2018年中考英语语法专题练习全集(含答案)

2018年中考英语语法专题练习全集(含答案)
2018年中考英语语法专题练习全集(含答案)

《冠词》

1.掌握不定冠词a, an的用法;

2.掌握定冠词the的用法;

3.掌握含定冠词或不定冠词的习语和固定短语;

4.掌握零冠词的用法。

( )1. Jack is eight-year-old boy and he goes to school on foot every day.

A. an; the

B. a;/

C. an;/

D. a; the ( )2.一There is egg on the table. Would you like to have it?

一No, thanks.

A./

B. an

C. a

D. the

( )3.Donald Trump, 71-year-old businessman, was chosen President of the US last year.

A. a; a

B. a;/

C. the; a

D. the; the ( )4.Dangal (《摔跤吧!爸爸》), Indian movie, has become one of most popular movies in China.

A. a; /

B. a; the

C. an; the

D. /;the ( )5.Every evening my daughter plays piano for an hour.

A. the

B. a

C./

D. an

( )6.They stopped in beautiful place for camping, near farmhouse of the Smiths.

A. a; a

B. the; a

C. a; the

D. the; the ( )7.一This photo makes me think of trip to the Great Wall last year.

一Yeah, we had a great time there.

A. a

B. an

C. the

D./

( )8.I went to supermarket to buy birthday gift for my aunt yesterday.

A. an; a

B. a; a

C. the; /

D./; the ( )9.一Do you like movie Dangal?

一Yes. It's educational movie. I like it very much.

A. the; an

B. a; an

C. a; the

D. the; a ( )10. 一Who's boy under the tree?

一Bill. He's active boy.

A. a; an

B. a; the

C.the; a

D. the; an ( )11. Shenzhen is on coast near Hong Kong. It was small village many years ago.

A.a; the

B.the; a

C. /; /

D. the; the ( )12. Lang Lang is famous pianist. He plays piano very well.

A. a; the

B. the; the

C. the;/

D. a;/ ( )13. This is interesting story for the kids.

A.an

B. a

C./

( )14. I bought useful dictionary yesterday. dictionary is very

cheap.

A. a; A

B. a; The

C. an; The

( )15. 一Kate, are you only child in yourfamily?

一Yes, but new baby is on the way.

A. the; a

B. an; the

C. a; the

D. the: the ( )16.一In London, dogs and their owners can enjoy hour-long free bus tour.

一Wow! I hope we can also have such service in Dongying.

A. a

B. an

C. the

D./

( )17.一Do you know girl with long curly hair?

一Yes, she is Mary. She plays tennis very well.

A. a;/

B. the:/

C. the; the

D. a; the ( )18. There is tall man in front of the zoo gate.

A. a

B. an

C. the

D./

( )19. Jackie is such friendly boy. He gets along well with his classmates.

A. a

B. an

C. the

( )20.一When will car race begin?

I'm not sure. Maybe next week, or maybe week after next.

A. a; the

B. an; the

C. the; a

D. the; the ( )21.一Did you do well in English exam last week?

一Yes, I got “A”.

A. an; the

B.the; an

C. a;/

D. the; a ( )22. Last summer, my parents took me to the zoo. In the zoo we saw elephant.

elephant was from Africa.

A. a; The

B. the; An

C. an; The

D. the; A

( )23. I want to be police artist. It's interesting job.

A. a; the

B. a: an

C. an: the

D. the: the ( )24. Dear children, this is unusual exam. exam is very important to you.

A. an; The

B. a; The

C. an; An

( )25.They are having breakfast now. And hour later, they'll go shopping.

A. /; an

B. the; a

C. a; an

D. /; a

( )26.一Hey, Li Ming. Do you have basketball?

一Yes, it's over there, behind door.

A. a; a

B. the; the

C. a; the

D. the; a ( )27.一Do you know how to spell word “napkin(纸巾)” in English?

一Yes. It begins with “n”.

A the; a B. the; an C. a; an D. the; the ( )28.一Did you get up late this morning?

