词时译为“今晚，今夜”。易错：字母o的发音，字母i /gh的发音巧计：to-n-igh-t
Practice
Guess what place it is.
hospital
Practice
Guess what place it is.
cinema
Practice
Guess what place it is.
museum
Practice
Guess what place it is.
post office
四会词汇
lesson ['les(ə)n]课 space [speɪs] 太空 travel ['træv(ə)l] （尤指长途）旅行 half [hɑːf] 一半复数：halves price [praɪs] 价格
四会词汇
Mid - Autumn Festival中秋节 together [tə'geðə] 一起 get together mooncake ['mu:nkeɪk] 月饼 poem ['pəʊɪm] 诗 moon [muːn] 月亮
a.
b.
c.
d.
Exercises 四、按要求写单词。
we 宾格 us
poem 汉译英诗

高二语文上学期期中专项复习3篇(诗歌理解性默写)

班级姓名（1）《无衣》中，描写将士们团结友爱，穿同样战袍的句子是“_______________，_______________”。

（2）《无衣》中，描写君王要发兵了，要修理好戈矛准备战斗的句子是“______________，_____________”。

（3）《无衣》中表现战士们一样仇恨敌人的句子是“___________________”，表现战士们一起行动起来的句子是“______________________”，表现战士们一起上战场的句子是“_____________________”。

（4）《春江花月夜》勾勒出江潮连海，月共潮生的春江月夜壮丽画面的句子是：“_____________________，__________________________。

”（5）《春江花月夜》中清明澄澈的天地宇宙，仿佛使人进入了一个纯净的世界，这就自然地引起了诗人的遐思冥想的句子是：“_________________________？________________________？”（6）《春江花月夜》按照古代传说托鸿雁，鲤鱼捎书带信，但没有用的句子是：“_____________________，_____________________。

”（7）《春江花月夜》写出个人的生命是短暂即逝的，而人类的存在则是绵延久长的句子是“______________________，______________________”，这是诗人从大自然的美景中感受到的一种欣慰。

（8）《春江花月夜》写出江水，天空成一色，没有些微灰尘，只有明亮的一轮孤月高悬空中的句子是“_________________________，_________________________”。

（9）古代诗文中有许多抒发人生短暂的名句，如屈原《离骚》“惟草木之零落兮，恐美人之迟暮”；李白《将进酒》“_____________________，___________________”；苏轼《赤壁赋》“哀吾生之须臾，羡长江之无穷”。

上宝中学学年初三第一学期英语期中复习试卷(三)

2016学年第一学期初三英语期中复习卷（三）number_____________ name________________ sore _____________1.choices:1.look! There is _________army in the square. They are standing _________line.A. a/in B an/in C a/on D an, on2. Avatar is such _______wonderful science movie that I want to see it ______second time.A. a, a B a, the C /, the D. /,a3. The news that they failed their driving test discouraged him, ________?A did theyB didn’t theyC did itD didn’t it4. It’s raining hard outside. Mary will have no choice but __________until it stops.A. waiting B waits C waited D to wait5. That pile on the left are the ones that have been ______ for the library.A. picked up B picked out C picked off D picked on6. personally, I am extremely satisfied with his appearance. Which word has the closest meaning of the underline word?A. very B also C often D too7. Reading some books _________good for all of us, ____________?A. are, aren’t they B is, isn’t it C have, don’t they D has, doesn’t it8. Our classroom is made _____________every day.A. to clean B to cleaning C clean D cleaned9. Mary had to explain it again ______________.A. making her understand B to make herself understandC. making herself understand D to make herself understood10. Use your umbrella to ________you from the rain.A. protect B stop C prevent D keep11. Henry apologized to Ann __________ to her party.A. for not to go B for not going C to go D to not go12. __________is not easy.A. being honesty B run fastC become a useful personD to speak good English13. I really don’t know ___________at the meeting.A. how to speak B how to say C what to say it D how to speak it14. Bob is not very successful __________a singer but he is quite known _________his music.A. for, as B for, to C as, for D. as, to15. I was going to attend Mary’s wedding party, but I couldn’t make it, for my car __________on the way.A. put down B broke out C broke down D put up16. -------We haven’t heard from Jane for a long time.--------What do you suppose __________to her?A. was happening B has happened C to happen D was happened17. Mr. Johnson told me ______________.A. how many times has he been there B where you have goneC. who had broken the window D when did he return18. The elderly ______________in our center.A. is looked after well B is looked good afterC. are taken good care D are taken good care of19. The reason _________she gave for not being present was __________the heavy snow prevented her coming.A. /,because B why, because C /, that D why, whether20. You’d better ________any junk food. I suggest you ________more vegetables.A. not to eat, to have B not eat, haveC not eat, to have D. not to eat , have21. we are all eager to watch the basketball match ___________on television because of Yi Jianlian.A. live B alive C living D lively22. He has seen the film ___________, so he won’t go to the cinema with us.A. some times B sometimes C some time D sometime23. it is awful to walk in the streets when the weather is wet.A. careful B happy C sad D terrible24.The dog _____________a little boy yesterday. You should be careful when you walk to it.A. bited B bit C bitten D biting25. The soldier was praised for fighting _________in battle.A. heavily B timidly C happily D bravely26. Where can I ___________my dollars __________pounds?A. change, with B trade, to C buy, of D exchange, for27. She_________ to find a person who is willing to give blood to her son.A. is expecting B would expect C expected D had expected28. Many streets in Shanghai ___________in the past few years because of the World Expo.A. have widened B have been widened C widened D were widened29. --------- I want to complain about this CD.--------- ___________________A. That’s OK B please say itC what is the problemD sorry, we were busy now30. -----Lisa, let’s go to the airport at once. The plane is taking off.-----_________. We still have 15 minutes left.A. Let’s go B never mind C take it easy D it doesn’t matter31. In my opinion, health is the most important thing. Which of the following is correct for the underlined word?32. He has served the farm faithfully for 20 years. Which of the following is correct for the underlined word?33. it was shocked to see my face on that screen! Which of the following is correct for the underlined word?key: BADBB ABCDA BDACC BCDCB AADBD DABCC BACII.Word Transformation.1.The of the restaurant is of average height.（own）a house in this city is his dream.There was a quarrel about the of the treasure the had found.2.I don’t know whether the medicine is or not.（poison）3. A lot of caught many yesterday .Look，there are different kinds of on sale.4.They thought it that he kept silent,for he used to be talktive.She was too nervous to act .（nature）5.They are the ideas about weather at the meeting.（change）6.I don't think your excuse is . （reason）7.I will be interested to hear your views on the situation here.The teacher is popular with his students for his nice . （person）8.Trees take many years to reach their full .（grow）We are glad to see that girl has up .9.It is our to keep the city clean.（responsible）They are always doing the work ，which makes their boss happy.The father was angry with the boy for his behaviour.10.She always the baby with porridge.（food）I am up with talking to you.You never listen to me.11.Steve Jobs died of a cancer and his made all the world’s Apple fans sad.12.Students should always be to their teachers. （respect）13.I have a friend who always treats me .（faith）14.The flowers need （water）every day.15.The teachers always keep the class .（live）There are no things on the moon.Who is the greatest man in the world?16.We were surprised to see his work.（creation）An artist should beautiful things.Someone with is needed for this job.The will come in an hour.17.The office should be cleaned at once.（mess）18.The past tense of the word “go”can be spelt .（regular）19.The film made the children . （fright）20.The is so clean that everybody wants to live in it.（neighbour）21.I know it is my turn to make a . （choose）I’ve them because of the colours.22.Her fingers were by the dog.Look，the fierce dog is the postman on the leg.23.The travelling cost me a lot.（expensive）24.I am satisfied with the situation. （extreme）25.We must prevent the news from .（spread）26.I can't forget an experience which happened two years ago.He expressed his in the boy's honesty.（believe）27.The waiters all smile at the customers in this restaurant.（cheer）28.You shouldn't be with those .（patient）29.Jenny made about the items she bought yesterday to the manager .（complain）30.There is a volleyball match between and Chinese.（Russia）31.The woman became and at last. （greed）32.Jane suffered great because her shoes was too tight.（comfort）33.Mr.Smith to me for being late with an expression on his face.（apology）III.Sentence Transformation1.Jack can work out his problems alone. （改为同义句）Jack can his problems .2.This is his own restaurant.（改为同义句）This is the restaurant .3.Mary likes keeping pet dogs. her sister.（妹妹也是）4.According to my Mom，keeping pet dogs helps us become responsible people.（改为同义句），keeping pet dogs helps us become responsible people.5.Young people shuold learn how they can look after others.（改为简单句）Young people shuold learn others.Young people shuold learn others.6.The radio needed repairing.（改为同义句）The radio needed .7.She learned to respect all living things by keeping a pet dog.（划线提问）she to respect all living things？8.“Will you help me cook the fish？”Jane said to Peter.（改间接引语）Jane asked Peter help cook the fish.9.Who has feed those birds in the garden? （改为被动语态）those birds in the garden？10.Let us go for a picnic this weekend, ?（反义疑问句）11.he，the way of ，thought,was ，to ，possible , watch , as , relaxing , much , as , TV12.food, our, better, service, used to be, and ，are, than, they13.fixed, air-condioner, fixing,his ，on ，the ，he, worker, the ，eyes14.loss of sleep, suffered, headaches, he, from, and15.creatively ,some, have, may , in, using, the , students, languages, nowadays, difficulityII.1.owner Owing ownership2.poisonous3.fishermen fish fishes4.unnatural naturally5.exchanging changeable6.reasonable7.personal personality8.growth grown9. responsibility responsibly irresponsible10. feeds fed up with11. deadly death12. respectful respectfully respectable respected13. faithful faithfully14. watering15. lively living alive16.creative creative creativity creator17.messy18.irregularly19.frightening frightened20.neighbourhood21.choice chosen22.bitten bitting23.expenses25.extremely26.spreading27.unbelievable belief（s）28.impatient patientsplaints30.Russians31.greeder greeder32.discomfort uncomfortably33.apologized apologeticIII.1.solve on his own2.of his own3.So does4.In my Mom’s opinion5.how to look after/how to take care of6.to be repaired7.How did learn8.asked whether he would her9.By whom have been fed10.will you11.He thought the way of relaxing to watch TV as much as possible.12.Our food and service are better than they used to be.13.He fixed his eyes on the worker fixing the air-conditioner.14.He suffered from headaches and loss of sleep.15.Nowadays,some students may have difficulity in using the language creatively.11/ 11。

