北京城区一模单选分类练习

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2017年北京各区一模单选分类汇总(无答案).doc

2017年北京各区一模单选分类汇总(无答案).doc

D. had visited D. am makingD. will be booked 24. —You're so excited. Whafs up?(2017 年一模海淀)—I ______ as a volunteer in the coming Art Festival.A. had been acceptedB. have been acceptedC. had acceptedD. have accepted27. Chinese poetry ______ t he focus of attention in February, 2017 due to the hit TV show Chinese Poetry Conference. (2017 年一模海淀)A. is becomingB. has becomeC. becomesD. became 28. At this time tomorrow I ______ o n the beach in Sanya, enjoying the sunshine there.(2017 年一模海淀) A. will be lyingB. lieC. will lieD. am lying 31. Zhe ng He's ships _ the west coast of Africa long before Europea ns arrived there.(2017 年一模海淀)A. will visitB. have visitedC. would visit 22. —You often work overtime recently. Why?—Oh, I ____ money to buy a new car. (2017 年一模西城)A. madeB. had madeC. have made 30. —Is there a room available for tonight?—Sorry, sir, but all the rooms ____ ・(2017 年一模西城)A. have bookedB. have been bookedC. will book 32. Please put your laundry in the bag and we _____ some one to pick it up in a few minutes ・(2017年—模西城) A. will send B. have sent C. sent D. send21. —Hi, Jack. The summer holiday is coming. Have you any plan for the vacation? (2017 年一模东城) --Well. Probably we ______ abroad ・A. travelledB. have travelled C ・ will travel D. were travelling23. The fire _____ by the people in the neighbourhood before the firemen came. (2017 年一模东城)A. has been put outB. will be put outC. had been put outD. would be put out25. Jazz ____ a huge role around the world in opening up musical creativity since it came into being. (2017年一模东城)A. had playedB. has playedC. would playD. will play23. I didn't get in touch with David yesterday, since he ______ a meeting when I called ・ (2017 年一模初 阳)A. chairedB. was chairingC. had chairedD. would chair29. —Is Mr. Lewis still here? (2017 年一模朝阳)—No. He ______ here for about an hour and then left.A. isB. wasC. has beenD. would be33. Management has decided that workers ______ a ll changes well in advance. (2017 年一模朝阳)26. — Jack, what about the lecture ?(2017 年一模石景山)—It is the most inspiring lecture that I _______ since I came to this university.A. attendedB. have attendedC. am attendingD. had attended29. —Joan, what _______ in your hand? —Look! Its a birthday gift for my grandma. (2017 年一模石景山)A. are you holdingB. had you heldC. do you holdD. will you hold32. When residents learned that only one of the 13 workers trapped underground ______ , they burst into tears. (2017 年一模石景山)A. will be rescuedB. is rescuedC. has been rescuedD. had been rescued21. Congratulations on the great progress you ________ since last year. (2017 年一•模丰台)A. makeB. have madeC. were makingD. will have made23. —Have I filled out the application correctly, Mr. Smith? (2017 年一模丰台)—Well, you _____ o ne question here.A. missedB. missC. will missD. are missing30. The delivery of the goods _______ because of the heavy snow storm.(2017 年一模丰台)A. is putting offB. was put offC. had been put offD. would put off25. It _______ for two weeks, and the whole area is flooded.(2017 年一模丰台)A. had rainedB. rainsC. would rainD. has been raining非谓语动词25. Like great athletes or scientists, great teachers have the ability ___ o thers as well. (2017 年一模海淀)A. inspiri ngB. inspireC. inspiredD. to in spire26. The newly-published dictionary will be of great help to foreigners ____ Chinese・(2017 年一模海淀)A. learnB. learntC. learningD. having learnt29. When ____ in a traffic jam, I often listen to my favorite music to relax. (2017 年一模海淀)A. trappingB. trappedC. to trapD. having trapped24. Our team defeated Class 3 in the basketball match on Wednesday, _____ t hem 36 to 35.(2017 年—模西城)A. beatingB. beatC. to beatD. beaten27. ___ all the details, you have to look at the picture carefully.(2017 年一模西城)A. GraspedB. GraspingC. GraspD. To grasp34. In this library, you can use your own computer to connect to Wi-Fi specially _____forreaders. (2017 年一模西城)A. preparingB. to prepareC. preparedD. prepare26. Cambridge, _____ in the 12th century, holds a leading position in science in modern times. (2017年一模东城)A. to foundB. foundingC. foundD. founded30. ____ all morning doing the experiment in the lab, John took a short lunch break. (2017 年一模东城)A. SpendingB. Having spentC. To have spentD. Spend34. She Ionged for the holidays ______ s o that she could be with her family again. (2017 年-模东城)A. to comeB. comi ng C・ come D. to have come28. You should answer the questions _____ the information on your card. (2017 年一•模朝阳)A. usedB. usingC. to useD. being used30. Last month we spent so much to have the roof _____ , for it always leaked when it rained. (2017年一模朝阳)A. replacedB. replacing C・ to replace D. being replaced32. —Any predictions for the election? (2017 年一•模朝阳)—Well, James is thought ______ a sure winner.A. to beB. to have beenC. beingD. having been27. Group work is often organized in class _______ students develop team spirit. (2017 年—模石景山)A. helpingB. having helpedC. helpedD. to help30. ______ at the restaurant before, Johnson didn't want to go there anymore・(2017 年一•模石景山)A. Having eatenB. To eatC. EatD. Eating33. When _______ for his views about New Year's greeting movies, Professor Wang said most of them were boring. (2017 年—•模石景山)A. askingB. askedC. having askedD. to be asked26. Ifs an excellent job offer. Don't let such a good opportunity ________ through your fingers. (2017年一模丰台)A. slippedB. to slipC. slipD. slipping28. When ________ , the project will help to greatly improve the air quality in the community. (2017 年一•模丰台)A. finishingB. to finishC. finishD. finished32. ________ w hich club to attend, Jane asked her friends for advice・(2017 年一模丰台)A. Not knowingB. Not knowC. Not knownD. Not to know虚拟语气35. Waiters are requested to treat every customer as if they __ guests in their own house.(2017 年一模海淀)A. areB. wereC. would beD. had been35. What a sunny day! How I wish I ____ on the beach enjoying the sunshine now!(2017 年-•模西城)A. wereB. had beenC. would beD. should be28. If we ______ repeated attempts, we would n't have succeeded. (2017 年一•模东城)A. haven't madeB. hadn't made C・ didn't make D. would n't make35. —Did you enjoy your trip? (2017 年一模朝阳)—Yes. But for your advice, we ______ our stay in London half as much.A. didn't enjoyB. hadn't enjoyedC. wouldn't enjoyD. wouldn't have enjoyed34.1 wish I ________ t he lecture yesterday, but I missed it.(2017 年一模丰台)A. had attendedB. would attend C・ have attended D. attended情态动词34. — Could we phone our English teacher now? (2017 年—•模海淀)—Not now. Tm afraid he ______ be driving・A. shallB. mayC. willD. can29. There are so many special offers and bargains during Spring Festival that you ____ surely getwhat you want for much less money.(2017 年一模西城)A. mightB. canC. needD. have to32.