Book7Unit2 单元基础检测

Book7Unit2 单元基础检测
Book7Unit2 单元基础检测

Book Seven Unit Two Robots单元目标检测

I. 根据下列句子意思用所给词的准确形式或所给汉语填空(1X20=20’)

1. Everyone has a hope for success, but not everyone _____________ (desire)to get rich.

2. We were much ________________(alarm)by the fire in the forest.

3. Thunders ________________ (accompany)by heavy rain in this season are very common.

4. They only say such ____________(kind) things about you out of envy.

5. The teacher allowed us 5 minutes ______________(scan)the text through to get a general idea of the whole passage.

6. I felt much ___________________ (sympathize) for the blind; we cannot look down upon them.

7. She was having an ___________________(绯闻)with someone who has a wife

8. A boy is so naughty that his never ___________(遵守)the school rules.

9. Although she is _______________(年轻的)to me by 5 years, she has more working experience.

10. Last week he ______________(divorce)his wife—— their marriage lasted only 2 years.

11. Good benefits and a cash bonus should attract new _____________(graduate) to accept a job here.

12. Seven-years has traditionally been the time when love and_____________( affect)give way to disillusion and disappointment.

13. We have good reason to believe that you were involved in the theft of a car and would like you to _______________(accompany) us to the police station?

14. As I can see, your family are very much ________________(attach) to each other.

15. The design of this fashion designer is in simple and _____________ (优雅的)style.

16. The idea that number "13" brings bad luck seems to be quite ________________(荒谬).

17. They found that people in countries with higher incomes report higher life ___________(satisfy).

18. Please keep in mind that China is the first country to ___________ (宣布)that she will not be the first to use nuclear weapons.

19. His memory _____________ (celebrate) by Burns clubs across the world.

20. He ____________ (envy) her the position she has achieved in her profession.

II. 用所给词的词组适当形式填空(1X10=10’)

1. The moment he got up this morning, someone_______________(ring).

2.Tony would have to be rebuilt because you cannot have women _________________(fall) machines.

3. I suggested to him that the new machines _____________ _(test) before going into production.

4. You shouldn’t have ________________ (leave)in the mountains, it was very dangerous for her.

5. He heard a voice but when he___________________(turn), he saw nobody.

6. But for much of his working life, he has _______________ (set)his enthusiasm for physics to devote himself to a career in administration.

7. Some members of the House complain that their vote __________ (favour) the system could cost them their jobs in November.

8. You _______________(bound) be disappointed if you hope to go to college without hard work.

9. My thought on improving the financial condition of the company ______________ (similar) the boss’s.

10. As with anything, the more you practise, _____________(good) you become.

III.语法填空(2X10=20’)

Larry Belmont worked____1___________ a company that made robots. Recently it had begun___2____________ (experiment) with a household robot. It was going to be __3_____________

(test) out by Larry’s wife, Claire.

Claire didn’t want the robot in_____4___________ house, especially as her husband would be _5__________ (absence) for three weeks, __6___________ Larry persuaded her that the robot wouldn’t harm her or allow her to be harmed. It would be a bonus. _____7____________, when she first saw the robot, she felt _8___________(alarm). His name was Tony and he seemed_9___________ (much) like a human than a machine. He was tall and handsome with smooth hair and a deep voice although his __10_____________(face) expression never changed.

1.____________

2.____________

3.___________

4.___________

5.___________

6.____________

7.____________

8.___________

9.___________ 10___________

IV. 单句改错(2X10=20’)

1. In 1783 he started composing poetry on a traditional style using the dialect of Scots.

2. His fame was not accompanied by money and he found that necessary to return to farming.

3. His birthday is a unofficial "National Day" for Chinese.

4. The president was so young that he was junior than some of his employees.

5. I have been kept accompanied by the most considerate friends.

6. The woman divorced with her husband of 20 years.

7. I really would like to be leaving alone right now.

8. When the alarm clock sounded, she reached her gym bag and headed out of the door.

9. She felt embarrassing on hearing the news.

10. As the passing of time, she began to trust him.

V. 短文改错(2X10=20’)

College students have a little ways to pay their college fees. Many students have their parents

to pay the fees. Some students may apply to a bank loan and others will try to find part-time jobs

in and out of the campus. Apart from this, many good student can win a scholarship. By this way,

they can pay at least part of the fees. As to me, I will let my parents pay half of their fees because

they are rich enough. Beside my studies, I will take up a part-time job by teach some high-school

students math, physics, chemistry and English, as I'm very good at these subjects. Of course, I will

also work very hard at my lessons in order to I can easily win a scholarship.

VI. 完成句子(2X5=10’)

1. Kate believed that making a robot so much like a man __________________________ (bound)

凯特认为把机器人造的跟人似的肯定会惹麻烦。

2. Tim refused his father when he went to see the doctor. (accompany)

提姆拒绝由父亲陪同去看医生。

3.The moment________________________________, the whole school cheered. (declare)

一宣布运动会开幕, 全校师生欢呼雀跃。

4. Among his most famous works of science fiction, one __________________was the Foundation trilogy. (award)

在他那些最富盛名的科幻小说中,有本获奖的书叫做《基地三部曲》。

5. Claire _________________________ when Tony asked if she needed help with dressing. (feel)

当托尼问她是否需要帮忙穿衣时,克莱尔当时一定觉得很尴尬。

VII. 语法填空综合篇

Wood-block printing first appeared in the early Tang period. During the Song dynasty, the technique of block printing was very advanced. Books were 1 (beautiful) printed. Even today the books 2 (print) at the time are valuable and treasured by libraries and book collectors.