初二期中考试数学复习计划（3篇）

初二期中考试数学复习计划第一部分：知识梳理（500字）1. 复习已学知识点：回顾上学期学习的数学知识点，包括整数、小数、分数、百分数、代数式等。

通过复习，巩固基本概念和运算方法。

2. 查漏补缺：分析自己在上学期学习中容易掌握和容易混淆的知识点，通过查阅教材和参考书的相关内容，进行有针对性的复习。

3. 拓宽知识面：扩展数学知识，了解一些初中数学未教授的高中数学知识和应用领域，提前做好准备。

第二部分：理论性知识强化（____字）1. 题型分类：将已学知识点根据题型进行分类，例如选择题、填空题、解答题等。

对每种题型的解题方法进行总结，明确解题思路和步骤。

2. 练习题量的控制：根据各个题型的难易程度制定合理的练习量。

对于熟练掌握的知识点，适量练习巩固；对于掌握不牢固的知识点，增加相应的练习量。

3. 错题集整理：做题过程中及时记录做错的题目，并将其整理成错题集。

对错题进行分类，分析错误原因，总结解题方法和技巧，并进行针对性的复习和训练。

第三部分：应用性问题解决（____字）1. 实际问题应用：找一些与数学相关的实际问题进行解答。

例如：买卖问题、几何问题等。

通过解答实际问题，巩固数学知识，并将数学知识与实际生活相结合，加深理解。

2. 综合题训练：选取一些综合性较强的题目进行训练，要求综合运用数学知识进行解决。

通过解决综合性题目，能够提高解决问题的能力和思维能力，为应对考试做好准备。

3. 拓展应用领域：尝试解决一些复杂的实际问题，如工程问题、实验问题等，通过解决实际问题，丰富数学应用的领域。

第四部分：模拟考试（500字）1. 模拟试卷：找一些已经出过的模拟试卷进行模拟考试，模拟考试时要求严格按照考试时间和考试规则进行答题，模拟考试环境要尽量接近真实考试环境。

2. 错误分析：模拟考试结束后，认真检查试卷，分析错误原因，并总结出现错误的共性和原因。

并针对性地对有问题的知识点进行复习和强化训练。

3. 时间控制：模拟考试时要重点关注答题时间的控制，熟悉考试时的时间分配，以及有效利用考试时间。

2020年新人教版八年级数学下册期中复习试题(三)

八年级数学下册期中复习题三一、填空题:(每小题3分,共12题,共计36分)1.有下列计算：①632)(m m =;②121442-=+-a a a ;③326m m m =÷;④1565027=÷⨯;⑤31448332122=+-.其中正确的运算有( )A.①②③④⑤B.②③④⑤C.①④⑤D. ①③④⑤2.已知四边形ABCD 是平行四边形,下列结论中不正确的是（）A.当AB=AD 时，它是菱形B.当AC=BD 时，它是正方形C.当∠ABC=90°时，它是矩形D.当AC ⊥BD 时，它是菱形3.已知ab ＜0，则b a 2化简后为（）A.b aB.-b aC.b a -D.b a --4.实数,a b 在数轴上的位置如图2所示，则化简22(1)()a a b b ---+的结果是（）A.1B.b+1C.2aD.12a -5.平行四边形一边长12cm ，那么它的两条对角线的长度可能是( )A.8cm 和16cmB.10cm 和16cmC.8cm 和14cmD.8cm 和12cm6.如图,在平行四边形ABCD 中,AB=3cm,BC=5cm,AC,BD 相交于点O,则OA 取值范围是（）A.1cm ＜OA ＜4cmB.2cm ＜OA ＜8cmC.2cm ＜OA ＜5cmD.3cm ＜OA ＜8cm第6题图第7题图7.如图,在平行四边形ABCD 中,过点C 的直线CE ⊥AB 于E,若∠EAD=53°，则∠BCE 度数为（）A.53°B.37°C.47°D.123°8.如图,在四边形ABCD 中,R,P 分别是BC,CD 上的点,E,F 分别是AP ,RP 的中点,当点P 在CD 上从C 向D 移动而点R 不动时,下列结论成立的是( )A.线段EF 的长逐渐增大B.线段EF 的长逐渐减小C.线段EF 的长不变D.线段EF 的长与点P 的位置有关第8题图第9题图第10题图9.已知△ABC 中，∠ABC=450，AC=4,H 是高AD 和BE 的交点，则线段BH 的长度为（）A.6B.4C.23D.510.如图,矩形ABCD 中,DE ⊥AC 于E,且∠ADE:∠EDC=3:2，则∠BDE 的度数为( )A.36°B.9°C.27°D.18°11.如图,正方形ABCD 边长为8,M 在DC 上,DM=2,N 是AC 上一动点,则DN+MN 最小值为（） A.6 B.8 C.10 D.28第11题图第12题图12.如图,在四边形ABCD 中,∠DAB=∠DCB=900,CB=CD,且AD=3,AB=4,则AC 长为（）A.227 B.5 C.72D.7二、填空题(每小题3分,共6题,共计18分)13.计算2327)3()3(3302-+-++-π=_________14.已知直角三角形两边长分别为3cm 、5cm ，则第三边的长为_________15.平行四边形ABCD 的周长为20cm,对角线AC,BD 相交于点O,若△BOC 的周长比△AOB 的周长大2cm,则CD ＝ cm.16.如图,将矩形ABCD 绕点A 顺时针旋转到矩形A ′B ′C ′D ′的位置,旋转角为a (0°<a<90°)．若∠1=110°，则a = ．第16题图第17题图17.如图,在平行四边形ABCD 中,AE ⊥BD,∠EAD=600,AE=2cm ，AC+BD=14cm,则△OBC 周长是18.问题背景：在△ABC 中,AB 、BC 、AC 三边的长分别为13105、、,求这个三角形的面积.小明同学在解答这道题时,先建立一个正方形网格(每个小正方形的边长为1),在网格中画出格点△ABC(即△ABC 三个顶点都在小正方形的顶点处),如图所示,这样不需求△ABC 的高,而借用网格就能计算出它的面积.(1)请你将△ABC 的面积直接填写在横线上；(2)若△ABC 三边的长分别为)0,0,(24916222222>>≠+++n m n m n m n m n m 、、,运用构图法可求出这个三角形的面积为三、综合题(共7题,共计66分)19.(本小题8分)在△ABC中,AB,BC,AC三边的长分别为、、,求这个三角形的面积小辉同学在解答这道题时,先建立一个正方形网格（每个小正方形的边长为1），再在网格中画出格点△ABC（即△ABC 三个顶点都在小正方形的顶点处），如图1所示.这样不需求△ABC的高,而借用网格就能计算出它的面积．（1）请你将△ABC的面积直接填写在横线上（2）画△DEF,DE,EF,DF三边的长分别为、、.①判断三角形的形状,说明理由．②求这个三角形的面积．20.(本小题8分)如图所示的一块地,AD=6m,CD=4m,∠ADC=90°，AB=11m,BC=9m,求这块地的面积．21.(本小题10分)如图,已知ABCD是平行四边形,P是CD上一点,且AP和BP分别平分∠DAB和∠CBA．（1）求∠APB的度数；（2）如果AD=5cm,AP=8cm,求△APB的周长．22.(本小题10分)如图，把矩形纸片ABCD沿EF折叠，使点B落在边AD上的点B′处，点A落在点A′处，已知AD=10,CD=4,B′D=2．(1)求证：B′E=BF；(2)求AE的长．23.(本小题10分)如图，以△ABC 的三边为边在BC 的同侧分别作三个等边三角形,即△ABD,△BCE,△ACF.请回答下列问题：（1）四边形ADEF 是什么四边形？并．说明．．理由．．（2）当△ABC 满足什么条件时,四边形ADEF 是菱形？（3）当△ABC 满足什么条件时,以A 、D 、E 、F 为顶点的四边形不存在．24.(本小题10分)如图,△ABC 中，点O 是边AC 上一个动点，过O 作直线MN//BC,设MN 交∠BCA 的平分线于点E,交∠BCA 的外角平分线于点F.(1）探究：线段OE 与OF 的数量关系并加以证明；(2）当点O 在边AC 上运动时,四边形BCFE 会是菱形吗？若是,请证明;若不是,则说明理由；(3）当点O 运动到何处，且△ABC 满足什么条件时,四边形AECF 是正方形？25.(本小题10分)如图,正方形OABC的边OA,OC在坐标轴上,点B的坐标为（-3,3）．点P从点A出发,以每秒1个单位长度的速度沿x轴向点O运动;点Q从点O同时出发,以相同的速度沿x轴的正方向运动,规定点P到达点O时,点Q也停止运动.连接BP,过P点作BP的垂线,与过点Q平行于y轴的直线l相交于点D.BD与y轴交于点E,连接PE.设点P运动的时间为t（s）．（1）求∠EBP的度数和点D的坐标(点D的坐标用含t的代数式表示);（2）探索△POE周长是否随时间t的变化而变化？若变化,说明理由;若不变,试求这个定值．。