・-Last week I bought a bike, but today my uncle gave me one for my birthday. (2017 年一模东城)・-Oh, so you ____ have bought it.A. need n'tB. must n'tC. can'tD. may not26. If you _____ have a cigarette, choose a seat in the first row of the smoking section. (2017 年一模初阳)A. shouldB. mustC. mightD. would28. I _______ h ave watched that movie一it gives me horrible dreams. (2017 年—•模石景山)A. shouldn'tB. needn'tC. couldn5tD. mustn't31. Life is not predictable; even the worst ________ b ecome the best. (2017 年—•模丰台)A. shallB. mightC. mustD. need定语从句22. Mobike is a popular service ______ brings convenience to us. (2017 年一模海淀)A. whichB. where C・ when D. who31. People living in homes ____ TV is always left on often spend less time reading. (2017 年一模西城)A. thatB. whichC. whereD. who22. We were grateful to Mr. Marks, in __ car we had travelled home on the rainy night. (2017 年一•模东城)A. whichB. whomC. thatD. whose25. I got the kids to clean the house this morning, _____ made a great break for me. (2017 年一模朝阳)A. thatB. whenC. whereD. which22. He wrote a letter ______ he explained what had happed in the accident. (2017 年一模石景山)A. whatB. whichC. howD. where34. The number of various educational programs, ______ important roles have been realized by more and more people, has a rapid growth these years・(2017 年一模石景山)A. whoseB. whereC. whichD. that22. Accordi ng to the author, those _______ enjoy readi ng will never feel I on ely. (2017 年一模丰台)A. whenB. whoC. whereD. which35. We really appreciate our learning environment, ___________ we can have open and friendlycommunication. (2017 年一•模丰台)A. whoseB. which C・ where D. what状语从句30. Enjoying a fresh morning is important __ it can set the mood for the rest of the day・(2017 年一模海淀)A. unlessB. ifC. becauseD. although28. The amusement park will stay open through mid-March, ____ t he weather cooperates. (2017 年一模西城)A. unlessB. even ifC. so thatD. as long as27. _______ t he prices of household robots have come down, many consumers still can't afford them. (2017年一模东城)A. WhileB. BecauseC. UntilD. If24. Going camping in the desert will not be enjoyable ______ y ou have prepared thoroughly. (2017 年一模朝阳)A. becauseB. when C・ unless D. until24. Tm terribly sorry to have kept you waiting so long, but ifll still be some time ____ Tony gets back. (2017年一模右呆山)A. afterB. sinceC. tillD. before27. The sponsors agreed that they would support us ______we didn't break the rules. (2017 年一模丰台)A. as well asB. as soon asC. as far asD. as long as名词性从句32. Have you ever wondered _____ you can feel the wind but cannot see it?(2017 年一模海淀)A. whyB. howC. whatD. whether23. It is entirely true _____ children learn more from people they like. So, try to be friends withthem. (2017年一模西城)A. whatB. whyC. thatD. how26. The results of the experiment turned out contrary to ____ was expected.(2017 年-模西城)A. whatB. whichC. whomD. that24. ____ we'll do is to leave a note for Mum to tell her we won't be back till late. (2017 年一模东城)A. WhatB. ThatC. HowD. Why29. In times of trouble or difficulty, one may take _____ help is available. (2017 年—•模东城)A. whoeverB. however C・ whatever D. wherever35. The real problem is not just that troubles come, but _____ we don't know how to meet them. (2017 年一模东城)A. whyB. thatC. whenD. what27. The shocking news made us realize _____ terrible problems we would face. (2017 年一模朝阳)A. whyB. howC. whatD. that31. My job is very enjoyable・ That is ___ I spend a great deal of time and patienee.(2017 年-模朝阳)A. whatB. howC. whenD. why34. It will come out ______ she has donated quite a lot of money to cancer research. (2017 年一模朝阳)A. thatB. whatC. whichD. when25. All the passengers are worrying about ______ the flight will take off on time. (2017 年一模石景山)A. whyB. whetherC. thatD. when31. _______ Stephen Chow shows to his fans is his honesty and sense of humor. (2017 年一-模石景山)A. WhichB. ThatC. WhatD. Whom24. The key point is not who said the words, but _______ they are true or not.(2017 年一模丰台)A. whatB. whenC. thatD. whether29. _______ they should do about the hole in their roof is their most pressing problem・(2017 年一模丰台)A. ThatB. How oftenC. WhatD. Why代词21. —What do you think of the two desig ns?(2017 年一模海淀)—Frankly, I like _____ of them. Please show me a third one.A. anyB. eitherC. neitherD. both25. Dancing with the feet is one thing, but dancing with the heart is ____ .(2017 年一模西城)A. oneB. otherC. othersD. another22. —When shall I come to see you, in the morning or afternoon? (2017 年一模朝阳)— _____ . Ill be at home all day.A. EitherB. NeitherC. BothD. None介词23. Your attitude _____ life determines how happy or unhappy you are. (2017 年一模海淀)A. towardsB. withC. onD. for33. You will never say “no” when a little kid is looking at you ___ c omfort and support. (2017 年一模西城)A. onB. forC. beyondD. at21. The accident is my fault, so I had to pay for the damage ______ the other car. (2017 年一模石景山)A. byB. atC. toD. on并列句33. My mother wants to decorate our rooms in a modern look _______ my father prefers a traditional style. (2017 年一模海淀)A. as long asB. as C・ while D. now that21. I really don't know whether I can succeed in the final competition, _____ I will try. (2017 年一模西城)A. andB. forC. butD. or33. The accident was the young man's fault, ______ he had to pay for the damage to the other car. (2017年一模东城)A. forB. orC. butD. so21. She had liked detective novels at first, _____ soon lost interest. (2017 年一模朝阳)A. forB. soC. orD. but形容词31. It is said that California feeds the USA ________ fruits and vegetables than any other state. (2017 年一模东城)A. muchB. many C・ more D. most35. It is said the city is now ______ large as what it was. (2017 年一•模石景山)A. as twiceB. twice asC. twice muchD. much twice21. Congratulations on the great progress you _________ since last year.A. makeB. have madeC. were makingD. will have made22. Accordi ng to the author, those _______ enjoy reading will never feel I on ely.A. whenB. whoC. whereD. which23. —Have I filled out the application correctly, Mr. Smith? —Well, you ____ one question here.A. missedB. miss C・ will miss D. are missing24. The key point is not who said the words, but _______ they are true or not.A. whatB. whenC. thatD. whether25. It _______ for two weeks, and the whole area is flooded・A. had rainedB. rains C・ would rain D. has been raining26. Ifs an excellent job offer. Don5t let such a good opportunity ________ t hrough your fingers.A. slippedB. to slipC. slipD. slipping27. The sponsors agreed that they would support us ________ w e didn't break the rules.A. as well asB. as soon asC. as far asD. as long as28. When ________, the project will help to greatly improve the air quality in the comm unity.A. finishingB. to finishC. finishD. finished29. _______ t hey should do about the hole in their roof is their most pressing problem.A. ThatB. How oftenC. WhatD. Why30. The delivery of the goods _______ because of the heavy snow storm.A. is putting offB. was put offC. had been put offD. would put off31. Life is not predictable; even the worst ________ become the best.A. shallB. mightC. mustD. need32. _______ w hich club to attend, Jane asked her friends for advice・A. Not knowingB. Not knowC. Not knownD. Not to know33. —Have you seen the film Avatar?—Of course, I have. It was in our hometown ________ the film was made.A. whenB. whyC. thatD. which34. I wish I ________ the lecture yesterday, but I missed it.A. had attendedB. would attendC. have attendedD. attended35. We really appreciate our learning environment, ___________ we can have open and friendlycommunicati on.A. whoseB. which C・ where D. what21. —What do you think of the two designs?—Frankly, I like ______ of them. Please show me a third one.A. anyB. eitherC. neitherD. both22. Mobike is a popular service _____ brings convenience to us.A. whichB. where C・ when D. who23. Your attitude ______ life determines how happy or unhappy you are.A. towardsB. withC. onD. for24. —You5re so excited. Whafs up?—I ______ as a volunteer in the coming Art Festival.A. had been acceptedB. have been acceptedC. had acceptedD. have accepted25. Like great athletes or scientists, great teachers have the ability ______ others as well・A. inspiri ngB. inspireC. inspiredD. to in spire26. The newly-published dictionary will be of great help to foreigners ______ Chinese.A. learnB. learntC. learningD. having learnt27. Chinese poetry ______ the focus of attention in February, 2017 due to the hit TV show ChinesePoetry Conference.A. is becomingB. has becomeC. becomesD. became28. At this time tomorrow I ______on the beach in Sanya, enjoying the sunshine there.A. will be lyingB. lieC. will lieD. am lying29. When _____ in a traffic jam, I often listen to my favorite music to relax.A. trappingB. trappedC. to trapD. having trapped30. Enjoying a fresh morning is important _____ it can set the mood for the rest of the day.A. unlessB. ifC. becauseD. although31. Zheng He's ships _____ the west coast of Africa long before Europeans arrived there.A. will visitB. have visitedC. would visitD. had visited32. Have you ever wondered ______ y ou can feel the wind but cannot see it?A. whyB. howC. whatD. whether33. My mother wants to decorate our rooms in a modern look _______ my father prefers a traditionalstyle ・A. as long asB. as C・ while D. now that34. — Could we phone our English teacher now?