一Yes, so after quick breakfast, I had to run to office.

A. /

B. the

C. a

( )29. This afternoon my grandfather bought a magazine and a newspaper. The magazine is in his bag. But he can't remember where he put newspaper.

A. a

B. an

C. the

D./

( )30. Look! There is bottle on the table.

A. a

B. an

C. the

D./

( )31.一What do you think of the boy?

一He is honest student today and useful man tomorrow.

A. a; an

B. an; a

C. an; an

D. a; a ( )32. I usually have breakfast at home. I think it's good for my health.

A. a

B. an

C. the

D./

( )33.On Children's Day, Jack received a prize for being honest boy.

A the; an B. /; an C. /; a D. the; a ( )34. Those girls practiced playing football every day and they won the match at last.

A. a

B. /

C. the

( )35. I have useful book. It is about how to play basketball.

A an;/ B, a;/ C. an; the

( )36.一What time is it now, Mike?

一It's quarter past five. Let's go to play basketball.

A. /; /

B. a; a

C. the; a

D. a;/ ( )37.一Can I help you, Madam?

一I want interesting book as useful gift for my son

A. an; a

B. an; the

C. a; an

D. a; a ( )38.一Is Tony honest boy?

一Yes. I think he is most helpful boy in our class.

A. a; the

B. an; an

C. an; the

D. the: an ( )39.一What do you usually have for breakfast?

一Some bread, egg and a glass of

milk.

A. a

B. an

C. the

D. /

( )40.一Have you seen TV play called In the name of people?

一Yes, it's quite xcellent play!

A. a; the

B. the; an

C. /; an

参考答案

1-10 CBBCACCBAD 11-20 BAABABBAAD 21-30 BCBAACBCCA

31-40 BDBBBDACBB

《名词》

1.掌握可数名词和不可数名词;

2.掌握可数名词复数的规则变化和不规则变化;

3.掌握不可数名词量的表达方式;

4.掌握名词所有格的用法;

5.掌握名词用作定语的用法;

6.掌握专有名词的甩法。

名词辨析

( )1. 一How can Julie say bad words about me? I thought we were good friends.

一Who told you that? Friends need .

A. courage

B. distance

C. trust

D. shame

( )2. Dr. Ma has helped a lot of patients see again in the of his life.

A. form

B. way

C. direction

D. course

( )3. 一Dad, have you told Mom that I will come back next Wednesday?

一No. Let's keep it and give her a surprise.

A. chance

B. choice

C. secret

D. idea

( )4. 一I go swimming every day.

一Wow! That's a good . It keeps you healthy.

A. match

B. task

C. habit

D. dream

( )5. 一Shall we go on Friday or Saturday?

一Either day is OK. It makes no to me.

A. choice

B. change

C. difference

D. decision

( )6. 一Wow, an iPhone 7, what a big surprise! Thanks, darling!

一It's your birthday present. But please read the carefully before

you use it.

A. information

B. instructions

C. invitations

D. instruments

( )7. 一Could you give me a few on how to spend the coming summer holiday?

一OK. Let me see.

A. hobbies

B. knowledge

C. suggestions

D. information

( )8. My grandpa knows the history and medical of many plants.

A. wealth

B. price

C. value

D. cost

( )9. 一Did you do anything special on Father's Day?

一Yes. I made my father a card in the of a heart to express my love.

A. height

B. shape

C. design

D. model

( )10. Daniel has tried to lose by eating less recently, but two kilos has been put on instead.

A. weight

B. weights

C. height

D. heights

( )11. 一Zheng He was a Ming dynasty that we Chinese people are proud

of.

一I agree with you. He even succeeded sailing to the east coast of Africa.

A. tourist; to

B. philosopher: in

C. inventor; to

D. explorer; in

( )12. The Belt and Road Initiative(一带一路倡议)will help China improve the with those related countries, especially Pakistan(巴基斯坦).

A. relationship

B. agreement

C. environment

D. information

( )13. The New Silk Road will offer a good to more nations to communicate.