【学生卷】2022年小学英语四年级下册期中经典复习题(答案解析)(3)

一、单选题1．It's 7:30. It's time _________ school.A. to goB. to go toC. going to 2．—____________ is it?—It's 6:30.A. What timeB. How manyC. What colour 3．找出不同类的选项（）A. artB. musicC. class 4．—What _______ is it now?—It's five o'clock.A. colourB. aboutC. time 5．找出不同类的选项（）A. whereB. tigerC. computer 6．Whose coat ________?A. are theyB. is thisC. this is 7．—Are these your shoes?—Yes, ________.A. it isB. they areC. are they 8．—Can I help you?—________A. Yes, please.B. I like them.C. Yes, it is. 9．______ time is it?A. WhenB. What10．—Is it sunny in Beijing?— Yes, ________.A. it isB. is itC. it isn't 11．________ the library?A. WhereB. Where'sC. Where are 12．—Is this a farm?—________A. No, they aren't.B. Yes, it is.二、填空题13．读句子，选择合适的答句。

(________) 1. Where is the art room?(________) 2. Is it on the second floor?(________) 3. How many students?(________) 4. Is this your computer room?(________) 5. Do you have an art room?A. It's on the first floor.B. Forty-five students.C. No, it isn't.D. Yes, it is my computer coom.E. Yes, we do.14．判断下列画线部分的读音是(T)否(F)相同。

沪教版牛津英语小学四年级第一学期期中复习卷(3)附解析

沪教版牛津英语小学四年级第一学期其中复习卷（3）练习：适当形式填空：1. This boy is Martin. That is ____________ (he) ball.2. I can sing well. _____________ (I) name is Helen.3. __________ (you) are Alice. ____________ (you) car is super.4. Ben __________ (have) two friends. ___________ (it) are tall.5. Betty likes __________ (dance) and __________ (read). She can___________ (dance) well.6. Tracy is __________ (I) friend. __________ (she) student number is fifteen.7. Linda and I __________ (be) classmate. We _________ (have) got a football. __________ (we) football is black and white.8. Do you like ___________ (swim)? Yes, I do. But Danny ____________ (not like) swimming. He _________ (like) singing.9. We _________ (have) a new classmate. She __________ (live) near our school. She _________ (walk) to school.10. Kitty is ________ (peter) classmate. They’re good ___________ (friend).11. This is Mary. __________ (she) father is a teacher.12. Mr. White __________ (have) a small car. __________ (he) car is black.13. Has __________ (you) brother a nice kite?14. Is this _________ (they) classroom? Yes, it is.15. That man is ___________ (we) teacher.16. Danny ___________ (can) ride a bicycle, but he ___________ (can) fly.17. Can her brother ___________ (write) ABC? No, he __________(can).18. Do you like ___________ (write)? No, I like ___________ (swim).19. Rose ___________ (live) near her school. She ___________ (walk) to school every day.20. Mary’s grandfather is ___________(a) old driver.21. How many __________ (dolphin) are there? Two.22. Eddie likes __________ (draw). He can draw __________(good).23. How ________(do) Kitty ________? She _________ (feel) hungry.24. Here ________ some water for you.25. What are __________ (this)? They’re __________ (berry).26. My friend ___________ (not like) the skateboard. She _________ (like) the bicycle.27. Simon is thirsty. What __________ (do) he want? He __________ (want) some lemonade.28. Touch the pineapple. How _________ (do) it feel? It __________ (be) rough.解析：练习：适当形式填空：1, his2, My3, You Your4, has They5, dancing reading dance 6, my Her7, are have Our 8, swimming doesn’t like likes 9, have lives walks 10, Peter’s friends11, Her12, has His13, your14, their15, our16, can can’t17, write can’t18, writing swimming19, lives walks20, an21, dolphins22, drawing well23, does do feels24, is25, these berries26, doesn’t like likes27, does wants28, does is。

【学生卷】小学英语六年级下册期中经典复习题(含答案解析)(3)

一、单选题1．One day I _______ visit the moon.A. amB. /C. am going to2．Easy, I looked it________ on the Internet.A. upB. afterC. for3．It's faster than _________.A. walkB. walkingC. walks4．下列单词中划线部分发音是_________tomorrow now windowA. 一种B. 两种C. 三种5．The mouse is than the elephant.A. biggerB. smaller6．My sister often ______ TV on weekends, but she ______ camping last weekend.A. watches; wentB. watched; wentC. watches; goes7．He dinner at 5:00 yesterday afternoon.A. ateB. eatsC. eat8．Robin is not _______!A. sellB. saleC. for sale9．The mouse is than the elephant.A. biggerB. smaller10．He stayed______ home______ his father.A. at; withB. in; withC. at; and11．There were no computers ________ Internet in my time.A. andB. butC. or12．Tom is_______ than Ben.A. heavyB. heavyerC. heavierD. more heavy二、选词填空13．选词完成句子。

Who Whose When How What Where— It's rainy.（2）— ________ are you going?— I'm going to the zoo.（3）— ________ is that man?— He's John.（4）— ________ do you get up?— At six.（5）— ________ is that pen?— It's John's.（6）— ________ did you go to school?— On foot.14．Lucy, come here ________(at/and) have a look.15．选词填空visited bought hurt fell rode go stay was watched hospitalTim didn't ________ to school today. He________ his foot when he________a bike last weekend. He________off his bike. He went to the________at the first time. The doctor said he had to________in bed for at least a week. Yesterday his classmates went to his home and________him. They________his favourite flowers for him and took a cake to him. Tim________very happy. They________the cartoons together. After that they shared the cake together. They hoped Tim could get better soon.16．用所给单词的适当形式填空make teach read have do（1）My father________ English in a middle school.（2）Wu Yifan ________ some nice kites yesterday afternoon（3）—What does she do every evening?—She often________her homework.（4）Lily ________ her lunch at school on schooldays.（5）We should ________ books aloud in the morning.17．用所给单词的适当形式填空laugh lick take hurt can（1）Don't ________yourself, children!（2）My pet dog ________me a lot when I came home yesterday.（3）Peter ________sing nice songs when he was five.（4）He ________at the poor girl yesterday.（5）My grandfather likes ________photos of my grandmother.18．看图，从方框中选择正确的短语完成对话saw grapes hurt my arm ate some fruits rode a horse（1）—What did he eat yesterday?—He ________.（2）—What did she see on the farm yesterday?—She ________.（3）—What did she do last holiday?—She ________.19．I ________(am/was) busy last weekend. What about you?20．Jim and his family ________(is / are ) going on a trip to the countryside.三、情景交际21．—How did you change?—________22．选择正确的答语。

初中数学七年级上期中经典复习题(含答案解析)(3)

一、选择题1．下列各数中，比-4小的数是（）A． 2.5-B．5-C．0D．2 2．计算3x2﹣x2的结果是（）A．2 B．2x2 C．2x D．4x23．2019的倒数的相反数是（）A．-2019B．12019-C．12019D．20194．7张如图1的长为a，宽为b（a＞b）的小长方形纸片，按图2的方式不重叠地放在矩形ABCD内，未被覆盖的部分（两个矩形）用阴影表示．设左上角与右下角的阴影部分的面积的差为S，当BC的长度变化时，按照同样的放置方式，S始终保持不变，则a，b满足（）A．a=52b B．a=3b C．a=72b D．a=4b5．某超市以同样的价格卖出甲、乙两件商品，其中甲商品获利20%，乙商品亏损20%，若甲商品的成本价是80元，则乙商品的成本价是（）A．90元B．72元C．120元D．80元6．下列说法：①﹣a一定是负数；②|﹣a|一定是正数；③倒数等于它本身的数是±1；④绝对值等于它本身的数是1；⑤平方等于它本身的数是1．其中正确的个数是（）A．1个B．2个C．3个D．4个7．已知x＝2是关于x的一元一次方程mx+2＝0的解，则m的值为（）A．﹣1 B．0 C．1 D．28．我国古代数学的许多创新和发展都位居世界前列，如南宋数学家杨辉（约13世纪）所著的《详解九章算术》一书中，用如图的三角形解释二项和（a+b）n的展开式的各项系数，此三角形称为“杨辉三角”．根据“杨辉三角”请计算（a+b ）20的展开式中第三项的系数为（）A ．2017B ．2016C ．191D ．1909．如图，将一三角板按不同位置摆放，其中1∠与2∠互余的是( )A ．B ．C ．D ．10．如图，下列图形都是由面积为1的正方形按一定的规律组成，其中，第（1）个图形中面积为1的正方形有2个，第（2）个图形中面积为1的正方形有5个，第（3）个图形中面积为1的正方形有9个，…，按此规律．则第（6）个图形中面积为1的正方形的个数为（）A ．20B ．27C ．35D ．40 11．将方程247236x x ---= 去分母得 ( ) A ．2﹣2(2x-4)= - (x-7) B ．12﹣2(2x ﹣4)=﹣x ﹣7C ．12﹣4x ﹣8= - (x-7)D ．12﹣2(2x ﹣4)= x ﹣7 12．如下图，将直角三角形绕一条边所在直线旋转一周后形成的几何体不可能是( )A ．B ．C ．D ．13．如果||a a =-，下列成立的是（）A ．0a >B ．0a <C ．0a ≥D ．0a ≤14．下面四个代数式中，不能表示图中阴影部分面积的是（）A ．()()322x x x ++-B ．25x x +C ．()232x x ++D ．()36x x ++15．一周时间有604800秒，604800用科学记数法表示为（）A ．2604810⨯B ．56.04810⨯C ．66.04810⨯D ．60.604810⨯二、填空题16．数轴上点A 、B 的位置如下图所示，若点B 关于点A 的对称点为C ，则点C 表示的数为___17．某商品按标价八折出售仍能盈利b 元，若此商品的进价为a 元，则该商品的标价为_________元.(用含a ，b 的代数式表示).18．商店运来120台洗衣机，每台售价是440元，每售出一台可以得到售价15%的利润，其中两台有些破损，按售价打八折出售。