However, block printing 3 (be) not very convenient. Every two pages of a book had to be carved on a wood block, and a big book would require many blocks. Besides, there had to be large places for storing the books. 4 (overcome) these shortcomings, Bi Sheng invented the movable type during the years between 1041 and 1048.one word was carved on one piece of clay, 5 was hardened with fire. Then clay characters were set on 6 iron plate according to the text of a book. Then ink was applied to them and 7 (sheet) of paper spread over them, and the printing was done. Bi Sheng’s invention made printing faster and easier 8 before. Later, movable type of mental and wood was made and widely used.

The technique of printing was gradually known to other Asian countries and Europe. The great influence printing had 9 the advance of civilization is too clear to need any 10 (explain).

参考答案

Unit Two

I

1. desires

2. alarmed

3. accompanied

4. unkind

5. to scan

6sympathy 7. affair 8.obey 9. junior 10 divorced

11. graduates 12 affection 13 to accompany 14 attached 15 elegant

16. absurd 17.satisfaction 18. declare 19. is celebrated 20. envies

II

1. rang him up

2. fall(ing) in love with

3. (should) be tested out

4. left her alone

5. turned around

6.set aside

7.in favour of

8. are bound to 9. is similar 10.the better

III.

1. for / in

2. experimenting

3. tested

4. her/ their

5. absent

6.but

7. However

8. alarmed

9. more 10. facial

IV

1.on →in

2.that → it

3.a →an

4. than→to

5.kept

6.with

7.leaving→left

8.reached∧for

9 embarrassing→ embarrassed 10.as→with

V

College students have a little ways to pay their college fees. Many students have their parents

few

to pay the fees. Some students may apply to a bank loan and others will try to find part-time jobs in

for

and out of the campus. Apart from this, many good student can win a scholarship. By this way,

students In

they can pay at least part of the fees. As to me, I will let my parents pay half of their fees because

my

they are ∧rich enough. Beside my studies, I will take up a part-time job by teach some high-school not Besides teaching

students math, physics, chemistry and English, as I'm very good at these subjects. Of course, I will

also work very hard at my lessons in order to I can easily win a scholarship.

that

VI

1. was bound to cause trouble

2. to be accompanied by

3. the sports meet was declared open

4. for which he won an award

5. must have felt embarrassed

VII. 1. beautifully 2.printed 3.was 4.To overcome 5.which 6.an 7.sheets 8.than 9.on 10.explanation

第一单元基础知识检测

Unit1 I、单项选择 ( )1. -__________ can you play? -The drums. A. When B. How C. What D. Where ( )2. -__________ you sing? -Yes, I can. A. Do B. Can C. Are D. Am ( )3. I want to __________ the chess club. A. join B. join in C. join to D. join for ( )4. Tom wants ________ to you. Are you free? A.to tell B.tells C.to talk D.talks ( )5. Can you help me with _________? A. dance B. dancing C. dances D. to dance ( )6. -What club ______ you want to join? -Chess club. A. does B. do C. can D. are ( )7. Her sister can play __________ piano, but she can’t play _____ basketball. A. the; the B. /; the C. the; / D. /; / ( )8. My brother can play the guitar,______ he can’t play it very well. A. and B. so C. or D. but ( )9. -Are you good __________ your students? -Yes, I am. A. at B. with C. for D. of ( )10. -Are you __________? -Yes, I am. A. a musician B. musicians C. musician D. A and B ( )11. -Can he _________ a student? -Yes. A. is B. be C. are D. does ( )12. We want some singers(歌手) _________ our rock band. A. for B. of C. to D. at ( )13.Please call me ___________ 8989766. A.in B.at C.about D.with ( )14. Can you help me ____________ my English? A.with B.of C.learning D.about ( )15.What can you do, Lin Tao? ____________ . A.I like sports B.I want to join the music club C.I am well D.I can do Chinese Kung Fu ( )16.Hi, can I help you? ________.A.Yes, please B.No, I can’t C.Yes, I can D.You are welcome ( )17.Tom draws__________.His drawings are very _________. A.good, well B.well, good C.good, good D.well, well ( )18.Can he ___________ it in English? A.speak B.speaks C.say D.talk ( )19. -I can sing ,and I can _______ dance . A. also B. too C.either D. at ( )20. Bill can _________stories and the children want _________friends with me . A speak , make B tell , make C say, making D tell to make ( )21. My sister can _________ very well, so she wants to join __________ club. A. swim; swimming B. swims; swimming C. swim; swims D swims; swim ( )22. _________ does he want to join our club? A. What B. How C. Why D. Where ( )23. Victor sings well. He can _________ in our school music festival. A. is B. are C. be D. am ( )24. Our school show is _____ 6:00 pm _____ Sunday. A. at, on B. on, in C. in, at D. on, at ( )25. —Hello! __________? —Jeff. A. Can I help you B. How are you C. Can you spell your name D. May I know your name ( )26.He can swim very well, ______ he doesn’t want to join the club. A.and B. but C. / D. or ( )27.They need two _____ for their music club. A. musicians B. doctors C. runners D. swimmers ( )28.Sam is a __________ swimmer. He can swim very _________. A. well, good B. good, well C. good, good D. good, fine ( )29.Jeff’s sister can’t swim ___________ dance. A. and B. but C. and not D. or ( )30.-Can you swim or play chess? -_______. A. Yes,I am B.Yes, I can C. I can swim D.I don’t know