中考英语语法专项练习题及 答案

中考英语语法专项练习题及答案中考英语专项练习之主谓一致及直接引语和间接引语 主谓一致 英语中句子的主语要与其后的谓语保持一致,即“主谓一致”。一般遵循三个原则:语法一致原则、意义一致原则和就近一致原则。 【练习导航】 Ⅰ. 用适当的be动词或助动词填空。 1. Every student _______ got a book. 2. The number of students in the school _______ now rising. 3. A number of boys _______ playing basketball at the moment. 4. There _______ something else in the desk. 5. Tom, together with his mother, _______ gone to New York. 6. The teacher with two students _______ playing sports. 7. This pair of trousers _______ made by my aunt last year. 8. Five months _______ a long time to wait. 9. Here _______ some books. 10. To clean the room _______ your duty. Ⅱ. 用括号内所给动词的适当形式填空。 11. When I got there, they each _______ (read) a book. 12. Neither of us _______ (like) the storybook. 13. Everyone except me _______ (go) to the cinema yesterday. 14. A football team often _______ (have) eleven players. 15. No one but my parents _______ (know) the truth. 16. Jim’s family _______ (enjoy) watching TV after supper. 17. What you said _______ (be) quite useful to us. 18. Look! The class _______ (do) morning exercise on the playground. 19. Twenty years _______ (have) passed since he left his hometown. 20. Three glasses of milk _______ (be) enough for us. Ⅲ. 单项选择 ( )21. Either Tom or I ______ going there tomorrow. A. are B. is C. am D. be ( )22. Jenny as well as her friends ______ swimming. A. are going B. has gone C. were going D. have gone ( )23. No one ______ swimming in such bad weather. A. like B. likes C. liking D. liked ( )24. —What ______ the number of the students in your school? —About two thousand. A number of them ______ from the USA.

2018年中考物理专题训练《综合计算题》

题型复习(四)综合计算题 第1讲力学计算 题型之一压强和浮力的综合计算 1.(2017·威海 )夏鸥在研究某种物质的属性时发现该物体要浸没在煤油中保存.于是他将体积为1×10-3 m3、重为6 N的该物体用细线系在底面积为250 cm2的圆柱形容器的底部,并浸没在煤油中,如图所示.(煤油的密度为×103kg/m3,g取10 N/kg)求: (1)细线受到的拉力是多大 (2)若细线与物体脱落,待物体静止后煤油对容器底的压强变化了多少 2.(2017·咸宁)底面积为100 cm2的平底圆柱形容器内装有适量的水,放置于水平桌面上.现将体积为500 cm3、重为3 N的木块A轻放入容器内的水中,静止后水面的高度为8 cm,如图甲所示,若将一重为6 N的物体B用细绳系于A的下方,使其恰好浸没在水中,如图乙所示(水未溢出),不计绳重及其体积,ρ水=×103kg/m3,g取10 N/kg,求: (1)图甲中木块A静止时浸入水中的体积. (2)物体B的密度.甲乙 (3)图乙中水对容器底部的压强. 3.(2017·天水 ) 如图甲所示,不吸水的长方体物块放在底部水平的容器中,物块的质量为kg,物块的底面积为50 cm2,物块与容器底部用一根质量、体积均忽略不计的细绳相连,当往容器中缓慢