【学生卷】小学英语四年级上册期中经典复习题(含答案解析)(3)

一、单选题1．I'd like some chicken.A. fishB. breadC. young2．How many people are there in your family?A. 你班级里有多少个学生？B. 你家里有多少人？3．你想表达你会使用筷子，应该说：A. I can use chopsticks.B. Do you like chopsticks?4．选出不同类的单词（）A. useB. meC. like5．I'd like some ________ and soup.A. ricesB. riceC. a rice6．I'd like some soup.A. 我想要一些汤。

B. 我想要一些蔬菜。

7．What's lunch?A. toB. for8．选出不同类的一项（）A. riceB. CokeC. water9．选出不同类的一项（）A. vegetableB. studyC. bedroom10．—Where is the boy?—He is in the ______.A. bedroomB. living roomC. bathroom11．She is in the kitchen.A. 她在书房里。

B. 她在厨房里。

12． it in your hand?A. IsB. is二、填空题13．判断下面每组单词画线部分读音是否相同，相同用(T)表示，不相同用(F)表示。

①________ A.duck B．mum②________ A.cut B．cute③________ A.sofa B．phone④________ A.bed B．red⑤________ A.table B．have⑥________ A.excuse B．pupil14．找出每组单词中不同类的一项。

①________ A.pencil B．pen C．three②________ A.notebook B．purple C．yellow③________ A.eraser B．ruler C．rabbit④________ A.two B．have C．seven⑤________ A.schoolbag B．heavy C．small15．根据给出的单词，仿照例子写对话例: hand, pencil—What's in your hand?—It's a pencil.（1）hand, eraser ________（2）schoolbag, English book ________（3）desk, pencil box ________16．The picture is on the ________.17．将图片与对应的单词匹配。

五年级语文上期中综合知识复习题3含答案人教统编版

五年级语文上期中综合知识复习题一、选择题。

1.下列加点字的读音完全正确的一项是( )A.上卿．(qīng) 游隼．(zhǔn) 酬．谢(chóu) 灰烬．(jìn)B.酿．酒(niàng) 鳞．片(lín) 拗．不过(niǔ) 衰．老(shuāi)C.雕塑．(sù) 萌．芽(méng) 蓓．蕾(bèi) 勤恳．(kěn)D.应聘．(pìng) 剔．透(tī) 嗜．好(shì) 发誓．(shì)2.根据语句的内容，横线上填入最恰当的一项是( )岁月匆匆，我们已走进花一样的季节。

清点行囊，我们会发现自己多了一分成熟，________；多了一分探索，________；多了一分宽容，________；多了一分理智，________。

A.少了一分空想少了一分盲从少了一分幼稚少了一分偏激B.少了一分幼稚少了一分空想少了一分停泊少了一分盲从C.少了一分空想少了一分幼稚少了一分盲从少了一分偏激D.少了一分幼稚少了一分盲从少了一分偏激少了一分空想3.下列古诗词中与“牵牛星”“织女星”无关的是（）。

A.林杰的《乞巧》B.杜牧的《秋タ》C.白居易的《暮江吟》D.秦观的《鹊桥仙》4.下列说法有误的一项是( )A.在老牛的帮助下,牛郎认识了织女,后来他们一直过着幸福美满的日子。