(完整)人教版高中化学选修4第四章《电化学基础》单元测试试题(含答案),推荐文档

人教版高中化学选修4 第四章《电化学基础》单元测试试题(含答案) 第四章《电化学基础》单元测试题 一、单选题(每小题只有一个正确答案) 1.利用反应 Zn+Cu2+= Zn2++ Cu 设计成原电池。则该电池的负极、正极和电解质溶 液选择合理的是() A.Zn、Cu、ZnSO4B.Cu、Zn、 ZnCl2 C.Cu、Zn、CuCl2D.Zn、Cu、CuSO4 2.控制适合的条件,将反应 2Fe3++2I- 2Fe2++I2设计成如下图所示的原电池。 下列判断不正确的是() A.为证明反应的发生,可取甲中溶液加入铁氰化钾溶液 B.反应开始时,甲中石墨电极上 Fe3+被还原,乙中石墨电极上发生氧化反应 C.电流计读数为零时,在甲中溶入FeCl2固体时,甲中的石墨电极为正极 D.此反应正反应方向若为放热,电流计读数为零时,降低温度后乙中石墨电极为负极 3.某同学组装了如图所示的电化学装置,电极Ⅰ为Zn,其他电极均为Cu,电解质溶 液都是CuSO4溶液,则下列说法正确的是() A.电子移动:电极Ⅰ→电极Ⅳ→电极Ⅲ→电极Ⅱ B.电极Ⅰ发生还原反应 C.电极Ⅳ逐渐溶解 D.电极Ⅲ的电极反应:Cu-2e-=Cu2+ 4.已知海水中含有的离子主要有 Na+、Mg2+、Cl-、Br-,利用下图装置进行实验探究,下列说法正确的是() A.X 为锌棒,K 置于 M,可减缓铁的腐蚀,铁电极上发生的反应为 2H++2e-=H2↑ 1 / 14

B.X 为锌棒,K 置于 M,外电路电流方向是从 X 到铁 C.X 为碳棒,K 置于 N,可减缓铁的腐蚀,利用的是外加电流的阴极保护法 D.X 为碳棒,K 置于 N,在 X 电极周围首先失电子的是 Cl- 5.下列解释事实的反应方程式不正确的是() A.热的纯碱溶液可去除油污:CO 3 2-+2H2 O H2 CO3 +2OH- B.钢铁发生吸氧腐蚀时,铁作负极被氧化:Fe-2e-=Fe2+ C.以Na2S 为沉淀剂,除去溶液中的Cu2+:Cu2++S2-= CuS↓ D.向电解饱和食盐水的两极溶液中滴加酚酞,阴极变红:2H2O+2e-==H2↑+2OH-6.化学与科学、技术、社会、环境密切相关。下列说法错误的是() A.锅炉水垢中含有的CaSO4,可先用Na2CO3溶液处理,后用盐酸除去B.废旧钢材焊接前,可依次用饱和 Na2CO3溶液、饱和 NH4Cl 溶液处理焊点处C.使用含有氯化钠的融雪剂会加快桥梁的腐蚀 D.为防止海鲜腐烂,可将海鲜产品浸泡在硫酸铜溶液中 7.研究人员发现了一种利用淡水与海水之间含盐量差别进行发电的“水”电池,总反应可表示为:5MnO2+2Ag+2NaCl=Na2Mn5O10+2AgCl。下列说法正确的是() A.正极反应式:Ag+Cl--e-=AgCl B.每生成1mol Na2Mn5O10转移的电子数为2N A C.Na+不断向“水”电池的负极移动D.AgCl 是还原产物 8.液体燃料电池相比于气体燃科电池具有体积小,无需气体存储装置等优点。一种以胼(N2H4)为燃料的电池装置如下图装置①,该电池用空气中的氧气作为氧化剂,KOH 作为电解质。下列有关叙述不正确的是() A.该燃料电池负极发生的电极反应为:N2H4+4OH--4e-═N2↑+4H2O B.用该燃料电池作为装置②的直流电源,产生 7.1gCl2至少需加入 0.5molN2H4 C.该燃料电池放电一段时间后,KOH 溶液的 pH 保持不变(KOH 溶液经充分搅拌且忽略反应过程中溶液体积的改变)