注水至如图乙所示位置,停止注水,此时,物块上表面距水面10 cm ,绳子竖直拉直,物块水平静止, 绳子的拉力为2 N .已知ρ水=×103 kg /m 3 ,g 取10 N /kg .求: (1)物块的重力. (2)物块的密度. 甲 乙 (3)注水过程中,绳子刚好竖直拉直时到图乙所示位置时,水对物块下表面压强的变化范围. 4.(2017·贵港)如图甲所示,放在水平桌面上的圆柱形容器的底面积为100 cm 2,装有20 cm 深的水,容器的质量为 kg ,厚度忽略不计.A 、B 是由密度不同的材料制成的两实心物块,已知B 物块 的体积是A 物块体积的1 8 .当把A 、B 两物块用细线相连放入水中时,两物块恰好悬浮,且没有水溢出, 如图乙所示,现剪断细线,A 物块上浮,稳定后水对容器底的压强变化了60 Pa ,物块A 有1 4 体积露出 水面.已知水的密度为×103 kg /m 3 ,g 取10 N /kg .求: (1)如图甲所示,容器对水平桌面的压强. (2)细线被剪断前后水面的高度差. 甲 乙 (3)A 、B 两物块的密度. 5.(2016·柳州)正方体塑料块A 的边长为L A = m ,它所受的重力G A =6 N ,另一圆柱体B 高h B = m ,底面积S B =5×10-3 m 2,它的密度ρB =×103 kg /m 3 .(已知水的密度为ρ水=×103 kg /m 3,g 取10 N /kg )求:

中考英语语法专题训练 名词(含答案)

中考语法专题训练(一) 名词 Ⅰ.单项选择 1.[2018·泰州] About how to achieve a balance between hobbies and schoolwork, Justin asked me for my . A.position B.attention C.suggestion D.introduction 2.[2018·宿迁] Wu Wei, a young artist, has received high from the art community for this sculptures. A.pride B.praise C.promise D.progress 3.[2018·盐城] Please give me some on how to spend the coming weekend. A.space B.advice C.praise D.courage 4.[2018·扬州] The Queqiao satellite(卫星) will form a bridge between controllers on Earth and the far side of the Moon. A.contribution https://www.360docs.net/doc/b34403562.html,munication C.celebration https://www.360docs.net/doc/b34403562.html,petition 5.[2018·常州]Lights are out. The concert is to begin. The fans hold their breath for Jay Chou’s. A.influence B.guidance C.experience D.appearance 6.[2018·南京]—Do you have this T-shirt in a small ? —I’m afraid not. It only comes in medium. A.size B.colour C.material D.taste 7.[2018·莱芜]Stephen Hawking’s story gives me much to face all kinds of difficulties. A.chance B.wealth C.courage D.decision 8.[2018·铜仁]—What would you like to drink? —I’d like three . A.bottles of waters B.bottle of waters C.bottle of water D.bottles of water 9.[2018·北部湾] The woman in a hat is aunt. A.Jack and John B.Jack’s and John C.Jack’s and John’s D.Jack and John’s 10.[2018·本溪]—Your is quite good. You must be from an English-speaking country. —Thanks, but I’m from China.

中考英语语法专题详解三

中考英语语法专题详解三 介词、连词 一. 介词 1. 介词概述:介词表示它与后面的名词或代词与其他句子成分的关系。介词是虚词,不能单独做句子成分。介词在英语中用法很活,也无一定规律可循。在初中范围内还应学一个记住一个,特别是那些和动词的特殊搭配。 2. 常用介词的意义和用法。 ⑴时间或地点介词in、on、at的用法区别: 表示时间时, in表示在一段时间里(在将来时句子中则表示在一段时间之后), on表示在具体的某一天或者某天的上下午等, at表示在某个时刻或者瞬间; 表示地点时, in表示在某个范围之内, on表示在某个平面上或与一个面相接触,at则表示在某个具体的场所或地点。如: He was born on the night of May 10th. I usually get up at 7:00 in the morning. His glasses are on the desk. My brother is at the bus stop. ⑵after与in表示时间的用法区别:“after+(具体时刻/从句)”表示“在…时刻之后”常用于一般过去时态;“in+(一段时间)”表示“在(多久)之后”,常用于将来时态。如:He said that he would come back after 6:00. My father is coming back from Astralia in about a month. ⑶since与for表示时间的用法区别:“since+(具体时刻/that-从句)”表示“自从…起一直到现在”,“for +(一段时间)”表示“持续一段时间”,都常用于完成时态;如:

2018年中考物理专题电学计算专题

专题十电学计算专题 类型一开关、变阻器引起的电路变化 1.如图所示,电源电压为9 V,并且保持不变,滑动变阻器的最大阻值为 20 Ω,小灯泡上标有“6 V 3 W”字样。求: (1)灯泡的电阻和正常工作时的电流是多少; (2)当S闭合,S1、S2都断开时,要使灯泡正常工作,滑动变阻器接入电路中的阻值为多大; (3)保持滑动变阻器的位置不变,闭合S、S1、S2,此时电流表示数为2 A,求R0的阻值是多少。

类型二电路安全前提下的取值围问题 2.如图所示,电源电压为6 V,小灯泡标有“4 V 1.6 W”的字样,定值电阻R=20 Ω,不考虑温度对灯丝电阻的影响,滑动变阻器上标有“0~20 Ω 1 A”字样。求: (1)小灯泡的电阻为多大。 (2)若只闭合S、S1时,要使电路消耗的功率最小,此时滑动变阻器的滑片应向哪端移动;此时电路消耗最小功率是多少瓦。 (3)若电流表的测量围为0~0.6 A,电压表的测量围为0~3 V,当只闭合S与S2时,在不损坏用电器的前提下,求滑动变阻器的取值围。

3.(2017·一模)如图所示的电路,电源电压保持不变,小灯泡L标有 “4 V 1.6 W”字样,滑动变阻器R1的最大阻值为20 Ω,定值电阻R2=20 Ω,电流表的量程为0~0.6 A,电压表的量程为0~3 V。求: (1)小灯泡正常工作时的电阻是多少。 (2)只闭合开关S、S2和S3,移动滑动变阻器R1的滑片P使电流表示数为0.5 A 时,R2消耗的电功率为1.25 W。此时滑动变阻器R1接入电路中的阻值是多少。 (3)只闭合开关S和S1,移动滑动变阻器R1的滑片P,小灯泡L的I-U图像如图乙所示,在保证各元件安全工作的情况下,滑动变阻器R1允许的取值围是多少。

2018年中考文言文阅读阅读专题训练

2018年中考文言文阅读专题训练 (一)阅读下面文言文,完成1—4题。(16分) (甲)山川之美,古来共谈。高峰入云,清流见底。两岸石壁,五色交辉。青林翠竹,四时俱备。晓雾将歇,猿鸟乱鸣;夕日欲颓,沉鳞竞跃。实是欲界之仙都。自康乐以来,未复有能与其奇者。(《答谢中书书》) (乙)子曰:“饭疏食,饮水,曲肱①而枕之,乐亦在其中矣。不义②而富且贵,于我如浮云。”(《论语》) 注:①肱:(gōng)胳膊。②义:遵守道义 1.下面加点词的意思相同 的一项是()。(3分) .. A.清流见.底见.往事耳 B.实是欲界之.仙都每假借于藏书之.家 C.于.我如浮云皆以美于.徐公 D.自.康乐以来自.非亭午夜分不见曦月 2.解释下面加点的词。(3分) ①古来共.谈共:②夕日欲颓.颓: ③未复有能与.其奇者与: 3.把下列句子翻译成现代汉语。(6分) ⑴晓雾将歇,猿鸟乱鸣。 ⑵曲肱而枕之,乐亦在其中矣。 4.请说说甲乙两文“乐”的情趣分别是什么?(4分)

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中考英语语法专项练习题

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2018年中考物理 光路图专题练习题

光路图 1.(l)图1中OA′是入射光线AO的折射光线,请在图中画出入射光线BO的折射光线OB′的大致位置. 【答案】如下图所示 2.作出下列图3中各图的入射光线或折射光线并标出折射角。 【答案】 3.如图所示,一束光从半球面上的A点沿半径方向射入半球形玻璃,已知半球形玻璃的球心为O,请画出这束光线在半球形玻璃左侧平面发生的折射、反射光路图. 【答案】如下图所示