B.为了阻止灾难夺去乡亲们的生命,海力布把听来的消息告诉了乡亲们,自己却变成了石头。

C.给别人讲故事时,既可以把自己设想成故事中的人物,也可以大胆想象,为故事增加合理的情节。

D.“七夕今宵看碧霄,牵牛织女渡河桥。

”这两句诗的作者是林杰,描写的是七夕节的情景。

5.关于讲故事评价标准叙述有误的一项是（）A.故事讲述完整。

B.故事生动、有趣。

C.讲述者大方得体，声音洪亮、清晰。

D.讲述者服装漂亮，吸引人。

6.下列不是欧洲民间故事的一项是（）。

A.潘多拉的盒子B.天神宙斯C.聪明的牧羊人D.曼丁之狮7.下列对民间故事的说法有误的一项是（）A.《牛郎织女》和《猎人海力布》都是民间故事。

2022-2023学年第一学期七年级数学期中复习冲刺卷(含答案解析)(3

2022-2023学年第一学期七年级数学期中复习冲刺卷(03)一、选择题（本大题共8小题，小题2分，共16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．）1．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）如果向西走，记作，那么表示（）A．向东走B．向南走C．向西走D．向北走2．(本题2分)（2022·江苏南京·七年级期末）下列计算正确的是（）A．B．C．D．3．(本题2分)（2022·江苏·南京秦淮外国语学校七年级阶段练习）美丽的沭阳是一个充满生机和活力的地域.它古老而又年轻，区域内的耕地面积约为2100000亩，则2100000科学记数法可表示为（）A．B．C．D．4．(本题2分)（2022·江苏·鼓楼实验中学七年级阶段练习）下列各数∶- 3，，0，π，0.25，其中有理数的个数为（）A．3 B．4 C．5 D．65．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）在﹣0.1548中用数字3替换其中的一个非零数字后，使所得的数最大，则被替换的数字是（）A．1 B．5 C．4 D．86．(本题2分)（2022·全国·七年级课时练习）对于两个不相等的有理数a，b，我们规定符号min{a，b}表示a、b两数中较小的数，例如min{2，-4}＝-4，则方程min{x，-x}＝3x＋4的解为（）A．x＝－1 B．x＝－2 C．x＝－1或x＝－2 D．x＝1或x＝27．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）现把2022个连续整数1，2，3，…，2022的每个数的前面任意填上“+”号或者“”号，然后将它们相加，则所得的结果绝对值的最小值为（）A．3 B．2 C．1 D．08．(本题2分)（2018·江苏南京·七年级期中）如图，数轴上点A、B表示的数是a、b，点A在表示-3，-2的两点（包括这两点）之间移动，点B在表示-1,0的两点（包括这两点）之间移动，则以下对四个代数式的值判断正确的是（）A．的值一定大于3B．的值一定小于-7C．的值可能比2018大D．的值可能是一个正数二、填空题（本大题共10小题，每小题2分，共20分）9．(本题2分)（2021·江苏南京·七年级期中）若a＝﹣2，则a的倒数是___，相反数是____．10．(本题2分)（2022·江苏·鼓楼实验中学七年级阶段练习）小明写作业时不小心将墨水滴在数轴上，根据图中的数值，判定墨迹盖住部分的整数共有__________个．11．(本题2分)（2022·江苏·南京市第三十九中学七年级阶段练习）比较大小：_______（填“＞”、“＝”或“＜”）．12．(本题2分)（2021·江苏省南京市浦口区第三中学七年级阶段练习）若两单项式与是同类项，则m的值是________．13．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）小亮有5张卡片，上面分别写有、、0、、，他想从这5张卡片中取出2张，使得这2张卡片上的数字相除的商最小，商的最小值是___________．14．(本题2分)（2021·江苏南京·七年级期末）已知2a－b＋2＝0，则1－4a＋2b的值为______．15．(本题2分)（2022·江苏·七年级专题练习）小明在计算1－3＋5－7＋9－11＋13－15＋17时，不小心把一个运算符号写错了（“＋”错写成“－”或“－”错写成“＋”），结果算成了－17，则原式从左往右数，第______个运算符号写错了．16．(本题2分)（2020·江苏南京·七年级期中）如图，每个格子中都是整数，若任意三个相邻格子中所填整数之和都相等，则从左边第一个格子开始向右数，第2020个格子中的数为____．17．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）以1厘米为1个单位长度用直尺画数轴时，数轴上互为相反数的点A和点B刚好对着直尺上的刻度1和刻度9．（1）在数轴上点A表示的数是___________；（2）在数轴上有一点D，其到A的距离为3，到B的距离为5，则点D关于原点对称的点．．．．．．．．表示的数是___________；（3）将线段分成2023等份，从B点开始往左数，第．1000．．．．在数轴上所表示的数为___________．．．．．个等分点18．(本题2分)（2019·江苏·南京市第十三中学七年级期中）如图是一个三角形数阵，仔细观察排列规律：第1行1第2行－第3行－－第4行－－.....按照这个规律继续排列下去，第21行第2个数是_______．三、解答题（本大题共8小题，共64分．解答时应写出文字说明、证明程或演算步骤）19．(本题8分)（2021·江苏南京·七年级期中）计算（1）－7＋(＋20)－(－5)；（2）－2.5÷(－)×(－)；（3）(－6)×＋×(－6)＋(－6)×；（4）－32－×[12－(－2×3)2]．(本题6分)（2022·江苏南京·七年级期末）先化简，再求值：，其中，．21．(本题6分)（2022·江苏·南京民办求真中学七年级阶段练习）解方程．(1)．(2)．22．(本题8分)（2022·江苏·南京东山外国语学校七年级阶段练习）结合数轴与绝对值的知识回答下列问题：(1)数轴上表示4和1的两点之间的距离是________；数轴上表示和2两点之间的距离是________；一般地，数轴上表示数m和数n的两点之间的距离可以表示为．那么，数轴上表示数x与5两点之间的距离可以表示为________，表示数y与两点之间的距离可以表示为________．(2)如果表示数a和的两点之间的距离是3，那么________；若数轴上表示数a的点位于与2之间，求的值．23．(本题8分)（2022·江苏·南京市第二十九中学七年级阶段练习）有一批试剂，每瓶标准剂量为220毫升，现抽取8瓶样品进行检测，结果如下（单位：毫升）：230，226，218，223，214，225，205，212.(1)根据标准剂量，用正、负数记数填表；(2)这8瓶样品试剂的总剂量是多少？(3)若增加或者减少每瓶试剂剂量的人工费10元/毫升，问8瓶样品试剂再加工制作成标准剂量需要多少人工费？24．(本题8分)（2019·江苏·南京市第十三中学七年级期中）如图是小江家的住房户型结构图．根据结构图提供的信息，解答下列问题：（1）用含a、b的代数式表示小江家的住房总面积S；（2）小江家准备给房间重新铺设地砖．若卧室所用的地砖价格为每平方米50元；卫生间、厨房和客厅所用的地砖价格为每平方米40元．请用含a、b的代数式表示铺设地砖的总费用W；（3）在（2）的条件下，当a＝6，b＝4时，求W的值．25．(本题10分)（2020·江苏·南京市溧水区和凤初级中学七年级阶段练习）一项工程，如果甲工程队单独做需20天完成，乙工程队单独做需12天完成．现在先由甲单独做4天，剩下的部分由甲、乙合作完成．（1）（列方程解答）剩下的部分合作还需要几天完成？（2）若该工程的总费用为240万元，根据实际完成情况，甲乙两工程队各得120万元，你同意吗？若同意，请说明理由；若不同意，请写出分配方案．26．(本题10分)（2022·江苏·七年级期中）如图，某校的“图书码”共有7位数字，它是由6位数字代码和校验码构成，其结构分别代表“种类代码、出版社代码、书序代码和校验码”．其中校验码是用来校验图书码中前6位数字代码的正确性．它的编制是按照特定的算法得来的．以上图为例，其算法为：步骤1：计算前6位数字中偶数位数字的和，即；步骤2：计算前6位数字中奇数位数字的和，即；步骤3：计算与的和，即；步骤4：取大于或等于且为10的整数倍的最小数，即；步骤5：计算与的差就是校验码，即．请解答下列问题：（1）《数学故事》的图书码为978753，则“步骤3”中的的值为______，校验码的值为______．（2）如图①，某图书码中的一位数字被墨水污染了，设这位数字为，你能用只含有的代数式表示上述步骤中的吗？从而求出的值吗？写出你的思考过程．（3）如图②，某图书码中被墨水污染的两个数字的差是4，这两个数字从左到右分别是多少？请直接写出结果．答案与解析一、选择题（本大题共8小题，小题2分，共16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．）1．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）如果向西走，记作，那么表示（）A．向东走B．向南走C．向西走D．向北走【答案】A【分析】根据“正数和负数表示相反意义的量”即可进行解答．【详解】解：∵向西走，记作，∴表示向东走，故选：A．【点睛】本题主要考查了正数和负数的意义，解题的关键是掌握“正数和负数表示相反意义的量”是解题的关键．2．(本题2分)（2022·江苏南京·七年级期末）下列计算正确的是（）A．B．C．D．【答案】B【分析】利用合并同类项，逐项判断即可求解．【详解】解：A、，故本选项错误，不符合题意；B、，故本选项正确，符合题意；C、和不是同类项，不能合并，故本选项错误，不符合题意；D、，故本选项错误，不符合题意；故选：B【点睛】本题主要考查了合并同类项，熟练掌握合并同类项法则：把同类项的系数相加，所得的结果作为系数，字母连同指数不变是解题的关键．3．(本题2分)（2022·江苏·南京秦淮外国语学校七年级阶段练习）美丽的沭阳是一个充满生机和活力的地域.它古老而又年轻，区域内的耕地面积约为2100000亩，则2100000科学记数法可表示为（）A．B．C．D．【答案】C【分析】科学记数法的表示形式为的形式，其中1≤|a|＜10，n为整数．确定n的值时，要看把原数变成a时，小数点移动了多少位，n的绝对值与小数点移动的位数相同．【详解】解：2100000=．故选：C．【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的形式，其中1≤|a|＜10，n为整数，表示时关键要确定a的值以及n的值．4．(本题2分)（2022·江苏·鼓楼实验中学七年级阶段练习）下列各数∶- 3，，0，π，0.25，其中有理数的个数为（）A．3 B．4 C．5 D．6【答案】B【分析】根据有理数的定义，即可求解．【详解】解：有理数有- 3，，0，0.25，共4个，故选：B【点睛】本题主要考查了有理数，熟练掌握整数和分数统称为有理数是解题的关键．5．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）在﹣0.1548中用数字3替换其中的一个非零数字后，使所得的数最大，则被替换的数字是（）A．1 B．5 C．4 D．8【答案】B【分析】根据两个负数比较大小，绝对值大的其值反而小比较被替换的数的绝对值的大小，得到答案．【详解】解：被替换的数是-0.3548，-0.1348，-0.1538，-0.1543，|-0.1348|＜|-0.1538|＜|-0.1543|＜|-0.3548|，∴最大的数是-0.1348，∴使所得的数最大，则被替换的数字是5，故选：B．【点睛】本题考查的是有理数的大小比较，掌握有理数的大小比较法则：正数都大于0；负数都小于0；正数大于一切负数，两个负数，绝对值大的其值反而小是解题的关键．6．(本题2分)（2022·全国·七年级课时练习）对于两个不相等的有理数a，b，我们规定符号min{a，b}表示a、b两数中较小的数，例如min{2，-4}＝-4，则方程min{x，-x}＝3x＋4的解为（）A．x＝－1 B．x＝－2 C．x＝－1或x＝－2 D．x＝1或x＝2【答案】B【分析】根据题意可得：min{x，-x}或，所以或，据此求出的值即可．【详解】规定符号min{a，b}表示a、b两数中较小的数，当min{x，-x}表示为时，则，解得，当min{x，-x}表示为时，则，解得，时，最小值应为，与min{x，-x}相矛盾，故舍去，方程min{x，-x}＝3x＋4的解为，故选：B．【点睛】本题主要考查一元一次方程的解法，能根据题意正确列出一元一次方程是解题的关键．7．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）现把2022个连续整数1，2，3，…，2022的每个数的前面任意填上“+”号或者“”号，然后将它们相加，则所得的结果绝对值的最小值为（）A．3 B．2 C．1 D．0【答案】C【分析】根据有理数和绝对值的意义，得出绝对值是最小值时的符号规律，进而求出答案．【详解】解：∵除4等于505余2∴===1，故选C．【点睛】本题主要考查绝对值及有理数的运算，掌握有理数的运算法则是关键．8．(本题2分)（2018·江苏南京·七年级期中）如图，数轴上点A、B表示的数是a、b，点A在表示-3，-2的两点（包括这两点）之间移动，点B在表示-1,0的两点（包括这两点）之间移动，则以下对四个代数式的值判断正确的是（）A．的值一定大于3B．的值一定小于-7C．的值可能比2018大D．的值可能是一个正数【答案】A【分析】根据A、B两点在数轴上的位置可知，，再对选项逐一判断即可【详解】A.，，所以，所以的值一定大于3，此选项正确B.，，所以，，故此选项错误C.，，所以，，，故此选项错误D.，，所以，，故此选项错误故答案选A【点睛】此题考查数轴上点的位置特征二、填空题（本大题共10小题，每小题2分，共20分）9．(本题2分)（2021·江苏南京·七年级期中）若a＝﹣2，则a的倒数是___，相反数是____．