无损检测基础知识

一、无损检测基础知识 1.1无损检测概况 1.1.1无损检测的定义和分类 什么叫无损检测,从文字上面理解,无损检测就是指在不损坏试件的前提下,对试件进行检查和测试的方法。但是这并不是严格意义上的无损检测的定义,对现代无损检测的定义是:在不损坏试件的前提下,以物理或化学为手段,借助先进的技术和设备器材,对试件的内部及表面的结构、性质、状态进行检查和测试的方法。在无损检测技术发展过程中出现三个名称,即:无损探伤(Non-destructive lnspction),无损检测(Non-destructive Testing),无损评价( Non-destructive Evaluation)。一般认为,这三个名称体现了无损检测技术发展的三个阶段,其中无损探伤是早期阶段的名称,其内涵是探测和发现缺陷;无损检测是当前阶段的名称,其内涵不仅仅是探测缺陷,还包括探测试件的一些其它信息。而无损评价则是即将进入或正在进入的发展阶段,无损评价包涵更广泛,更深刻的内容,它不仅要求发现缺陷,探测试件的结构、性质、状态,还要求获取全面的、更准确的、综合的信息。 射线检测(Radiographyic Testing,,简称RT),超声波检测(Uitrasonic Testing,简称UT),磁粉检测(Magnetic Testing 简称MT),渗透检测(Penetrant Testing,简称PT)是开发较早,应用较广泛的探测缺陷的方法,称为四大常规检测方法,到目前为止,这四种方法仍是锅炉压力容器制造质量检验和再用检验最常用的无损检测方法,其中RT和UT 主要用于检测试件内部缺陷。PT主要用于检测试件表面缺陷,MT主要用于检测试件表面及近表面缺陷。其它用于锅炉压力容器的无损检测方法有涡流检测(Eddy current Testing,简称ET)、声发射检测(Acoustic Emission,简称AE)。 1.1.2无损检测的目的 用无损检测技术,通常是为了达到以下目的: 1、保证产品质量; 2、保障使用安全; 3、改进制造工艺; 4、降低生产成本。 1.1.3无损检测应用的特点 无损检测应用时,应掌握以下几个方面的特点: 1、无损检测要与破坏性检测配合; 2、正确选用实施无损检测的时机;

新版人教必修二Unit4 History and traditions单元过关检测(含答案)

UNIT 4单元过关检测卷 考试时间:120分钟满分:150分 选择题部分 第一部分听力(共两节,满分30分) 第一节(共5小题;每小题1.5分,满分7.5分) 听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 1.How much will the woman pay? A.$8. B.$10. C.$12. 2.What do the speakers see in the sky? A.A bird. B.A plane. C.A kite. 3.What is most probably the man's job? A.A taxi driver. B.A policeman. C.A restaurant waiter. 4.When will the earlier train leave? A.In a quarter. B.In thirty minutes. C.In an hour. 5.What does the man think of the novel? A.Boring. B.Just so-so. C.Moving. 第二节(共15小题;每小题1.5分,满分22.5分) 听下面5段对话或独白。每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项。听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。每段对话或独白读两遍。 听第6段材料,回答第6、7题。 6.Why does the woman come to Boston? A.To attend a meeting.

人教版三年级下册数学 第2单元过关检测卷

第2单元过关检测卷 一、认真读题,专心填写。(每空1分,共16分) 1.从324里连续减4,最多能减()次。 2.564÷4的商是()位数,商的最高位在()位上;368÷8的商是()位数,商的最高位在()位上。 3.÷=125……6,最小是(),此时是()。 4.83÷7,要使商的末尾有0,里应填()。 5.65÷7,要使商是三位数,里最小应填();要使商是两位数,里最大应填()。 6.一道除法算式中,商和余数都是4,除数正好是余数的2倍,被除数是()。 7.妈妈买了4件衬衣花了197元,平均每件衬衣大约()元。8.第一小组5名同学折了130朵花,第二小组4名同学折了140朵花,平均每名同学折了()朵花,平均每个小组折了()朵花。9.702÷7的商的末尾有()个0。 10.97÷3,要使商的中间有0,里应填()。 二、巧思妙断,判断对错。(每题1分,共5分) 1.被除数的末尾没有0,商的末尾也一定没有0。() 2.0乘任何数都得0,0除以任何数也都得0。() 3.鲜花店运来95枝玫瑰花,每8枝扎成一束,最多可以扎成11束。 () 4.一个数除以5,商是20,余数最大是6。()

5.除数是一位数的除法,如果被除数的第一位不够商1,就在第一位上写0。()三、反复比较,择优录取。(每题2分,共10分) 1.一个数的3倍是312,这个数是()。 A.144B.936C.14D.104 2.一个三位数除以5的商仍是一个三位数,那么被除数的最高位上的数不可能是()。 A.4B.5C.6D.7 3.55÷5,要使商的中间有0,里最小可以填()。 A.0B.1C.3D.4 4.下列算式的商最接近70的是()。 A.254÷5B.475÷6C.492÷7D.540÷8 5.分别用下面的数除以7,没有余数的是()。 A.539B.107C.214D.121 四、注意审题,细心计算。(31分) 1.直接写得数。(每题0.5分,共6分) 80÷4=280÷4=600÷6=64÷2= 0÷2=720÷9=63÷8≈181÷3≈ 418÷6≈558÷7≈347÷5≈238÷8≈ 2.列竖式计算,带※的要验算。(竖式2分,验算1分,共13分) 642÷4=※527÷5=234÷9= 840÷7=413÷5=327÷3=