—Not now. Tm afraid he ______ be driving・A. shallB. mayC. willD. can35. Waiters are requested to treat every customer as if they _____ guests in their own house.A. areB. wereC. would beD. had been2017年一模西城21.1 really don't know whether I can succeed in the final competition, ____ I will try.A. andB. forC. butD. or22. —You often work overtime recently. Why?—Oh, I ____ money to buy a new car.A. madeB. had madeC. have madeD. am making23. It is entirely true ____ children learn more from people they like. So, try to be friends withthem.A. whatB. whyC. thatD. how24. Our team defeated Class 3 in the basketball match on Wednesday, ____ them 36 to 35.A. beatingB. beatC. to beatD. beaten25. Dancing with the feet is one thing, but dancing with the heart is _____ ・A. oneB. otherC. othersD. another26. The results of the experiment turned out contrary to _____ w as expected.A. whatB. whichC. whomD. that27. ____ all the details, you have to look at the picture carefully.A. GraspedB. GraspingC. GraspD. To grasp28. The amusement park will stay open through mid・March, ___ the weather cooperates.A. unlessB. even ifC. so thatD. as long as29. There are so many special offers and bargains during Spring Festival that you ____ surely getwhat you want for much less money.A. mightB. canC. needD. have to30. —Is there a room available for tonight?—Sorry, sir, but all the rooms ____ ・A. have bookedB. have been bookedC. will bookD. will be booked31. People living in homes _____ T V is always left on often spend less time reading.A. thatB. whichC. whereD. who32. Please put your laundry in the bag and we ____ someone to pick it up in a few minutes・A. will sendB. have sentC. sentD. send33. You will never s ay “no” when a little kid is looking at you____ comfort and support.A. onB. forC. beyondD. at34. In this library, you can use your own computer to connect to Wi-Fi specially ____ forreaders.A. preparingB. to prepareC. preparedD. prepare35. What a sunny day! How I wish I _____ on the beach enjoying the sunshine now!A. wereB. had beenC. would beD. should be2017年一模东城21. ・-Hi, Jack. The summer holiday is comi ng. Have you any plan for the vacation?—Well. Probably we ______ abroad・A. travelledB. have travelledC. will travelD. were travelling22. We were grateful to Mr. Marks, in _______ c ar we had travelled home on the rainy night.A. whichB. whomC. thatD. whose23. The fire ______ b y the people in the neighbourhood before the firemen came.A. has been put outB. will be put outC. had been put outD. would be put out24. _____ well do is to leave a note for Mum to tell her we won't be back till late・A. WhatB. ThatC. HowD. Why25. Jazz ___ a huge role around the world in opening up musical creativity since it came into being.A. had playedB. has playedC. would playD. will play26. Cambridge, _____ in the 12th century, holds a leading position in science in modern times.A. to foundB. founding C・ found D. founded27. ______ the prices of household robots have come down, many consumers still can't afford them.A. WhileB. BecauseC. UntilD. If28. If we _____ repeated attempts, we would n't have succeeded.A. haven't madeB. hadn't made C・ didn't make D. would n't make29. In times of trouble or difficulty, one may take ______ h elp is available.A. whoeverB. howeverC. whateverD. wherever30. ____ a ll morning doing the experiment in the lab, John took a short lunch break.A. SpendingB. Having spent C・ To have spent D. Spend31. It is said that California feeds the USA _____ fruits and vegetables than any other state.A. muchB. many C・ more D. most32. —Last week I bought a bike, but today my uncle gave me one for my birthday.・-Oh, so you _____ have bought it・A. need n'tB. must n'tC. can'tD. may not33. The accident was the young man's fault, ______ he had to pay for the damage to the other car.A. forB. orC. butD. so34. She Ionged for the holidays _____ so that she could be with her family again.A. to comeB. comi ng C・ come D. to have come35. The real problem is not just that troubles come, but ______ w e don't know how to meet them.A. whyB. thatC. whenD. what2017年一模朝阳21. She had liked detective novels at first, _____ soon lost interest.A. forB. soC. orD. but22. —When shall I come to see you, in the morning or afternoon?— _____ . Ill be at home all day.A. EitherB. NeitherC. BothD. None23. I didn't get in touch with David yesterday, since he _____ a meeting when I called・A. chairedB. was chairingC. had chairedD. would chair24. Going camping in the desert will not be enjoyable ______ y ou have prepared thoroughly.A. becauseB. when C・ unless D. until25. I got the kids to clean the house this morning, _____ made a great break for me.A. thatB. whenC. whereD. which26. If you _____ have a cigarette, choose a seat in the first row of the smoking section.A. shouldB. mustC. mightD. would27. The shocking news made us realize ______ terrible problems we would face.A.whyB. howC. whatD. that28. You should answer the questions _____ the information on your card・A. usedB. usingC. to useD. being used29. —Is Mr. Lewis still here?—No. He ______ h ere for about an hour and then left.A. isB. wasC. has beenD. would be30. Last month we spent so much to have the roof _____ , for it always leaked when it rained.A. replacedB. replacingC. to replaceD. being replaced31. My job is very enjoyable. That is _____ I spend a great deal of time and patience・A. whatB. howC. whenD. why32. —Any predict!ons for the election?—Well, James is thought ______ a sure winner.A. to beB. to have beenC. beingD. having been33. Management has decided that workers ______ all changes well in advanee.A. will inform ofB. have informed ofC. will be informed ofD. have been informed of34. It will come out _____ she has donated quite a lot of money to cancer research.A. thatB. whatC. whichD. when35. —Did you enjoy your trip?—Yes. But for your advice, we ______ our stay in London half as much.2017年一模石景山21. The accident is my fault, so I had to pay for the damage ______ the other car.A. byB. atC. toD. on22. He wrote a letter ______ he explained what had happed in the accident.A. whatB. whichC. howD. where23. I can*t remember when ______ turning point occurred exactly, but it might be _______summer morning during my vacation.A. /; aB. a; aC. the; aD. a; the24. I'm terribly sorry to have kept you waiting so long, but ifll still be some time ____ Tony gets back.A. afterB. sinceC. tillD. before25. All the passengers are worrying about ______ the flight will take off on time.A. whyB. whetherC. thatD. when26. — Jack, what about the lecture ?—It is the most inspiring lecture that I ________ since I came to this university.A. attendedB. have attendedC. am attendingD. had attended27. Group work is often organized in class ______ students develop team spirit.A. helpingB. having helpedC. helpedD. to help28. I _______ h ave watched that movie—it gives me horrible dreams.A. shouldn'tB. needn'tC. couldn'tD. mustn't29. —Joan, what _______ i n your hand? —Look! Ifs a birthday gift for my grandma・A. are you holdingB. had you heldC. do you holdD. will you hold30. ______at the restaurant before, Johnson didn't want to go there anymore・A. Having eatenB. T D eatC. EatD. Eating31 ・ _____Stephen Chow shows to his fans is his honesty and sense of humor.A. WhichB. ThatC. WhatD. Whom32. When residents learned that only one of the 13 workers trapped underground _______ , they burstinto tears.A. will be rescuedB. is rescuedC. has been rescuedD. had been rescued33. When _______ for his views about New Year's greeting movies, Professor Wang said most ofthem were boring.A. askingB. askedC. having askedD. to be asked34. The number of various educational programs, ______ important roles have been realized bymore and more people, has a rapid growth these years.A. whoseB. whereC. whichD. that35. It is said the city is now ______ large as what it was.A. as twiceB. twice asC. twice muchD. much twice。