【答案】【分析】相反数的定义：只有符号不同的两个数互为相反数，0的相反数是0；倒数的定义：若两个数的乘积是1，我们就称这两个数互为倒数．【详解】解：∵a＝﹣2，∴a的倒数是，∴a的相反数是2．故答案为：，2．【点睛】本题考查了相反数，倒数的概念及性质，解题的关键是掌握相反数，倒数的概念及性质．10．(本题2分)（2022·江苏·鼓楼实验中学七年级阶段练习）小明写作业时不小心将墨水滴在数轴上，根据图中的数值，判定墨迹盖住部分的整数共有__________个．【答案】6【分析】根据数轴的单位长度，判断墨迹盖住部分的整数即可.【详解】解：由图可知，左边盖住的整数数值是-5，-4，-3；右边盖住的整数数值是2，3，4，所以墨迹盖住部分的整数共有6个.故答案为6.【点睛】本题主要考查了数轴. 关键是根据未盖住的整数值进行判断.11．(本题2分)（2022·江苏·南京市第三十九中学七年级阶段练习）比较大小：_______（填“＞”、“＝”或“＜”）．【答案】＞【分析】根据两个负数比较大小，绝对值大的反而小，先比较它们的绝对值，再比较它们的大小．【详解】解：∵，∴；故答案为：＞【点睛】本题考查有理数的大小比较，掌握有理数的大小比较方法是解决问题的关键．12．(本题2分)（2021·江苏省南京市浦口区第三中学七年级阶段练习）若两单项式与是同类项，则m的值是________．【答案】2【分析】根据同类项得到m+1=3，即可得到答案．【详解】解：由题意得m+1=3，得m=2，故答案为：2．【点睛】此题考查了同类项的定义：含有相同的字母，且相同字母的指数分别相等，熟记定义是解题的关键．13．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）小亮有5张卡片，上面分别写有、、0、、，他想从这5张卡片中取出2张，使得这2张卡片上的数字相除的商最小，商的最小值是___________．【答案】【分析】根据两数相除，同号得正异号得负可知要使商最小则需要选择两个异号的数，使商为负数，再根据负数的绝对值越大反而小即可进行解答．【详解】解：应该选择和，，故答案为：．【点睛】本题主要考查了有理数的除法法则和负数比较大小，解题的关键是熟练掌握有理数的除法法则和负数比较大小的法则．14．(本题2分)（2021·江苏南京·七年级期末）已知2a－b＋2＝0，则1－4a＋2b的值为______．【答案】5【分析】由得，整体代入代数式求值．【详解】解：∵，∴，∴原式．故答案是：5．【点睛】本题考查代数式求值，解题的关键是掌握整体代入的思想．15．(本题2分)（2022·江苏·七年级专题练习）小明在计算1－3＋5－7＋9－11＋13－15＋17时，不小心把一个运算符号写错了（“＋”错写成“－”或“－”错写成“＋”），结果算成了－17，则原式从左往右数，第______个运算符号写错了．【答案】6【分析】先确定哪一个数的符号出了错，再确定这个符号是第几个．【详解】∵1－3＋5－7＋9－11＋13－15＋17=9，∴-17小于9，∴一定是把+错写成减号了，∴这个数为[9-（-17）]÷2=13，∴是第六个符号写错了，故答案为：6．【点睛】本题考查了有理数的混合运算，大小的比较，熟练进行计算是解题的关键．16．(本题2分)（2020·江苏南京·七年级期中）如图，每个格子中都是整数，若任意三个相邻格子中所填整数之和都相等，则从左边第一个格子开始向右数，第2020个格子中的数为____．∵任意三个相邻格子中所填整数之和都相等，∴，解得，由，∴，由，解得，由，解得，由，解得，所以数据从左到右依次为-3、1、4、-3、1、4、-3、1、4，所以每3个数“-3、1、4”为一个循环组依次循环，∵2020÷3=673…1，∴第2020个格子中的整数与第1个格子中的数相同，为-3．故答案为：-3．【点睛】本题考查数字的变化规律，仔细观察排列规律求出a、b、c、d、e的值，从而得到其规律是解题的关键．17．(本题2分)（2022·江苏·南京市第二十九中学七年级阶段练习）以1厘米为1个单位长度用直尺画数轴时，数轴上互为相反数的点A和点B刚好对着直尺上的刻度1和刻度9．（1）在数轴上点A表示的数是___________；（2）在数轴上有一点D，其到A的距离为3，到B的距离为5，则点D关于原点对称的点．．．．．．．．表示的数是___________；（3）将线段分成2023等份，从B点开始往左数，第．1000．．．．个等分点．．．．在数轴上所表示的数为___________．【答案】 1【分析】（1）利用间的距离和A、B互为相反数，即可求解；（2）利用两点间的距离，即可求解；（3）根据两点间的距离及等分，即可求解．【详解】解：（1）点A和点B刚好对着直尺上的刻度1和刻度9，，A、B在数轴上互为相反数，且A在左侧，B在右侧，点A在数轴上表示的数为，点B在数轴上表示的数为．故答案为：．（2）点A在数轴上表示的数为，点D到点A的距离为3，点D在数轴上表示的数为或，点D在数轴上表示的数为或，点B在数轴上表示的数为4，点D到B的距离为5，点D在数轴上表示的数为或，点D在数轴上表示的数为或，综上，点D在数轴上表示的数为，点D关于原点对称的点．．．．．．．．表示的数是1．故答案为：1．（3），点B在数轴上表示的数为4，将线段分成2023等份，从B点开始往左数，第1000个等分点在数轴上所表示的数为．故答案为：．【点睛】本题考查了数轴上两点间的距离，解题的关键是熟练掌握两点间的距离是表示两个点的数的差的绝对值或用右边的数减去左边的数．18．(本题2分)（2019·江苏·南京市第十三中学七年级期中）如图是一个三角形数阵，仔细观察排列规律：第1行1第2行－第3行－－第4行－－.....按照这个规律继续排列下去，第21行第2个数是_______．【答案】－【分析】先观察找出规律，把1看成，那么数阵中不看符号，第1个数、第2个数、第3个数、…分母分别是1、2、3、…，分子都是分母的2倍减1，而分母是奇数时取正，分母为偶数时取负，然后判断第21行第2个数是所有数中第几个数，按照规律写出即可.【详解】由数阵可知，第n行有n个数，∴前20行总共有：1+2+3+4+…+20=个数，∴第21行第2个数是所有数中第212个数，又∵所有数中第m个数：分母为m，分子为2m－1，符号为(－1)m+1，即第m个数是，∴第212个数是，即第21行第2个数是.【点睛】本题考查数字类规律题，正确找出所给数的规律是解题关键.三、解答题（本大题共8小题，共64分．解答时应写出文字说明、证明程或演算步骤）19．(本题8分)（2021·江苏南京·七年级期中）计算（1）－7＋(＋20)－(－5)；（2）－2.5÷(－)×(－)；（3）(－6)×＋×(－6)＋(－6)×；（4）－32－×[12－(－2×3)2]．【答案】（1）18；（2）－1；（3）－12；（4）－8【分析】（1）原式利用减法法则变形，计算即可得到结果；（2）从左到右计算除法乘法即可得到结果；（3）原式先计算乘法运算再计算加减法运算即可得到结果；（4）原式先计算乘方运算，再计算括号内的运算，再算乘法运算最后计算加减即可得到结果．【详解】（1）解：原式=－7＋20＋5，=18；（2）解：原式= ，= －1 ；（3）解：原式=(－6)×(＋＋)，=(－6)×2 ，=－12；（4）解：原式=－9－×（12－36 ），=－9－×（－24 ），=－9＋1，=－8．【点睛】此题考查了有理数的混合运算，熟练掌握运算法则是解本题的关键．20．(本题6分)（2022·江苏南京·七年级期末）先化简，再求值：，其中，．【答案】；【分析】先去括号，再合并同类项，再将字母的值代入求解即可．【详解】解：当，，原式【点睛】本题考查了整式加减中的化简求值，正确的去括号是解题的关键．21．(本题6分)（2022·江苏·南京民办求真中学七年级阶段练习）解方程．(1)．(2)．【答案】(1)x＝6(2)【分析】（1）方程去括号，移项，合并同类项，系数化为1即可；（2）方程去分母，去括号，移项，合并同类项，系数化为1即可．（1）解：3（2x−3）＝18−（3−2x），去括号，得6x−9＝18−3＋2x，移项，得6x−2x＝18＋9−3，合并同类项，得4x＝24，系数化为1，得x＝6；（2）解：，去分母，得，去括号，得，移项，得，合并同类项，得，系数化为1，得．【点睛】本题主要考查解一元一次方程，去分母、去括号、移项、合并同类项、系数化为1，这仅是解一元一次方程的一般步骤，针对方程的特点，灵活应用，各种步骤都是为使方程逐渐向x＝a形式转化．22．(本题8分)（2022·江苏·南京东山外国语学校七年级阶段练习）结合数轴与绝对值的知识回答下列问题：(1)数轴上表示4和1的两点之间的距离是________；数轴上表示和2两点之间的距离是________；一般地，数轴上表示数m和数n的两点之间的距离可以表示为．那么，数轴上表示数x与5两点之间的距离可以表示为________，表示数y与两点之间的距离可以表示为________．(2)如果表示数a和的两点之间的距离是3，那么________；若数轴上表示数a的点位于与2之间，求的值．【答案】(1)3；5；|x-5|；|y-（-1）|(2)a=-5或1；6．【分析】（1）根据数轴上表示数m和数n的两点之间的距离可以表示为|m-n|，直接计算即可；（2）结合数轴观察即可．（1）解：数轴上表示4和1的两点之间的距离为：|4-1|=3，表示-3和2两点之间的距离为：|-3-2|=5，数轴上表示数x与5两点之间的距离可以表示为|x-5|，表示数y与-1两点之间的距离可以表示为|y-（-1）|；故答案为：3；5；|x-5|；|y-（-1）|；（2）解：如果表示数a和-2的两点之间的距离是3，那么a=-5或1；∵a的点位于-4与2之间，∴-4≤a≤2，∵|a+4|+|a-2|表示a到-4与2的距离的和，∴|a+4|+|a-2|=6．【点睛】本题考查了数轴上两点间的距离公式，解题的关键是熟练掌握数轴上两点间的距离是两个数差的绝对值．23．(本题8分)（2022·江苏·南京市第二十九中学七年级阶段练习）有一批试剂，每瓶标准剂量为220毫升，现抽取8瓶样品进行检测，结果如下（单位：毫升）：230，226，218，223，214，225，205，212.(1)根据标准剂量，用正、负数记数填表；(2)这8瓶样品试剂的总剂量是多少？(3)若增加或者减少每瓶试剂剂量的人工费10元/毫升，问8瓶样品试剂再加工制作成标准剂量需要多少人工费？【答案】(1)，，，，，，，(2)这8瓶样品试剂的总剂量是1753毫升(3)8瓶样品试剂再加工制作成标准剂量需要550元人工费【分析】（1）用每瓶试剂的实际剂量减去每瓶标准剂量220毫升进行求解即可；（2）对用每瓶试剂的实际剂量进行求和计算；（3）用增加或者减少每瓶试剂剂量的人工费10元/毫升乘以这8瓶试剂剂量与标准差距的和．（1）解：，，，，，，，．故答案为：，，，，，，，．（2）解：（毫升）．答：这8瓶样品试剂的总剂量是1753毫升．（3）解：（元）．答：8瓶样品试剂再加工制作成标准剂量需要550元人工费．【点睛】此题考查了正数和负数，解题的关键是理解“正”和“负”的相对性，并能正确列式、计算．24．(本题8分)（2019·江苏·南京市第十三中学七年级期中）如图是小江家的住房户型结构图．根据结构图提供的信息，解答下列问题：（1）用含a、b的代数式表示小江家的住房总面积S；（2）小江家准备给房间重新铺设地砖．若卧室所用的地砖价格为每平方米50元；卫生间、厨房和客厅所用的地砖价格为每平方米40元．请用含a、b的代数式表示铺设地砖的总费用W；（3）在（2）的条件下，当a＝6，b＝4时，求W的值．【答案】(1) S＝8a－3b；(2)W＝320a－150b＋240;(3)1560【分析】（1）根据图形及长方形面积公式求面积；（2）分别表示出卧室及卫生间、厨房和客厅的面积，再乘以对应价格，列式化简即可；（3）把a＝6，b＝4代入（2）中所得式子进行计算即可得出结果.【详解】解：（1）S＝8a－3b；（2）由题可得，卧室面积为3(8－b)平方米，卫生间、厨房和客厅的总面积为8(a－3)平方米，∴W＝3(8－b)×50＋8(a－3)×40＝1200－150b＋320a－960＝320a－150b＋240，（3）当a＝6，b＝4时，W＝320×6－150×4＋240＝1920－600＋240＝1560（元）.【点睛】本题考查列代数式及代数式求值，弄清题意是解题的关键.25．(本题10分)（2020·江苏·南京市溧水区和凤初级中学七年级阶段练习）一项工程，如果甲工程队单独做需20天完成，乙工程队单独做需12天完成．现在先由甲单独做4天，剩下的部分由甲、乙合作完成．（1）（列方程解答）剩下的部分合作还需要几天完成？（2）若该工程的总费用为240万元，根据实际完成情况，甲乙两工程队各得120万元，你同意吗？若同意，请说明理由；若不同意，请写出分配方案．【答案】（1）剩下的部分合作还需要6天完成；（2）同意，理由见解析【分析】（1）设剩下的部分合作还需要x天完成，根据题意列出方程，求出方程的解即可得到结果；（2）同意，求出甲完成的工作量，比较即可．【详解】解：（1）设剩下的部分合作还需要x天完成，根据题意得：×4+（）x＝1，解得：x＝6，则剩下的部分合作还需要6天完成；（2）同意，甲完成的工作量为×（4+6）＝，乙完成的工作量为×6＝，则甲乙完成的工作量都是，所以报酬应相同．【点睛】此题考查了一元一次方程的应用，弄清题意是解本题的关键．26．(本题10分)（2022·江苏·七年级期中）如图，某校的“图书码”共有7位数字，它是由6位数字代码和校验码构成，其结构分别代表“种类代码、出版社代码、书序代码和校验码”．其中校验码是用来校验图书码中前6位数字代码的正确性．它的编制是按照特定的算法得来的．以上图为例，其算法为：步骤1：计算前6位数字中偶数位数字的和，即；步骤2：计算前6位数字中奇数位数字的和，即；步骤3：计算与的和，即；步骤4：取大于或等于且为10的整数倍的最小数，即；步骤5：计算与的差就是校验码，即．请解答下列问题：（1）《数学故事》的图书码为978753，则“步骤3”中的的值为______，校验码的值为______．（2）如图①，某图书码中的一位数字被墨水污染了，设这位数字为，你能用只含有的代数式表示上述步骤中的吗？从而求出的值吗？写出你的思考过程．。