Unit 18 单元基础检测

单元基础检测 Ⅰ.单词拼写 1.If anything happens to her,I’ll always have it on my conscience(良心). 2.We can deliver goods to your door free of charge. 3.Mr Smith used to watch tasteless(无味的) TV talk shows all day before he lost his sight. 4.The gift he gave me on my birthday is delicate(精美的) and I like it very much. 5.The poor old man wears shabby clothes. 6.Keep the camera steady(平稳的) while you take a picture. 7.It is a romantic love story between the young couple. 8.Through the window that night,I saw a vague(模糊的) figure climbing the tree. 9.She is unlike(不同于) the rest of her family. 10.He talks in a slow but humorous tone(语气). 11.Everything has its drawbacks(缺点). 12.It was too dark in this room,so the girl struck a match to light a candle. 13.I love the content and the theme(主题) of the site. 14.You can look for the book in the library catalogue(目录). 15.There was a beautiful rainbow in the sky after the heavy rain. Ⅱ.选词填空 Most supermarkets sell a range of organic products. 17.Nowadays,many old customs are gradually dying out. 18.They fell in love with each other at first sight. 19.Luckily for us,our efforts were not in vain. 20.He turned up an hour late for the meeting. 21.The public don’t have access to the site. 22.To be honest,I’m not satisfied with it. 23.Tom waved until the car was out of sight. 24.Turn around and let me look at your back. 25.Hang on a second! The head teacher has something to say. Ⅲ.单句语法填空 26.He is superior to his brother in mathematics.

选修四第四章电化学基础测试题

高二化学选修四《电化学基础》复习检测试题 可能用到的相对原子质量:H:1 C:12 N:14 O:16 Cu:64 Ag:108 第I卷(选择题共51分) 一、选择题(本题包括17小题,每题只有一个选项符合题意,每题3分共51分)1.下列金属防腐的措施中,属于牺牲阳极的阴极保护法的是( ) A.水中的钢闸门连接电源的负极 B.金属护拦表面涂漆 C.汽水底盘喷涂高分子膜 D.地下钢管连接锌板 2.下列叙述正确的是( ) A.电镀时,通常把待镀的金属制品作阳极 B.氯碱工业是电解熔融的NaCl,在阳极能得到Cl 2 C.氢氧燃料电池(酸性电解质)中O 2通入正极,电极反应为O 2 +4H++4e- ===2H 2 O D.下图中电子由Zn极流向Cu,盐桥中的Cl-移向CuSO 4 溶液 3.下列有关电化学的示意图中正确的是( ) 4.用铁丝、铜丝和CuSO 4 正确的是( ) A.构成原电池时Cu极反应为:Cu—2e =Cu2+ B.构成电解池时Cu极质量可能减少也可能增加 C.构成电解池时Fe极质量一定减少 D.构成的原电池或电解池工作后就可能产生大量气体 Fe Cu

5.如图,将纯Fe棒和石墨棒插入1 L饱和NaCl溶液中。下列说法正确的是A.M接负极,N接正极,当两极产生气体总量为22.4 L(标准状况) 时,生成1 mol NaOH B.M接负极,N接正极,在溶液中滴人酚酞试液,C电极周围溶液变红 C.M接负极,N接正极,若把烧杯中溶液换成1 L CuSO 4 溶液,反 应一段时间后,烧杯中产生蓝色沉淀 D.M接电源正极,N接电源负极,将C电极换成Cu电极,电解质溶 液换成CuSO 4 溶液,则可实现在铁上镀铜 6.为增强铝的耐腐蚀性,现以铅蓄电池为外电源,以Al作阳极、Pb作阴极,电解稀硫酸,铝表面的氧化膜增厚。其反应原理如下: 电池:Pb(s)+PbO 2(s)+2H 2 SO 4 (aq)=2PbSO 4 (s)+2H 2 O(l) 电解池:2Al+3H 2O Al 2 O 3 +3H 2 电池电解池 A H+移向Pb电极H+移向Pb电极 B 每消耗3molPb 生成2molAl 2O 3 C 正极:PbO 2+4H++2e=Pb2++2H 2 O 阳极:2Al+3H 2 O-6e=Al 2 O 3 +6H+ D 7 极b和d上没有气体逸出,但质量均增大,且增重b<d。 选项X Y A.MgSO 4CuSO 4 B.AgNO 3Pb(NO 3 ) 2 C.FeSO 4 Al 2 (SO 4 ) 3 D.CuSO 4AgNO 3 8 2O 7 2-)时,以铁板作阴、阳极,处理 过程中存在反应Cr 2O 7 2+6Fe2++14H+=2Cr3++6Fe3++7H 2 O,最后Cr3+以Cr(OH) 3 形式除 去,说法不正确 ...的是 A.阳极反应为Fe-2e-=Fe2+ B.电解过程中溶液pH不会变化 C.过程中有Fe(OH) 3沉淀生成 D.电路中每转移12mol电子,最多有 Fe C 饱和NaCl溶液 电源 M N