2023年北京市各地九年级数学中考一模试题分类选编:投影与视图

2023年北京市各地九年级数学中考一模试题分类选编:投影与视图

2023年北京市各地九年级数学中考一模试题分类选编:投影与视图一、单选题1.(2023·北京东城·统考一模)下列四个几何体中,主视图为三角形的是()A.B.C.D.2.(2023·北京丰台·统考一模)下面几何体中,主视图是圆的是()A.B.C.D.3.(2023·北京延庆·统考一模)下列几何体的主视图和俯视图完全相同的是()A.B.C.D.4.(2023·北京海淀·统考一模)下列几何体中,主视图为下图的是()A.B.C.D.5.(2023·北京·校考模拟预测)下列立体图形中,从正面看,看到的图形是圆形的是()A.B.C.D.6.(2023·北京·校考模拟预测)如图是某几何体的主视图、左视图和俯视图,则该几何体是()A.球B.圆柱C.圆锥D.长方体7.(2023·北京海淀·北理工附中校考模拟预测)如图是某个几何体的三视图,该几何体是()A.三棱柱B.圆柱C.三棱锥D.长方体8.(2023·北京顺义·统考一模)如图是某几何体的三视图,该几何体是()A.圆柱B.三棱柱C.长方体D.圆锥9.(2023·北京海淀·中关村中学校考模拟预测)如图所示是一个由五个同样大小的正方体小块组成的立体图形,则下列不是它的三视图之一的是()A.B.C.D.10.(2023·北京大兴·统考一模)如图所示的圆柱,其俯视图是()A.B.C.D.11.(2023·北京朝阳·统考一模)如图是某几何体的三视图,该几何体是()A.长方体B.三棱柱C.圆锥D.圆柱12.(2023·北京海淀·首都师范大学附属中学校考一模)如图的几何体是由一些小正方体组合而成的,则这个几何体的左视图是()A.B.C.D.13.(2023·北京海淀·清华附中校考一模)如图是某几何体的视图,该几何体是()A.圆柱B.球C.三棱柱D.长方体14.(2023·北京东城·北京市广渠门中学校考一模)如图是某个几何体的三视图,该几何体是()A.长方体B.圆锥C.三棱柱D.圆柱15.(2023·北京海淀·校考一模)如图是几何体的三视图,该几何体是A.圆锥B.圆柱C.正三棱柱D.正三棱锥16.(2023·北京海淀·校联考模拟预测)下列立体图形中,主视图是三角形的是().A.B.C.D.17.(2023·北京西城·北京育才学校校考模拟预测)如图是某几何体的三视图,该几何体是()A.三棱柱B.长方体C.圆锥D.圆柱18.(2023·北京朝阳·清华附中校考模拟预测)一个几何体的三视图如图所示,则这个几何体是()A.B.C.D.参考答案:1.C【分析】根据主视图是从正面看到的图形进行求解即可.【详解】解:A、球的主视图为圆,不符合题意;B、圆柱的主视图为长方形,不符合题意;C、圆锥的主视图为三角形,符合题意;D、正方体的主视图为正方形,不符合题意;故选C.【点睛】本题主要考查了简单几何体的三视图,熟知主视图是从正面看到的图形是解题的关键.2.D【分析】根据几何体的主视图是否为圆进行判断即可.【详解】A、主视图是长方形,故本选项不符合题意;B、主视图是等腰三角形,故本选项不符合题意;C、主视图是等腰三角形,故本选项不符合题意;D、主视图是圆,故本选项符合题意;故选:D.【点睛】本题主要考查了三视图,解题的关键是掌握从正面看到的图形是主视图.3.D【分析】主视图、俯视图是分别从物体正面、上面看,所得到的图形.【详解】解:A、主视图是矩形,俯视图是圆,故本选项不合题意;B、主视图是等腰三角形,俯视图是带圆心的圆,故本选项不合题意;C、主视图是矩形,俯视图是三角形,故本选项不合题意;D、主视图和俯视图完全相同,是等圆,故本选项符合题意.故选:D.【点睛】本题考查了几何体的三种视图,掌握定义是关键.注意所有的看到的棱都应表现在三视图中.4.A【分析】在正面内得到的由前向后观察物体的视图,叫做主视图;再结合常见几何体的主视图特征判断即可【详解】解:A.主视图为矩形,符合题意;B.主视图为三角形,不符合题意;C.主视图为有一公共边的两个三角形,不符合题意;D.主视图为圆,不符合题意;故选:A.【点睛】本题考查了主视图的概念,牢记观察方向是解题关键.5.A【分析】根据题意先从正面观看图像即可得到答案.【详解】解:A选项从正面看是个圆形,符合题意;B选项从正面看是个长方形,不符合题意;C选项从正面看是个三角形,不符合题意;D选项从正面看是个正方形,不符合题意;故选A.【点睛】本题主要考查几何体的三视图,关键是掌握主视图的观看位置.6.C【分析】根据主视图与左视图是三角形,俯视图是圆,即可得出该几何体是圆锥,据此即可求解.【详解】解:∵主视图与左视图是三角形,俯视图是圆,∵该几何体是圆锥,故选:C.【点睛】本题考查了根据三视图还原几何体,掌握常见几何体的三视图是解题的关键.7.A【分析】根据主视图和左视图确定为矩形判断出是柱体,根据俯视图判断出这个几何体是三棱柱,即可得.【详解】解:∵主视图和左视图是矩形,∵该几何体是柱体,∵俯视图是三角形,∵该几何体是三棱柱;故选:A.【点睛】本题考查通过三视图还原几何体.熟练掌握常见几何体的三视图,是解题的关键.8.A【分析】根据主视图和左视图都是高度相等的长方形,可判断该几何体是柱体,进而根据俯视图的形状,可判断柱体底面形状,得到答案.【详解】解:∵几何体的主视图和左视图都是高度相等的长方形,故该几何体是一个柱体,又∵俯视图是一个圆形,故该几何体是一个圆柱,故选:A.【点睛】本题考查的知识点是三视图,如果有两个视图为三角形,该几何体一定是锥,如果有两个矩形,该几何体一定柱,其底面由第三个视图的形状决定.9.B【分析】根据简单组合体的三视图进行判断即可.【详解】解:这个组合体的三视图如图所示:因此选项B中的图形不是它的三视图,故选:B.【点睛】本题考查简单组合体的三视图,掌握视图的意义是正确判断的前提.10.A【分析】圆柱体的顶部是一圆,圆柱体的俯视图应为一个圆.【详解】∵圆柱体的顶部是一个圆∵圆柱体的俯视图应为一个圆A选项是一个圆,是圆柱体的俯视图B选项是长方形,不符合题意C选项是长方形,不符合题意D选项不是圆,不符合题意故选:A.【点睛】本题考查几何体的三视图,从不同的方向抽象出几何体的形状是解决问题的关键.11.A【分析】结合长方体的三视图特征判断即可;【详解】解:∵长方体的三视图都是长方形;三棱柱的三视图中有三角形;圆锥和圆柱的三视图中有圆;∵该几何体符合长方体的三视图特征,故选:A.【点睛】本题考查了三视图:在正面内得到的由前向后观察物体的视图,叫做主视图;在水平面内得到的由上向下观察物体的视图,叫做俯视图;在侧面内得到的由左向右观察物体的视图,叫做左视图;掌握常见几何体的三视图特征是解题关键.12.B【分析】根据左视图是从左面看得到的图形,可得答案.【详解】解:从左边看,上面一层是一个正方形,下面一层是两个正方形,故选B【点睛】本题考查了简单组合体的三视图,从左面看得到的图形是左视图,掌握三视图的有关定义是解题的关键.13.A【分析】根据主视图和左视图都是高度相等的长方形,可判断该几何体是柱体,进而根据俯视图的形状,可判断柱体底面形状,得到答案.【详解】解:∵几何体的主视图和左视图都是高度相等的长方形,故该几何体是一个柱体,又∵俯视图是一个圆形,故该几何体是一个圆柱,故选A.【点睛】题考查的知识点是三视图,如果有两个视图为三角形,该几何体一定是锥,如果有两个矩形,该几何体一定柱,其底面由第三个视图的形状决定.14.D【分析】首先根据俯视图排除正方体、三棱柱,然后跟主视图和左视图排除圆锥,即可得到结论.【详解】∵俯视图是圆,∵排除A和C,∵主视图与左视图均是长方形,∵排除B,故选:D.【点睛】本题主要考查了简单几何体的三视图,用到的知识点为:三视图分为主视图、左视图、俯视图,分别是从物体正面、左面和上面看,所得到的图形.15.C【详解】由展开图的特点知识是三棱柱的展开图.故选C.16.B【分析】根据从正面看得到的图形是主视图,可得图形的主视图.【详解】A、C、D主视图是矩形,故A、C、D不符合题意;B、主视图是三角形,故B正确;故选B.【点睛】本题考查了简单几何体的三视图,圆锥的主视图是三角形.17.B【详解】试题解析:根据主视图和左视图都是宽度相等的长方形,可判断该几何体是柱体,再根据俯视图的形状,可判断柱体是长方体.故选B.18.C【分析】根据俯视图为三角形,主视图以及左视图都是矩形,可得这个几何体为三棱柱.【详解】解:A的俯视图是圆,故不符合题意;B的俯视图是正方形,不符合题意;C的主视图是两个矩形,俯视图是三角形,左视图是矩形,故符合题意;D的左视图是三角形,故不符合题意;故选C.。