《微积分Ⅱ》期中复习题(三)答案

《微积分Ⅱ》期中复习题（三）答案一、选择题（每小题4分共16分）1、设()f x为连续函数，且2())F x t dt =−，则(1)F ′=（） A 、0 B 、12C 、1−D 、1解B：()()21()cos 11,(1)2F x x F ′′′=−=−=2、下列反常积分中发散的是（）A 、11p dx x +∞∫(1)p < B、10∫ C 、03xe dx −∞∫ D 、101p dx x ∫(01)p << 解A ：1p <,111111p pdx x p x +∞+∞−+==∞−+∫; 0∫； 00331133xxe dx e −∞−∞==∫; 1110011111p pdx x p p x −+==−+−+∫(01)p << 3、对二元函数(,)z f x y =在点00(,)M x y 处，以下命题正确的是（）A 、不连续，必极限不存在B 、可偏导，必连续C 、可偏导，必可微D 、不可偏导，必不可微解D ，函数偏导数存在且连续⇒函数可微⇒⇒函数连续偏导数存在4、设y xz x y =+，则21x y zy==∂=∂（）A 、2ln 2B 、2ln 21+C 、2ln 22+D 、2ln 23+ 解C ：()12211ln 2ln 22y x x x y y z x x xy y−====∂=+=+∂二、填空：（每小题4分共20分）1、二元函数z =的定义域是 .解：定义域000x x y y ⎧⎧≥≥⎪⎪⇒⎨⎨≥≥⎪⎪⎩⎩，f D =(){},0x y x y ≥≥2、2limln(12)x t x e dtx −→=+∫.解：原式=202lim 112x x e xx−→=+03、422(sin )sin x x xdx ππ−+=∫.解：原式=4222(sin sin )x x x dx ππ−+∫，4sin x x 是奇函数，2sin x 是偶函数，原式=()2222012sin 1cos 2sin 22xdx x dx x x πππ⎛⎞=−=−=⎜⎟⎝⎠∫∫2π4、设()z f ax by =+，其中()f u 可微，则z zx y∂∂+=∂∂ . 解：z z x y∂∂+=∂∂()()af ax by bf ax by ′′+++ 5、已知某产品的边际收益函数为()1004R Q Q ′=−，则总收益函数()R Q = .解：()()20()10041002QQR Q t dt t t =−=−=∫21002Q Q −三、计算下列各题：（每小题7分共49分）1、2332112432xx x e dx x −−⎛⎞−+⎜⎟+⎝⎠∫；解：原式=()2212242333111ln 215ln 2x xexee −−−−−+++=+−+2、61∫222,,6,4;1,133t tt x dx dt x t x t +=⇒======原式=()42442311121222122633993t t dt t dt t t t +⎛⎞⋅⋅=+=+=⎜⎟⎝⎠∫∫ 3、设函数()f x连续，且1201()()1f x f x dx x =−+，求()f x . 解：设1()A f x dx =∫，11201arctan 441A dx A A x A A x πππ=−⇒=−⇒=++∫∫ 4、设arctanx yz x y+=−，求dz ；解：()()()()()222222121x y x y z y yxx y x y x y x y x y x y −−+∂==−=−∂+−−++⎛⎞++⎜⎟−⎝⎠()()()()()222222121x y x y z x xyx yx y x y x y x y x y −++∂===∂+−−++⎛⎞++⎜⎟−⎝⎠2222y xdz dx dy x y x y=−+++ 5、设42334tan z x x y y =−−，求222,z zy xx ∂∂∂∂∂.解：233232128,368z z x xy x y x x∂∂=−=−∂∂；2224z xy y x ∂=−∂∂ 6、设23(,)z f x y xy =−，其中(,)f u v 可微，求,z zx y∂∂∂∂. 解：122z xf yf x ∂′′=+∂，2123zy f xf y∂′′=−+∂ 7、设方程ln z x y=确定函数(,)z f x y =，求,z z x y ∂∂∂∂. 解：设(),,lnln ln zF x y z x z y x y=−=−− 11x z F z z x F z∂−=−=−=∂ 1y z F z zy y F yz −∂=−=−=∂四、应用题：（ 10分）设D 是由曲线221,,1xy x y ex −=+==在第一象限内所围成的图形，求（1）图形的面积S ；（2）由此图形绕x 轴旋转所得的立体体积x V . 解：（1）()()112232220011415111323262x x S x e dx x x e e e −−−−⎛⎞=+−=++=+−=+⎜⎟⎝⎠∫（2）()()11222224400112x x x V x e dx x x e dx ππ−−⎡⎤⎡⎤=+−=++−⎣⎦⎢⎥⎣⎦∫∫. 135440211971354604x x x x e e ππ−−⎛⎞⎛⎞=+++=+⎜⎟⎜⎟⎝⎠⎝⎠五、证明题（二选一，5分）1、设方程22()y z xf y z +=−确定函数(,)z f x y =，其中()f u 可微，证明：z zxz y x y∂∂+=∂∂x证明：设()22,,()F x y z xf y z y z =−−−222222()()2()12()1x z F z f y z f y z x F zxf u xzf y z ∂−−=−=−=′′∂−−−+ 22222()12()12()12()1y z F zyxf u xyf y z y F zxf u xzf y z ′′∂−−−=−=−=′′∂−−−+222222222222222222()2()1()2()2()12()12()12()2()1z z f y z yxf y z xf y z z xyzf y z x z x z x y xzf y z xzf y z xzf y z y xyzf y z y xzf y z ′′∂∂−−−−−+−+=+=′′′∂∂−+−+−+′+−==′−+2、设函数(),()f x g x 在区间[],a b 上连续，且()0g x >，证明至少存在一点[],a b ξ∈，使()()()()b baaf xg x dx f g x dx ξ=∫∫.证明：()f x ,()g x 在区间[],a b 上连续，且()0g x >,由最值定理，()f x 在区间[],a b 上存在最大最小值，()m f x M ≤≤，所以()()()()mg x f x g x Mg x ≤≤()()()()b b baaam g x dx f x g x dx M g x dx ≤≤∫∫∫()()()babaf xg x dxm M g x dx≤≤∫∫由介值定理，少存在一点[],a b ξ∈使()()()()babaf xg x dxf g x dxξ=∫∫, 即()()()()bbaaf xg x dx f g x dx ξ=∫∫。