实验室检测基础知识

1、检验用水的要求 分析检验中绝大多数的分析是对水溶液的分析检测,因此水是最常用的溶剂。在实验室 中离不开蒸馏水或特殊用途的纯水,在未特殊注明的情况下,无论配制试剂用水,还是分析检验操作过程中加入的水,均为纯度能满足分析要求的蒸馏水或去离子水。蒸馏水可用普通 的生活用水经蒸馏汽化冷凝制成,也可以用阴阳离子交换处理的方法制得。特殊项目的检验 分析对水的纯度有特殊要求时,一般在检验方法中注明水的纯度要求和提纯处理的方法。 为保证纯水的质量能符合分析工作的要求,对于所制备的每一批纯水,都必须进行质量 检测。一般应达到以下标准: ①用电导仪测定的电导率小于或等于530卩s/cm(25C )。 ②酸度呈中性或弱酸性,PH=5.0~7.5(25C )?可用精密pH试纸、酸度计测定,也可用如 下指示剂法测定:在10 ml水中加入2~3滴1g/L甲基红指示剂,摇匀呈黄色不带红色,则说明水的酸度合格,呈中性;或在10 ml水中加入4~5滴1g/L溴百里酚蓝指示剂,摇匀不呈蓝色,则说明水的酸度合格,呈中性。 ③无有机物和微生物污染。检测方法为:在100 ml水中加入2滴0.1g/L高锰酸钾溶液 煮沸后仍为粉红色。 ④钙、镁等金属离子含量合格。检测方法为:在10 ml水样中加入2 ml氨-氯化铵缓冲 溶液(PH=10), 2滴5g/L铬黑T指示剂,摇匀。溶液呈蓝色表示水合格,如呈紫红色则表示 水不合格。 ⑤氢离子含量合格。检测方法为:在10 ml水样中加入数滴硝酸,再加入4滴10g/L 的AgNO3溶液,摇匀。溶液中无白色浑浊物表示水合格,如有白色浑浊物则表示水不合格。

2、检验用试剂的要求 ①标准试剂 标准试剂是用于衡量其他物质化学量的标准物质,通常由大型试剂厂生产,并严格按照国家标准进行检验,其特点是主体成分含量高而且准确可靠。 滴定分析用标准试剂,我国习惯称为基准试剂(PT),分为C级(第一基准)与D级(工作基 准)两个级别,主体成分体积分数分别为99.98~100.02%和99.95~100.05%, D级基准试剂是 滴定分析中的标准物质,基准试剂规定采用浅绿色标签。 ②普通试剂 普通试剂是实验室广泛使用的通用试剂,一般可分为三个级别,其规格和适用范围见下 表: 等级名称符号适用范围标志 一级优级纯GR精密分析、科研用,也可作基绿色 准物质 (保证试剂) 二级分析纯AR常用分析试剂、科研用试剂红色 三级 (分析试剂) 蓝色化学纯CR/CP要求较低的分析用试剂 普通试剂的规格和适用范围

人教版高中英语必修二Unit2单元检测题

Book2, Unit2 单元基础检测题 第一节:单词拼写(共15小题) 1.The players have to_______________ (竞争) against each other for winning the gold medal. 2. __________________(现今), more and more people enjoy travailing around. 3.The newspaper has lots of ____________________ (广告) , which help us to find a good job. 4. You can get even better deals if you are prepared to _________________(讨价还价). 5. The reporter tried to _________________(采访) more people to collect more information. 6. It is agreed that the Japanese leaders should take _________________(责任)for damaging relations between China and Japan. 7. Ever since the food safety accident, the government has carried out _____________ (定期的) checks on milk products to make sure that they are of high quality. 8. You will be ______________(罚款) if you don’t obey traffic rules. 9. It is rather___________________(绝望) to get a ticket during holidays. 10. If you do wrong, you _____________(应受) punishment. 11. Beijing h_____________ the 2008 Olympic Games successfully. 12. Ten of thousands of v____________________ worked for the Guangzhou Asian Games. 13.I am wondering who will r_______________ the boss when he is retired. 14. Do you know anyone with a mental or p________________illness? 15. You can get championship only if you beat the other c___________________. 第二节:完成句子(共13小题,30空) 1. They three fell asleep ___________ ___________ _______________(一个接一个地). 2. I will ___________________ _________ (与...竞争) other athletes in the competition. 3. What does the red color __________ ____________(代表,象征) in China?

新人教版五年级数学上册:第二单元过关检测卷2

第二单元过关检测卷 一、认真读题,专心填写。(每空1分,共20分) 1.用数对表示位置时,先表示(),再表示()。 2.李军买了一张电影票,座位是4排5号,用数对表示为(5,4),张红与李军买了同一场的电影票,她的座位号用数对表示为(7, 6),张红的座位是()排()号。 3.小军在教室的座位用数对(3,2)表示,那么他坐在第()列第()行,他左面相邻同学的位置用数对表示是(),他前面相邻同学的位置用数对表示是()。 4.如右图,苹果的位置为(2,3),则梨的位 置可以表示为(),西瓜的位置可以表 示为()。 5.一个点在图上的位置可用(5,7)表示,如果这个点向左平移3个单位,其位置应表示为(),向上平移2个单位,其位置应表示为()。 6.按指定的位置取字,拼成一副对联吧! 二、巧思妙断,判断对错。(每题2分,共10分) 1.数对(5,5)中两个5表示的意义相同。()