2023年北京市九年级物理中考一模试题分类选编:电流和电路

2023年北京市九年级物理中考一模试题分类选编:电流和电路

2023年北京市九年级物理中考一模试题分类选编:电流和电路一、单选题1.(2023·北京门头沟·统考一模)下图是用带电小球探究电荷间相互作用规律的实验装置,其中符合事实的是()A.B.C.D.2.(2023·北京丰台·统考一模)通常情况下,下列物质属于导体的是A.橡胶B.玻璃C.塑料D.金属3.(2023·北京丰台·校联考一模)以下物质,通常情况下属于绝缘体的是()A.人体B.铅笔芯C.橡胶手套D.不锈钢尺4.(2023·北京房山·统考一模)如图所示的实验中,用丝绸摩擦过的玻璃棒接触验电器的金属球时,验电器的两片金属箔之所以张开是因为()A.同种电荷相互排斥B.异种电荷相互吸引C.同种电荷相互吸引D.异种电荷相互排斥5.(2023·北京延庆·统考一模)如图所示电路中,当开关闭合后,会导致电源被短路的是()A.B.C.D.6.(2023·北京·北师大实验中学校考模拟预测)小明家的卫生间里安装了如图所示的风暖浴霸,它可以单独照明、单独取暖和单独吹风。

当闭合照明开关S1 时,灯L发光;当断开开关S1、闭合取暖开关S2和吹气开关S3时,发热元件R 实现供暖,同时电机M 工作带动空气流动使室内升温。

小明根据上述功能设计了如图所示的四个简化模拟电路图,其中正确的是()A.B.C.D.7.(2023·北京延庆·统考一模)图示的情境中,下列说法中正确的是()A.利用摩擦的方法可使塑料带有磁性B.用橡胶棒把验电器A和B连接起来,B的金属箔也会张开C.图示,两支外形相同的玻璃棒带电后,靠近时会相互排斥D.图表明,自由电子的定向移动方向为电流方向8.(2023·北京·北京市陈经纶中学分校校考一模)家用厨房抽油烟机主要是由排气扇和照明灯泡组成,它们既能同时工作,又能分别独立工作。

18北京一模分类单选汇编(含答案)

18北京一模分类单选汇编(含答案)

2018中考物理满分之选专题复习一一、选择题1、若四次测量一本书的宽度记录为:12.38cm ,12.36cm ,12.38cm ,12.34cm ,则这本书宽度平均值是( )A .12.38cmB .12.365cmC .12.36cmD .12.37cm2、关于机械运动的概念,下列说法是错误的是( )A .平常所说的运动和静止都是相对于参照物来说的B .所谓参照物就是我们假设不动的物体,以它作为参考研究其它物体运动情况C .选取不同的参照物来描述同一物体的运动,其结果可以是不同的D .研究物体运动,选择地面做参照物最适宜,因为地面是真正不动的物体3、某火车站并列停靠着甲、乙两列火车,甲车上的乘客突然发现自己所在的列车向东运动了,关于两列火车运动情况的说法可能的是( )A.甲车不动,乙车向东 B.甲车不动,乙车向西C.甲车向西,乙车不动 D.甲车向西,乙车向东4、甲、乙、丙三人骑自行车匀速行驶,甲在1h 内行驶15km ;乙在3min 内行驶750m ;丙行驶100m 需24s .则三人骑车速度的快慢为( )A .甲最快,丙最慢B .甲最慢,丙最快C .乙最快,甲最慢D .三人一样快5、用调好的托盘天平称物体的质量时,发现指针偏向分度盘中线的右边,这时应该( )A .将横梁右端的螺母向左调B .将横梁右端的螺母向右调C .减少盘中的砝码D .向右调节游码6、对于同种物质而言,关于密度的公式“ρ=vm ”下列说法正确的是( ) A .ρ与m 成正比 B .ρ与m 、v 没有关系,是个恒定值C .ρ与v 成反比D .ρ与m 成正比,ρ与v 成反比7、在平整地面上有一层厚度均匀的积雪,小明用力向下踩,形成了一个下凹的脚印,如图所示.脚印下的雪由于受外力挤压可近似看成冰层,利用冰的密度,只要测量下列哪组物理量,就可以估测出积雪的密度?( )A .积雪的厚度和脚印的深度B .积雪的厚度和脚印的面积C .冰层的厚度和脚印的面积D .脚印的深度和脚印的面积8、下列实例中,体现力改变物体运动状态的是( )A .用力拉弹簧,弹簧变长B .把橡皮泥捏成不同造型C .滚动的足球受阻力缓缓停下D .被拉弯的鱼竿9、关于力的概念,下列哪句话是错误的( )A .没有物体就没有力B .有受力物体时,一定有施力物体C .有施力物体时,可以不一定有受力物体D .只有一个物体时,不会有力10、在航空领域,常常发生小鸟撞毁飞机事件,下列关于小鸟和飞机相撞时的说法正确的是( )A. 小鸟受到的力大B. 主动撞击的一方产生的力大C. 飞机受到的力大D. 小鸟和飞机的受力一样大11、走进温馨的物理考场,回想自身经历,下面是与你有关的一些数据,你认为合理的是( )A .手掌宽度为5dmB .百米赛跑的速度可达15m/sC .身体的体积为50dm 3D .体重为50N12、如图所示,一根弹簧,一端固定在竖直墙上,在弹性限度内用手水平向右拉伸弹簧的另一端,下列有关“弹簧形变产生的力”的描述正确的是()A.手对弹簧的拉力 B.弹簧对手的拉力C.墙对弹簧的拉力 D.以上说法都不正确13、一根长8cm的弹簧,当所受拉力8N时,长度变为12cm,当长度变为14cm时所受拉力是()A.10N B.12N C.14N D.20N14、用天平和弹簧测力计分别在地球和月球上测同一物体,测量的结果是()A.天平弹簧测力计测的都相同 B.天平测的相同,弹簧测力计测的不同C.天平测的不同,弹簧测力计测的相同 D.天平、弹簧测力计测的都不同15、过春节时贴年画是我国的传统习俗.