4. 完成下列图7中各透镜的光路 【答案】 5.如图SA是由水底射灯射出的一条光线,请画出SA的折射光线和被平面镜反射处的光线. 【答案】如下图所示

6.如图所示,一块平面镜置于O处,恰能使光线AO被平面镜反射后照亮墙壁上的B点,请用作图的方法确定平面镜的位置。 【答案】 7.如图8所示,A′O′是AO在平面镜中的像,请画出平面镜的位置。 【答案】 8. 如图所示,一束光经凸透镜后射在平面镜上,请完成光路图. 【答案】

9.如图所示物体AB通过凸透镜所成正立、放大的像A′B′,请画出凸透镜的位置,并确定该 透镜焦点F. 【答案】如下图所示 10.根据题目的要求作图: (1)做出图中物体AB在平面镜中的像A’B’; (2)根据图中的两条光线找到光源的位置.并画光路图标出人的影子的长度.; 【答案】 11.如右图所示,一束光线从空气斜射到水面时发生反射和折射,OB为反射光线,请作出入射光线、法线和大致的折射光线(在图上标明三条光线的名称)

【答案】如图所示: 12.如图所示,一束水平光线从空气进入玻璃,在交界处同时发生反射和折射现象,在图上作出反射光线和折射光线. 【答案】如下图所示 13.如图,一束光从空气射到水面O点,反射光线在容器壁上形成一光点A。(1)画出反射光线及对应的入射光线;(2)大致画出该入射光线进入水的折射光线;(3)A在水中的像到A的距离为____________cm。 【答案】(1)如图所示;(2)如图所示;

2018年中考数学专题训练试卷及答案

2018年中考数学专题训练试卷及答案

目录 实数专题训练 (4) 实数专题训练答案 (8) 代数式、整式及因式分解专题训练 (9) 代数式、整式及因式分解专题训练答案 (12) 分式和二次根式专题训练 (13) 分式和二次根式专题训练答案 (16) 一次方程及方程组专题训练 (17) 一次方程及方程组专题训练答案 (21) 一元二次方程及分式方程专题训练 (22) 一元二次方程及分式方程专题训练答案 (26) 一元一次不等式及不等式组专题训练 (27) 一元一次不等式及不等式组专题训练答案 (30) 一次函数及反比例函数专题训练 (31) 一次函数及反比例函数专题训练答案 (35) 二次函数及其应用专题训练 (36) 二次函数及其应用专题训练答案 (40) 立体图形的认识及角、相交线与平行线专题训练 (41) 立体图形的认识及角、相交线与平行线专题训练答案 (45) 三角形专题训练 (46) 三角形专题训练答案 (50) 多边形及四边形专题训练 (51) 多边形及四边形专题训练答案 (54) 圆及尺规作图专题训练 (55)

圆及尺规作图专题训练答案 (59) 轴对称专题训练 (60) 轴对称专题训练答案 (64) 平移与旋转专题训练 (65) 平移与旋转专题训练答案 (70) 相似图形专题训练 (71) 相似图形专题训练答案 (75) 图形与坐标专题训练 (76) 图形与坐标专题训练答案 (81) 图形与证明专题训练 (82) 图形与证明专题训练答案 (85) 概率专题训练 (86) 概率专题训练答案 (90) 统计专题训练 (91) 统计专题训练答案 (95)

中考英语语法专项练习题及答案-

---------------------------------------------------------------最新资料推荐------------------------------------------------------ 2011届中考英语语法专项练习题及答案- 2011 届中考英语语法专项练习题及答案2010—2011 学年中考英语专项练习之主谓一致及直接引语和间接引语主谓一致英语中句子的主语要与其后的谓语保持一致,即“主谓一致” 。 一般遵循三个原则:语法一致原则、意义一致原则和就近一致原则。 【练习导航】Ⅰ. 用适当的 be 动词或助动词填空。 1. Every student _______ got a book. 2. The number of students in the school _______ now rising. 3. A number of boys _______ playing basketball at the moment. 4. There _______ something else in the desk. 5. Tom, together with his mother, _______ gone to New York. 6. The teacher with two students _______ playing sports. 7. This pair of trousers _______ made by my aunt last year. 8. Five months _______ a long time to wait. 9. Here _______ some books. 10. To clean the room _______ your duty. Ⅱ. 用括号内所给动词的适当形式填空。 11. When I got there, they each _______ (read) a book. 12. Neither of us _______ (like) the storybook. 13. Everyone except me _______ (go) to the cinema yesterday. 14. A football team often _______ (have) eleven players. 15. No one but my parents _______ (know) the truth. 16. Jim’s family _______ (enjoy) 1/ 98