2.数对(2,3)和(3,2)表示同一个位置。() 3.在同一方格纸上,(x,4)与(y,4)两点在同一列上。() 4.小霞在教室的位置用数对表示是(3,4),她在教室的位置是第4行,第3列。() 5.一个数对只能确定一个位置。() 三、反复比较,择优录取。(每题2分,共10分) 1.如下左图,如果点X的位置表示为(2,3),则点Y的位置可以表示为()。 A.(4,4) B.(4,5) C.(5,4) D.(3,3) 2.如上右图,如果将三角形ABC向左平移2格得到三角形A′B′C′ ,则新图形中点A′(点A平移后对应的点)的位置用数对表示为()。 A.(5,1) B.(1,1) C.(7,1) D.(3,3) 3.音乐课上,聪聪坐在音乐教室的第4列第2行,用数对(4,2)表示,明明坐在聪聪正后方的第一个位置上,明明的位置用数对表示是()。 A.(5,2) B.(4,3) C.(3,2) D.(4,1)

先秦诸子选读第一单元基础测试

高二语文第三周小练考 一、基础知识选择题(每题3分,共24分) 1,下列各组词中加点字的注音全都正确的一项是:()A.曲肱(gōng) 有马十乘(shèng) 恶乎成名(wū) 自牖执其手(yǒu) ....B.孝弟(tì) 一箪食(dān) 便便言,唯谨尔(biàn) 木铎(yí) ....C.莞尔(wǎn) 臭恶,不食(xiù) 诲人不倦(huǐ) 能近取譬(bì) ....D.怃然(wǔ) 杀鸡为黍而食之(shí) 人焉廋哉(sōu) 喟然(kuì) ... .答案:A 解析: B项,铎(duó)C项,譬(pì) D项,食(sì) 2、下列各句中有语病的一句是() A.在春秋战国时代,许多政治家和士人都充斥急功近利的情绪,他们提出了许多政治策略和措施都是短视的。 B.孔子认为拯救道德人心才是解决社会问题的根本,他的主张被人们视为迂腐。 C.孔子在奔走于列国之间的年代里,曾多次受到暴力威胁,每次他都以坚定的信心克服了困难。 D.无论历史条件还是自身条件,孔子若实现改造社会的理想,其困难都比汤、武大得多。 答案:A 解析:“他们提出了许多政治策略和措施都是短视的”句式杂糅;应将“提出了”改为“提出的” 3.从词类活用的角度看,下列句中加点词的用法与例句不相同的一项是( ) 例句:耰而不辍.A.左右欲刃相如.C.范增数目项王

. B.子路从而后.D.侣鱼虾而友麋鹿. .答案:D 解析:例句与A、B、C三项中加点词语都是名词用作动词。耰:用耰松土并使土块细碎。刃:用刀杀。后:落在后面。目:用眼睛示意。D项,“侣”和“友”都是名词的意动用法,以……为侣,以……为友。 4、下列各组句子中的加点词意义和用法相同的一项是( ) A.①君子一言以为知②多见其不知量也..B.①人虽欲自绝②假舟楫者,非能水也,而绝江河..C.①偃之言是也②觉今是而昨非. .D.①莫春者,春服既成②后世之谬其传而莫能名者. .答案:C 解析:A项,①通“智”,聪明,智慧;②知道。B项,①动词,断绝;②渡过。C项,都是形容词,正确。D项,①同“暮”;②不定指代词,没有谁,没有人。 5、下列各句的文言句式与例句相同的一项是( ) 例句:博我以文,约我以礼 A.异乎三子者之撰 B.不吾知也 C.正唯弟子不能学也 D.贤哉,回也 答案:A 解析:例句与A项都是介宾短语后置(状语后置)。B项宾语前置,C项判断句,D项主谓倒装。 6、下列句中不含通假字的一项是( ) A.尧舜其犹病诸 B.问知C.举直错诸枉 D.乡也吾见于夫子而问知

高二化学《电化学基础》单元测试题

高二化学《电化学基础》单元测试题 注意:可能用到的相对原子质量: H C N O Cl Fe Cu Zn Ag 1 1 2 14 16 35.5 56 64 65 108 【测试题目】 第I卷(选择题,共48分) 一、选择题(本题包括12个小题,每小题4分,每题只有一个选项符合题意) 1、下列关于实验现象的描述不正确的是 A、把铜片和铁片紧靠在一起浸入稀硫酸中,铜片表面出现气泡 B、用锌片做阳极,铁片做阴极,电解氯化锌溶液,铁片表面出现一层锌 C、把铜片插入三氯化铁溶液中,在铜片表面出现一层铁 D、把锌粒放入盛有盐酸的试管中,加入几滴氯化铜溶液,产生气泡速率加快 2、钢铁发生电化学腐蚀时,负极发生的反应是 A、2H++2e-=H2 B、2H2O+O2+4e-=4OH— C、Fe-2e-=Fe2+ D、4OH—-4e-=2H2O+O2 3、用惰性电极电解下列溶液时,阴极和阳极上的主要产物分别是H2和O2的是 A、稀NaOH溶液 B、HCl溶液 C、酸性CuSO4溶液 D、酸性AgNO3溶液 4、在原电池和电解池的电极上所发生的反应,同属氧化反应的是 A、原电池的正极和电解池的阳极所发生的反应 B、原电池的正极和电解池的阴极所发生的反应 C、原电池的负极和电解池的阳极所发生的反应 D、原电池的负极和电解池的阴极所发生的反应 5、随着人们生活质量不断提高,废电池必须进行集中处理的问题提到议事日程,其主要原因是 A、利用电池外壳的金属材料 B、防止电池中汞、镉和铅等重金属离子对土壤和水源的污染 C、不使电池中渗泄的电解液腐蚀其他物品 D、回收其中石墨电极 6、如右图所示,关于此装置的叙述,正确的是 A、铜是阳极,铜片上有气泡产生 B、铜片质量逐渐减少 C、电流从锌片经导线流向铜片 D、氢离子在铜片表面被还原 7、以下现象与电化腐蚀无关的是 A、黄铜(铜锌合金)制作的铜锣不易产生铜绿 B、生铁比软铁芯(几乎是纯铁)容易生锈