在竖直墙壁上贴长方形年画时,可利用重垂线来检查年画是否贴正.如图所示的年画的长边与重垂线不平行,为了把年画贴正,则下列操作方法中正确的是()A.换用质量大的重锤B.上下移动年画的位置C.调整年画,使年画的长边与重垂线平行D.调整重垂线,使重垂线与年画的长边平行16、如图中甲、乙、丙、丁四根弹簧完全相同,甲、乙左端固定在墙上,图中所示的力F均为水平方向,大小相等,丙、丁所受的力均为一条直线上,四根弹簧在力的作用下均处于静止状态,其长度分别是L甲、L乙、L丙、L丁,下列选项正确的是()A.L甲<L丙L乙>L丁B.L甲=L丙 L乙=L丁C.L甲<L丙L乙=L丁D.L甲=L丙 L乙>L丁17、关于比值9.8N/kg所表示的物理意义是()A.9.8N等于1kg B.9.8kg等于1NC.质量是9.8kg的物体受到的重力是1N D.质量是1kg的物体受到的重力是9.8N18、下列生活现象中,属于利用惯性的是()A.赛车在转弯时滑出赛道 B.高速路上汽车要限速行驶C.人踩到西瓜皮上易滑倒 D.跳远运动员跳远时要助跑19、行驶的车辆突然刹车时如图所示,人向前倾的原因是()A.车辆对人施加一个向前的力 B.车辆具有惯性C.人受到向前推的力 D.人具有惯性20、下列现象中,不能用惯性知识解释的是()A.司机开车时需要系安全带 B.运动员跳远时需要助跑C.骑自行车时为了减速捏紧车闸 D.投出的铅球离开手后继续向前运动21、小华静止站在水平地面上,下列说法中正确的是()A.他对地面的压力和他所受到的重力二力平衡B.他对地面的压力和地面对他的支持力二力平衡C.他受到的重力和地面对他的支持力是相互作用的力D.他对地面的压力和地面对他的支持力是相互作用的力22、如图所示,木块竖立在小车上,随小车一起以相同的速度向右做匀速直线运动,不考虑空气阻力,下列分析正确的是()A.小车的运动速度增大,则它的惯性也随之增大B.小车受到阻力突然停止运动时,那么木块将向左倾倒C.小车对木块的支持力与木块受到的重力是一对平衡力D.木块对小车的压力与小车对木块的支持力是一对平衡力23、物理课本放在水平桌面上,文具盒放在物理课本上,则()A.物理课本受到的重力和桌面对物理课本的支持力是一对平衡力B.物理课本对桌面的压力和桌面对物理课本的支持力是一对相互作用力C.物理课本对文具盒的支持力和文具盒对物理课本的压力是一对平衡力D.桌面对物理课本的支持力和文具盒对物理课本的压力是一对相互作用力24、如图所示是某同学玩排球的一个场景,下列说正确的是()A.击打排球时手感到疼,是因为物体间力的作用是相互的B.排球在空中飞行的过程中,运动状态不变C.排球在空中运动到最高点时不再受任何力D.排球在水平地面上静止时,所受重力和球对地面的压力是一对平衡力25、如图所示,一桌子静止在水平地面上,水平桌面上静止放一排球,下述的两个力是平衡力的是()A.桌子的重力和排球对桌面的压力B.排球的重力和地面对桌子的支持力C.桌子的重力和地面对桌子的支持力D.排球的重力和桌面对排球的支持力26、汽车在平直的公路上做匀速直线运动,下列彼此平衡的两个力是()A.汽车所受的重力和汽车对地面的压力 B.汽车所受的摩擦力和地面对汽车的支持力C.汽车所受的重力和汽车的牵引力 D.汽车所受的重力和地面对汽车的支持力27、如图所示,在测量摩擦力的实验中,用弹簧测力计拉一木块沿水平方向做匀速直线运动.下列选项中属于平衡力的是()A.木块受的重力与木块受的支持力B.地面受的摩擦力与木块受的摩擦力C.木块受的拉力与测力计受的拉力D.木块受的重力与木块地面对的压力28、磁悬浮列车行驶时依靠安装在列车底部的强磁铁将列车浮在轨道上方,从而可高速行驶,列车能高速行驶的原因是()A.减小了重力 B.减小了列车与铁轨之间的摩擦力C.依靠了列车的惯性 D.减小了列车所受的空气阻力29、如果你看过中央电视台体育频道的围棋讲座就会发现,棋子在竖直放置的棋盘上可以移动,但不会掉下来.原来,棋盘和棋子都是由磁性材料制成的.棋子不会掉落是因为()A.质量小,重力可以忽略不计 B.受到棋盘对它向上的摩擦力C.棋盘对它有很大的吸引力 D.它一方面受到棋盘的吸引,另一方面还受到空气的浮力30、用弹簧测力计拉着重8N的物体在水平面上以2.5m/s的速度做匀速直线运动,弹簧测力计的示数为2N.当绳子突然断开时,则()A.物体速度保持不变,受到的摩擦力小于2N B.物体速度逐渐减小,受到的摩擦力等于2NC.物体速度逐渐减小,受到的摩擦力等于8N D.物体立即停止,受到的摩擦力为零31、如图所示,水平传送带上的物体正在向右加速运动,分析物体受到的力有()A.重力、对传送带的压力B.重力、传送带的支持力、向左的摩擦力C.重力、传送带的支持力、向右的摩擦力D.重力、传送带的支持力、对传送带的压力32、将弹簧测力计右端固定,左端与木块相连,木块放在上表面水平的小车上,弹簧测力计保持水平,现拉动小车沿水平向左运动,稳定时弹簧测力计的示数如图所示.则木块所受摩擦力的方向与大小分别是()A.水平向右,3.4N B.水平向左,3.4NC.水平向左,2.6N D.水平向右,2.6N33、如图所示,木块置于小车上,在水平拉力F作用下,小车和木块一起以速度v沿水平地面向右做匀速直线运动(不计空气阻力).以下三组力属于平衡力的是①地面对小车的支持力与木块对小车的压力②小车对木块的摩擦力与木块受到的水平拉力③地面对小车的摩擦力与木块对小车的摩擦力A.仅①B ②①C.仅②D.①②③34、如图,一物体放在粗糙的水平地面上,在斜向上的拉力F的作用下向右做匀速直线运动。