2018中考物理试题分类汇编 专题1-12【12个专题汇总,含解析】

专题1 走进物理世界 一.选择题(共11小题) 1.(2018?钦州)下列数据中最接近初中物理课本宽度的是() A.1.6m B.7.5dm C.18cm D.70um 【分析】此题考查对生活中常见物体长度的估测,结合对生活的了解和对长度单位及其进率的认识,找出符合生活实际的答案。 【解答】解: 中学生伸开手掌,大拇指指尖到中指指尖的距离大约18cm,初中物理课本的宽度与此差不多,为18cm。 故选:C。 2.(2018?黄石)下列物理学家中,早在19世纪20年代,对电流跟电阻、电压之间的关系进行大量研究的科学家是() A.欧姆 B.法拉第C.伽利略D.焦尔 【分析】德国物理学家欧姆最先通过实验归纳出一段导体中电流跟电压和电阻之间的定量关系,即欧姆定律,并以他的名字命名电阻的单位。 【解答】解:德国物理学家欧姆最先通过实验归纳出一段导体中电流跟电压和电阻之间的定量关系,即欧姆定律; 故选:A。 3.(2018?杭州)测量是一个把待测的量与公认的标准进行比较的过程。下列实验过程中没有用到这一科学原理的是() A.用天平测出某物体的质量 B.用弹簧秤测出测出某物体的重力 C.用光学显微镜观察小鱼尾鳍内的血液流动 D.用 PH 试纸测出某溶液的 PH 【分析】在物理学中,要想进行比较就必须有一个共同的比较标准,故每个物理量都有各自的单位。

【解答】解: A、用天平可以测出某物体的质量,通过物体质量与砝码的比较得出测量值,故A正确; B、用弹簧秤测出测出某物体的重力,通过物体的重力与弹簧的伸长的比较得出测量值,故B正确; C、用光学显微镜观察小鱼尾鳍内的血液时,通过血液的位置变化得出结论,是观察法,故C错误; D、用 PH 试纸测出某溶液的PH值,通过对比得出测量值,故D正确。 故选:C。 4.(2018?攀枝花)下列估测中,最接近生活实际的是() A.一支新铅笔的长约为17cm B.攀枝花市夏季平均气温约为50℃ C.一瓶500mL的矿泉水质量为5kg D.复兴号高铁列车运行速度可达350m/s 【分析】不同物理量的估算,有的需要凭借生活经验,有的需要简单的计算,有的要进行单位的换算,最后判断最符合实际的是哪一个。 【解答】解:A、中学生伸开手掌,大拇指指尖到中指指尖的距离大约18cm,新铅笔的长度略小于此数值,在17cm左右。故A符合实际; B、攀枝花市夏季高温炎热,最高气温可能超过35℃,但平均气温要低于35℃.故B不符合实际; C、一瓶500mL=500cm3的矿泉水的质量在m=ρV=1.0g/cm3×500cm3=500g=0.5kg左右。故C 不符合实际; D、复兴号高铁运行速度可以达到350km/h。故D不符合实际。 故选:A。 5.(2018?济宁)PM2.5是指空气中直径很小的颗粒,“2.5”是表示颗粒直径的数值,其直径还不到人的头发丝粗细的二十分之一,下列选项中与PM2.5颗粒物大小相当正确的是() A.米粒 B.柳絮 C.细菌 D.原子 【分析】首先对PM2.5的直径作出估测,然后根据对常见物体尺度的了解作出选择。

2018年语文中考综合性学习训练题及答案

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