九年级期中复习——阅读理解(3)

九年级期中复习——阅读理解（三）AWhen you want to go shopping, you should decide first how much money you can pay for new clothes. Think about the kind of clothes you really need. Then look for those clothes on sale, this is to say, you can buy some new clothes at a lower price.There are labels(标签) inside all new clothes. The labels tell you how to take care of your clothes. The label for a shirt may tell you to wash it in warm water. A sweater label may tell you to wash it in cold water. The label on a coat may sa y “Dry Clean Only”. Washing may ruin(毁坏)this coat. If you do as the directions say on the label, you can keep your clothes looking their best.Many clothes today must be dry-cleaned. Dry-cleaning is expensive. When you buy new clothes, you should look at them carefully to make sure if they need to be dry-cleaned. Y ou will save money if you buy clothes that can be washed easily.If you buy some well-made clothes, you can save money because they can last longer. They look good even after they have been washed many times. Sometimes some clothes cost more money, but it doesn’t mean that they are always better made, or they always fit better. In other words, some less expensive clothes look and fit better than more expensive clothes.1. If you want to save money, you can buy clothes that .A. don’t fit youB. don’t last longC. need to be dry-cleanedD. can wash easily2.The labels inside the clothes tell you .A. how to keep them looking their bestB.how to save moneyC. whether they fit you or notD. where to wash the clothes3. From this passage we can learn that “directions” means .A. 方向B.说明C.生产商D.专家4. When you buy new clothes, you should think about_______ first.A. the kind of the clothesB.how to save moneyC. the money yon can pay for the clothesD.the label inside5. We learn from the passage that cheaper clothes .A. are always worse madeB. must be dry-cleanedC. can sometimes fit you betterD.cannot be washedBFood is very important. Everyone needs food to eat well if he or she wants to have a strong body. Our minds also need a kind of food. This kind of food is knowledge.When we are very young, we start getting knowledge. Y oung children like watching and listening. Colour pictures especially interest them. When children are older, they enjoy reading.When something interests them, they love asking questions.Our minds, like our bodies, always need the best food. Studying on our own brings the most knowledge.If someone is always telling us answers, we never learn well. When we study correctly and get knowledge on our own, we learn more and understand better.6. why does everyone need to eat well? ______ .A. It can help people to be healthyB. It can help people to study wellC. It can help people to enjoy readingD. It can help people to colour pictures7.What kind of food do our minds need? ______.A. PictureB. BooksC. RiceD. Knowledge8. When do we start getting knowledge? ______.A. when we are oldB. when we are youngC. when we are studentsD. when we teachers9.Why do children like watching and listening? ______.A. They want to eatB. They are too youngC. They have many colour picturesD. They need knowledge10.How can we learn more and understand better? ______.A. we eat the best foodB. we study correctlyC. we get knowledge by ourselvesD. both B and CCIt’s a 5-year-old Karmen’s dream to be a ballet dancer.But Karmen,who lives in Denver,was born with the AIDS virs and has spent much of her short life going in and out of the hospital. Karmen has done better than anyone had hoped.Doctors thought she would never walk or talk,but she gets around with a walker and speaks well.Karmen may not grow up to be a ballet dancer.But even if it’s difficult for her to walk,she was changed when she wore a short ballet skirt.Her mother bought her the skirt.She was really like a ballet dancer.Sometimes, Karmen puts her head on her folded hands because she is tired,and sometimes she needs to talk with God.One of her prayers goes, “Dear God,please make my legs and body strong.Please let me grow up.”Children with cancer,AIDS and other serious illnesses want to know that they are not alone.They want truthful answers to difficult questions,and they want to tell stories ---for the family,friends and for themselves.11．Is it possible for Karmen’s dream to come true?A．Y es,because she expects to be a ballet dancer.B. Y es,because she isn’t frustrated by her illness.C. No,because she may not live long.D. No,because she is only 5 years old.12．In which way has Karmen done better than people had hoped?A．She is trying to dance well.B．She is able to speak and move about well.C．She doesn’t listen to the doctors. D．She can carry a walker.13．What was the change to Karmen when she wore the skirt?A．She became more beautiful. B．She seemed to grow taller.C．She got well from her illness. D．She looked like a ballet dancer.14．What do we learn from Karmen’s prayers?A．She is eager to become healthy and strong.B．She believes God can save her.C．She has no one to talk to.D．She hopes that God loves her.15．What does the writer want to tell us in the last paragraph?A.Children who are seriously ill need to be treated with more care and honesty B．It’s wrong to tell the children with serious illness the truth of their trouble.C．Children only want to talk to their families or friends when they are Seriously illD．Children expect to answer difficult questions and tell stories if they are seriously ill.DTaxes are a big part in the United States. Most Americans pay city taxes, state taxes, social security(安全) taxes, sales taxes…and the list seems endless. The biggest tax for most Americans is the incomes tax. The personal income tax is called a “progressive tax”, because it takes more from those who earn(挣钱) most. For example, a person who earns about ＄3,500 a year, will pay a tax of only about 3.5% of earning, but if the same person earned ＄85,000 a year, he would pay an income tax of 35%. Over years the incomes tax has become more and more difficult for people to understand. Almost one half of all Americans now have to pay experts to prepare their tax reports. In fact, preparing taxes and giving tax have become a big industry(工业) in America.16. Most Americans pay _______________.A taxes which are too many to listB taxes either to the cities or the states they live inC several kinds of taxesD so many kinds of taxes that they even don’t know the names17. Social security tax is collected from ___________.A those who have broken the lawB those who often make troubleC every people living in the area in questionD every person in America18. Which of the following is NOT true?A Americans have all kinds of taxes.B Personal income tax is the biggest tax in American.C The more a person earns, the more income tax he should pay.D Personal income tax can prevent the rich from getting richer.19. The so—called “progressive tax”is the tax ____________.A collected for social progressB that increases with each passing yearC that is collected from those who earn mostD that varies(变化) according to how much money a person earns20. Why have preparing and giving advice become a big industry in America? Because___.A the list of taxes seems endless.B they would rather spend their time and energy elsewhere.C they find their knowledge about taxes is too limited to write a tax report by themselvesD paying experts to prepare their tax reports and asking for tax have been very popularEIn Canada you can find dogs, cats, horses etc. in almost every family. These are their pets. People love these pets and regard them as their good friends. Before they keep them at their houses, they take them to animal hospitals to give them needles so that they won’t carry disease(疾病). They have special animal food stores, though they can get animal food in almost every store. Some people spend around two hundred Canadian dollars a month on animal food. When you visit people’s homes, they would be very glad to show you their pets and they are very proud of them. Y ou will also find almost every family has a bird feeder in their garden. All kinds of birds are welcomed to come and have a good meal. They are free to come and go and nobody is allowed to kill any animals in Canada. They have a law against killing wild(野生的) animals. If you killed an animal, you would be punished(处罚). If an animal happened to get run over by a car, people would be very sad about it.People in Canada have many reasons to like animals. One of them might be: Their family tie is not as close as ours. When children grow up, they leave their parents and start their own career(生涯). Then the seniors(老人) will feel lonely. But pets can solve this problem. They can be good friends and never leave them alone.21.This passage shows that Canadians __________.A. hate animalsB. often kill animalsC. love animalsD. don’t keep their pets inside their houses22.Children leave their parents when they grow up because __________.A. they don’t love their parents any more.B. they can only find jobs far from their parents.C. their parents’houses are too smallD. it is not acceptable(能接受的) to live together with their parents when they grow up.23.They give their pets needles before keeping them at their houses because __________.A. the pets are sickB. the pets are wildC. they want to stop them from carrying diseaseD. they want them to sleep on the way home24.Which is correct according to the passage?A. People buy animal food for their pets only at the animal food store.B. Pets eat better than people.C. Almost every family has a birdcage at his house.D. Any birds can come to the bird feeders to eat.25.The passage is mainly written about __________.A. how to keep disease from petsB. pets in CanadaC. how to take good care of petsD. life of the seniors in CanadaFBanbury House T el:564839Enjoying mixing with other students in pleasant accommodation 30 minutes from the station and close to all main bus routes.Single and double rooms.Students provide own food but all cleaning services offered.Please bring your own bed things.Three Seasons T el:445987We can provide all types of accommodation for all types of single student.Rooms are fully prepared with bed things and have reasonable prices .Full board possible.35---40minutes from main universities and the city.Sturtin Hostel T el:876333We offter beautiful views.It lies in pleasant countryside.Relax after a long day by swimming in the pool or using the exercise gym..Separate study rooms available.No children.Bar & restaurant.First Shop T el:223300Ideal for new students,we provide double rooms.If you wish,we can offer help in finding a suitable person to share a room with.All washing and cleaning services offered at extra rge canteen and three bathrooms on each floor.26.Which number would you ring if you are interested in sports?A.564839B.445987C.876333D.22330027._______offers help in finding a room—mate.A.Banbury HouseB.Three SeasonsC.Sturtin HostelD.First Shop28.If you live in Banbury House,you have to_______.A.do cooking by yourselfB.do cleaning by yourselfC. travel by trainD.take a school bus29.The articles above are mainly for_________.A.family accommodationB.student accommodationC.travel accommodationD.cheap accommodation30.The four texts above are most probably_______.A.lettersB.noticesC.invitationsD.advertisements。