2023年北京一模分类选编:化学与生活

2023年北京一模分类选编:化学与生活

.鸡蛋.米饭.苹果.西红柿2023·北京平谷·统考一模)为预防贫血,应给人体补充的元素是....颁奖礼服中的石墨烯发热材(填基本反应类型),其中化合价升高的元素五、计算题 24.(2023·北京石景山·统考一模)免洗手消毒凝胶是一种能快速灭活有害微生物的消毒剂。

某免洗手消毒凝胶配方主要成分含量为:乙醇(25C H OH )75%,水23%-24%,甘油()383C H O 1%。

(1)三种物质中,属于有机化合物的是__________。

(2)三种物质中,氢元素与氧元素的质量比为1:6的是_________。

六、简答题 25.(2023·北京海淀·统考一模)包饺子是常见的家庭活动。

晶晶家用面粉、牛肉、制萝卜等包饺子,请补齐食材与其富含营养素的连线。

七、科普阅读题 26.(2023·北京丰台·统考一模)阅读下面科普短文。

可可树的果实可可豆是制作巧克力的原料,直接食用苦涩味极重,让我们来了解一下它是如何蜕变成巧克力的。

发酵:将大量可可豆堆积在一起,持续一两周时间,果肉在微生物作用下开始发酵,内部温度不断升高。

在此过程中,种子失去了生物活性,发酵产生的酸与醇发生酯化反应,生成了带有果香味的物质。

晾晒:除去可可豆中多余的水分。

烘烤:可可豆内部的碳水化合物开始受热分解,类似于用锅加热蔗糖,碳水化合物逐渐焦糖化,颜色由白转棕。

在不同温度下,一定量蔗糖焦糖化程度变化如图1。

温度更高时,糖与蛋白质发生美拉德反应,形成大量具有香气的分子。

分离后混合:将烘烤后的可可豆进行压滤,分离出可可脂(熔点约35℃),同时得到压碎的可可粉。

将可可粉、可可脂、糖混合便得到了巧克力。

70%的黑巧克力就是将50%可可脂、20%可可粉、30%糖混合制成的(以质量分数记)。

某款巧克力的营养成分如图2。

巧克力味道令人愉悦,但能量密度极大,食用需适量。

目前,生态环保、功能多样的吸湿发热纤维的研发已成为纺织行业重要的发展方向。

年北京各区高考一模化学试题选择题分类汇编

年北京各区高考一模化学试题选择题分类汇编

2021年北京各区高考一模化学试题选择题分类汇编李金鑫整理一、化学与生活及分类法应用(西城区)6.以下说法不正确...的是A.二氧化硅可制玻璃、单质硅、光导纤维B.食盐、糖、醋可作调味剂,不可作食物防腐剂C.金属侵蚀的本质是金属原子失电子被氧化的进程D.大量服用阿司匹林会显现水杨酸中毒症,可静脉滴注NaHCO3溶液(海淀区)6.以下做法对改善大气质量无益..的是A.推行利用无铅汽油B.在农田中燃烧秸秆为土地施肥C.开发利用太阳能、氢能等新能源D.在汽车尾气系统中安装催化转化器(东城区)6. 以下说法正确的选项是A. 垃圾资源化的要紧途径是卫生填埋B. 在日常生活中,化学侵蚀是造成钢铁侵蚀的要紧缘故C. 推行利用新能源,能够减少二氧化碳等温室气体的排放D. 人造纤维、合成纤维和光导纤维都是有机高分子化合物(朝阳区)6. 以下与生产、生活相关的说法不正确...的是A.CO2和CH4都是温室气体B.酿酒进程中,淀粉水解不能取得乙醇C.天然气和液化石油气的要紧成份都是甲烷D.利用必然的催化剂可将汽车尾气中的CO和NO转化成CO2和N2(房山区)6.以下说法正确的选项是A.氮化硅、氧化铝均为高温结构材料B.汽油、乙烯均为石油分馏产品C.明矾、漂白粉均为自来水消毒剂D.光导纤维、涤纶均为合成高分子材料(大兴区)6.以下关于化学与生产、生活的熟悉说法正确的选项是A. CO 2、CH 4和N 2等都是造成温室效应的气体B. 氢氧化钠、碳酸氢钠、氢氧化铝都可用作抗酸药C. 利用清洁能源是避免酸雨发生的重要方法之一D. 为改善食物的色、香、味并避免变质,可在其中加入大量的食物添加剂(大兴区)7.以下物质、类别、用途或贮存方式对应关系正确的选项是A. Na 2CO 3B. CH 3COOHC. NH 3·H 2OD. Na 2SiO 3 碱弱电解质 混合物正盐烧碱工业 制食醋棕色瓶密封保存带玻璃塞的试剂瓶(门头沟区)6.以下有关生活和生产中的化学知识描述正确的选项是 A .合成纤维和光导纤维都是有机高分子化合物B .铝合金的大量利用归功于人们能利用焦炭等还原剂从氧化铝中取得铝C .发电厂的燃煤在燃烧时加入适量石灰石,有利于环境爱惜D .因为食盐能使细菌等蛋白质发生变性,因此用食盐腌制过的食物能较长时刻不变质 (门头沟区)8.自来水生产的流程示用意如下,以下说法错误..的是A .混凝剂除去悬浮物质的进程既有物理转变又有化学转变B .FeSO 4·7H 2O 是经常使用的混凝剂,它在水中最终生成Fe(OH)2沉淀C .假设要除去水中的Ca 2+、Mg 2+,可向水中加入石灰后再加入纯碱 D .用臭氧能够替代氯气进行消毒(丰台区)6.化学与环境爱惜紧密相关,以下表达正确的选项是A .绿色化学的核心是应用化学原理对环境污染进行治理B .处置废水时加入明矾作为消毒剂能够除去水中的杂质C .PM2.5(2.5微米以下的细颗粒物)要紧来自的燃烧D .某雨水样品搜集后放置一段时刻,pH 由4.68变成4.28,是因为水中溶解了较多水加入混凝剂 加氯 加沉淀剂细沙过滤供民用粗沙过滤的CO2(石景山区)6.以下说法不.正确的选项是A.赤潮、白色污染、绿色食物中的“赤”“白”“绿”均指相关物质的颜色B.能够用Si3N4、Al2O3制作高温结构陶瓷制品C.污水处置的方式有多种,经常使用的化学方式有:混凝法、中和法、沉淀法D是世界通用的循环再生标志,简称回收标志二、物质结构与元素周期律(东城区)7. a A n+、b B(n+1)+、c C n-、d D(n+1)-电子层结构相同。

【原创】北京市八区一模考试物理试题分类汇编(运动和力) 运动和力doc

【原创】北京市八区一模考试物理试题分类汇编(运动和力) 运动和力doc

北京市八区一模考试物理试题分类汇编运动和力部分四川省球溪高级中学 王城整理转载时,请勿删除掉作者信息!一、选择题(朝阳区)20.如图所示,质量相等的物块A 、B 叠放在光滑水平面上。

两轻质弹簧的一端固定在竖直墙壁上,另一端分别与A 、B 相连接。

两弹簧的原长相同,与A 相连的弹簧的劲度系数小于与B 相连的弹簧的劲度系数。

开始时A 、B 处于静止状态。

现对物块B 施加一水平向右的拉力,使A 、B 一起向右移动到某一位置又处于静止状态(A 、B 无相对滑动,弹簧处于弹性限度内),撤去这个拉力后( ) A .A 受到的合力总等于弹簧对B 的弹力 B .A 受到的合力总大于弹簧对B 的弹力C .A 受到的摩擦力始终与弹簧对它的弹力方向相同D .A 受到的摩擦力与弹簧对它的弹力方向有时相同,有时相反(崇文区)19.如图所示,一些商场安装了智能化的自动扶梯。

为了节约能源,在没有乘客乘行时,自动扶梯以较小的速度匀速运行,当有乘客乘行时自动扶梯经过先加速再匀速两个阶段运行。

则电梯在运送乘客的过程中( )A .乘客始终受摩擦力作用B .乘客经历先超重再失重C .乘客对扶梯的作用力先指向右下方,再竖直向下D .扶梯对乘客的作用力始终竖直向上(海淀区)20.如图8所示,在光滑的水平面上有一质量为M 、倾角为θ的光滑斜面体,它的斜面上有一质量为m 的物块沿斜面下滑。

关于物块下滑过程中对斜面压力大小的解答,有如下四个表达式。

要判断这四个表达式是否合理,你可以不必进行复杂的计算,而根据所学的物理知识和物理方法进行分析,从而判断解的合理性或正确性。

根据你的判断,下述表达式中可能正确的是A .θθ2sin sin m M Mmg - B .θθ2sin sin m M Mmg + C .θθ2sin cos m MMmg - (西城区)18.如图所示,倾角为θ的传送带沿逆时针方向以加速度a 加速转动时,小物体A 与传送带相对静止。

2023年北京市九年级物理中考一模试题分类选编:生活用电

2023年北京市九年级物理中考一模试题分类选编:生活用电

2023年北京市九年级物理中考一模试题分类选编:生活用电一、单选题1.(2023·北京门头沟·统考一模)下列说法中正确的是()A.只要注意用电安全,家庭电路无需安装保险丝或空气开关B.电能表是测量家庭电路中用电器总功率的仪表C.台灯与电视机均正常工作时是串联关系D.总开关突然跳闸(自动断开),是由于电路中总电流过大引起的2.(2023·北京·北京市陈经纶中学分校校考一模)关于家庭电路和安全用电,下列说法正确的是()A.电能表是测量消耗电能的仪表B.家庭电路中的电冰箱和空调是串联的C.用电器电线的绝缘皮破损了仍能继续使用D.导致家庭电路中电流过大的原因一定是短路3.(2023·北京海淀·统考一模)关于家庭电路和安全用电,下列说法正确的是()A.洗衣机工作时,其金属外壳需要接地B.电能表是测量家庭电路中用电器消耗电功率的仪表C.台灯、电视机、电冰箱接入家庭电路中正常工作时,它们之间是串联关系D.家庭电路中保险丝熔断,一定是由于同时工作的用电器总功率过大造成的4.(2023·北京顺义·统考一模)关于家庭电路和安全用电,下列说法中正确的是()A.我国家庭电路的电压是36VB.热水器的导线破损后继续使用C.在家庭电路中安装空气开关或保险丝D.工作中的用电器发生火灾时立即用水将火扑灭5.(2023·北京朝阳·统考一模)关于家庭电路和安全用电,下列说法正确的是()A.家庭电路中的各个用电器都是串联的B.使用试电笔辨别火线和零线时,手接触笔尾的金属体C.家用电器电线绝缘皮破损了仍可以继续使用D.低于220V的电压对人体来说都是安全的6.(2023·北京丰台·统考一模)关于家庭电路和安全用电,下列说法正确的是()A.在未断开电源的情况下更换灯泡B.在触电事故现场,要立即切断电源C.我国家庭电路的电压为36 VD.用潮湿的手拨动电器设备的开关7.(2023·北京平谷·统考一模)下列做法中,符合安全用电原则的是()A.用湿布擦墙上的插座B.清洗空调前应先断开电源开关C.把用电器的三角插头改成两脚插头插在两孔插座上使用D.辨别零线火线时,手指不能触碰试电笔上的任何金属体8.(2023·北京房山·统考一模)关于家庭电路和安全用电,下列说法中正确的是()A.电能表是测量电功率的仪表B.家庭电路中的电冰箱和洗衣机是串联的C.用电器电线的绝缘皮破损了不能继续使用D.导致家庭电路中电流过大的原因一定是实际功率过大二、多选题9.(2023·北京丰台·校联考一模)关于家庭电路和安全用电,下列说法正确的是()A.低于24V的电压,人体就可以接触B.使用验电笔时,请勿触碰验电笔后端的金属部分C.高压触电有电弧触电和跨步电压触电两种情形D.一般有金属外壳的电器用两孔插座三、填空题10.(2023·北京平谷·统考一模)如图所示,电能表的示数为________kW·h。

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2012城区一模单选分类练习时态题26. —Has Linda come back from Canada? 朝阳—Yes.She _____ there for eight years.A. has stayedB. staysC. stayedD. had stayed31. —I’m trying to find yesterday’s Beijing Morning Post. Have you seen it?石景山—I’m afraid that I it away. I thought you had finished reading it.A. threwB. had thrownC. throwD. has thrown22. Liu Fang is a company CEO now, but sheas a teacher in a middle school for three years. 石景山A. workedB. has workedC. worksD. had worked21. ---Did you happen to hear the recent news? 西城---Yes, Alice ______ the gold medal in the speech contest, which I find hard to believe.A. winsB.wonC. had wonD. will win27. —That’s a great sweater. I have never seen anything like it be fore. 东城— You think so? My grandmother ______ it for me.A. makesB. madeC. has madeD. had made25. I _____ toward the door to go outside when suddenly Jim opened it unexpectedly. 西城A. walkedB. was walkingC. had walkedD. hadbeen walking32. David ________ a customer when the fire started. 丰台A. servedB. was servingC. had servedD. wouldserve21. ---What happened to Bill? 海淀---He _____ really fast when suddenly he ran headfirst into a parked car.A. had runB. was runningC. has runD. has been running24. ---Do we have to wear our school uniforms tomorrow? 海淀---I think so. We _____ the coming-of-age ceremony in the afternoon.A. will be attendingB. have attendedC. attendD. attended28. —Bob is always complaining about not having any money. 西城-- The problem is that he doesn’t work hard and never ________.A. doesB. hadC. hasD. did31. ––Have you seen my e-mail about our TESLproject? 朝阳––Yes.Luckily I checked my e-mails yesterday. Normally I ______ my e-mailbox for days.A. haven’t openedB. didn’t openC. hadn’t openedD. don’t open32. Most of the telephone lines ______ in the hurricane last night, and so today it’s almost impossibleto get through to anybody. 西城A. destroyedB. had destroyedC. were destroyedD. had been destroyed32. Although the EiffelTower _____ to last for 20 years, it is still standing today. 海淀A. has designedB. had designedC. is designedD. wasdesigned34. Jane was elected chairman of the committee. This is the first time that a woman ______ to the post.朝阳A. has appointedB. had appointedC. has been appointedD. had been appointed24. — What are your rules for carry-on luggage, Madam? 东城— You ______ only one piece of luggage on the plane, Sir.A. allowB. allowedC. are allowedD. were allowed21. Since the end of the war, many of the priceless antiques ________ to their rightful owners. 丰台A. have returnedB. had returnedC. had been returnedD. have been returned25. My brother is tall with curly hair, wearing a pair of glasses. You ______ him very easily. 东城A. recognizedB. have recognizedC. will recognizeD. hadrecognized30. —Jack, do you know anything about Doctor Brown? 东城— I ______ to him for years. I don’t see how anyoneelse could do better.A. wentB.will goC. had goneD. have been going23. I’m sorry you ______ so long, but it’ll still be some time before Jim gets back.丰台A. waitB. waitedC. had waitedD. have been waiting26. —Guess what? I happened to meet Johnson in the street last Friday. 石景山—If my memory serves me correctly, you each other for ages.A. haven’t seenB. hadn’t seenC. didn’t seeD. don’t see27. When she entered the police station, she recognized the man who _____ her at once.丰台A. was attackingB. attackedC. had attackedD.would attack28. Jonny, I can’t believe how much you have changed! You _____ at least one foot! 海淀A. growB. grewC. have grownD. aregrowing23. — I thought you would join in my birthday party tomorrow. 石景山— I would if I to attend an important meeting.A. don’t haveB. didn’t haveC. will not haveD. would not have32. —I don’t think I want to live in the dormitory next year.东城—But check out the cost first. I wouldn’t be surp rised if you ______ your mind.A. changedB. will changeC. have changedD. would have changed30. We shouldn’t have come north for Christmas vacation. If we ______, we wouldn’t be stuck in the snow right now. 西城A. wasn’tB. didn’tC. hadn’tD. weren’t30. —Excuse me, visiting hours are over. It’s time for you to leave.丰台—I’m sorry, I didn’t know the time or I ________ earlier.A. will leaveB. would leaveC. had leftD. would have left23. Thank you so much! But for your text message, I _____ home without my ID card this morning.海淀A. would have leftB. wouldleaveC. had leftD. left28. —The wind is always blowing here.丰台—How I wish it ________ today.A. won’t blowB. didn’t blowC. doesn’t blowD. isn’t blowing非谓语26.Some seemingly harmless blogs might become harmful when _____ on the Internet by millions ofpeople. 海淀A. to readB. readingC. readD. being read25. With the victory at the French Open, Li Na has reached NO. 4 in the world,________ the previous Asian record. 丰台A. equaledB. equalingC. to have equaledD. having equaled25. The heavy snow lasted for a week, _____ a serious traffic confusion in the whole area. 朝阳A. causingB. causedC. having causedD. being caused32. Not with the quality of your goods, I will certainly not advise others to buy them. 石景山A. being impressedB. impressingC. impressedD. having impressed23. Many things such as going abroad and owning a car, _____ impossible in the past, are now verycommon. 西城A. being consideredB. to be consideredC. consideringD. considered28. ______ equal opportunities, both Frank and Billy may accomplish the task. 东城A. GivenB. GivingC. To giveD. To be given27. The tea house situated near platform 6 is now offering free cups of tea to those _____ for theXi’an train. 西城A. waitingB. waitC. to waitD. waited33. Programmes, ________ to bring the old and the young together, are growing inpopularity all over the world.A. designedB. to be designedC. designingD. having designed26. The question ______ at the next meeting will be a hard one. 东城A. to discussB. to be discussedC. discussingD. being discussed28. Prices climbed high in 2011, with the monthly CPI figure an 11-year-high of 6.9 percent inNovember. 石景山A. hitB. to hitC. to have hitD. hitting33. Many of the students who hope to enter the university will be disappointed because only one third______ for admission will be accepted. 东城A. applyB. to applyC. appliedD. applying29. The seats ______ for children and seniors are right at the front of the buses.朝阳A. reservedB. reservingC. to reserveD. having reserved33. Have you ever picked some beautiful vegetables for your dinner saladthat they are extremelybitter? 石景山A. foundB. findingC. to findD. find28. ______ valuable experience, he asked to be sent to remote areas. 朝阳A. To gainB. GainingC. GainedD. Being gained34. ______ the housing price, several measures have been adopted in the last two years. 海淀A. LoweringB. Having loweredC. To lowerD. To have lowered从句25. In English class, our teacher often creates an environment _____ we are given the opportunity tosolve problemsourselves. 海淀A. whenB. whichC. whereD. that30. There are many examples throughout the world ______ talented players are ignored by theirnational managers. 朝阳A. whenB. whereC. whichD. whose27. Huge amounts of oil have been found on the Gulf of Mexico floor, the effects of _____ haven’tdisappeared yet.石景山A. itB. thatC. whichD. whom35. Sam remembered several occasions in the past ______ he had experienced a similar feeling. 东城A.whatB. whichC. whereD. why24. Most people go to the theatre not to see a play _____ plot is complicated, but to listen to brilliantdialogues between actors. 西城A. whereB. whatC. whichD. whose26. Our usual walk is to or from the subway, ________ is how we get to work.丰台A. whichB. whereC. asD. that23. Several times Kelly heard her name called but when she turned around to see ______ it was, no one was in the room. 东城A. whoB. whereC. whyD. what26. ______ made things worse, he said, was that his roommate never took part in any of the cleaningwork. 西城A. WhatB. WhichC. ThatD. Who31. In order to assess ______ the treatment will fit your lifestyle, please take a moment to answer afew questions about yourself. 西城A. whatB. howC. whyD. where22. In college, you will discover ________ learning is about, from teacher-taught to self-learner. 丰台A. whichB. thatC. whatD. where33. He is quite strange, for everything he does is opposite to ___ is considered normal behavior. 朝阳A. whetherB. thatC. whatD. which29. Once in the forest, you ought to remain you are waiting for help. 石景山A. losing。

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