水质检测基础知识

水质检测基础知识 第一章:水分析岗位知识 一.仪器设备知识 1.电导电极有哪几种? 答:有光亮和铂黑两种 2.DJS-1型光亮电导极运用范围? 答:被测溶液的电导率低于10μs/cm时使用 3.电导仪"低周"的适用范围 答:测量电导率低于300μs/cm的液体时使用 4.测PH值用的玻璃电极为什么要用蒸馏水浸泡后才能使用? 答:因为干玻璃电极不显示PH效应,只有经过水化的玻璃电极才显示PH效应,所以玻璃电极要浸泡在蒸馏水中备用. 5.玻璃电极使用前为什么要处理? 答:玻璃电极经浸泡24小时以上,玻璃电极形成了稳定的水化层,使玻璃电极的膜电位在一定温度下与试液的PH值成线性关系,因此玻璃电极在使用前应在蒸馏水或0.1N盐酸中浸泡24小时以上. 6.电子天平的称量原理? 答:电子天平的称量依据是电磁力平衡原理. 7.PHS-3C型酸度计工作原理? 答:是利用PH电极和参比电极对被测溶液中不同酸度产生的 直流电位,通过放大器输送到转换器,以达到显示PH的目的. 8.721型分光光度计的使用范围是什么? 答:721型分光光度计可用于实验室中可见光谱360~800nm范崐围内进行定量比色分析.

9.使用分光光度计的注意事项? 答:连续使用时间不宜过长,要正确拿比色皿,拿毛玻璃面,洗 涤并保管好比色皿,不要用去污粉或毛刷刷洗. 10.721分光光度计对工作环境有什么要求? 答:?应安放在干燥房间内,放置在坚固平稳的工作台上使用,崐应远离高强磁场.?电场及高频波的电气设备.避免在有硫化氢.亚崐硫酸氟等腐蚀性气体的场所使用. 11.721分光光度计工作原理是什么? 答:721分光光度计是根据朗伯-比耳定律设计的A=KCL.?当入崐射光.?吸收系数K.溶液的光径长度L不变时,透射光是根据浓度而崐变化的. 12.721分光光度计由哪几部分组成? 答:由光源.单色器.比色皿和检测器四部分构成. 13.电子天平应安放在什么环境下? 答1)稳定,尽可能避免震动 (2)保证无大的温度变化,无腐蚀 (3)避免阳光直射和通风 (4)电源要稳定 二.专业技术知识 14.碱性碘化钾溶液应(避光)保存,防止(碘逸出) 15.碘量法测定溶解氧的原理是溶解氧与硫酸锰和(氢氧化钠)崐结合,?生成二价或四价锰的(氢氧化物)棕色沉淀.加酸后,沉淀溶崐解,并与(碘离子)发生氧化--还原反应.释出与溶解氧等量的(碘)崐再用淀粉为指示剂,用硫化硫酸钠滴定碘,计算出溶解氧含量. 16.悬浮物是衡量废水质量的指示之一,它可使水质(混浊)降崐低水质(透光度),影响水生物的(呼吸)(代谢)的作用. 17.在测CODcr时,检查试剂的质量或操作技术时用(邻苯二甲崐酸氢钾)标液.

人教版高中物理必修二单元过关检测卷(九)

高中物理学习材料 (灿若寒星**整理制作) 百校联盟高一新课程物理单元过关检测卷(九) 编审:百校联盟考试研究中心 审校:长沙市长郡中学麓山国际实验学校 第九单元重力势能探究弹性势能的表达式 实验:探究功与速度变化的关系动能和动能定理 (90分钟 100分) 一、选择题:本题共10小题,每小题4分,共40分,在每小题给出的四个选项中。至少有一个是正确的,每小题全部选对的得4分,选对但不全的得2分,不选和有选错的均得零分。 1.关于物体的重力势能,下面说法中正确的是() A.地面上物体的重力势能一定为零 B.质量大的物体的重力势能一定大 C.离地面高的物体的重力势能一定大 D.离地面有一定高度的物体的重力势能可能为零 2.关于物体重力势能的变化,下列说法中正确的是() A.物体的位置发生了改变,它的重力势能一定会发生变化 B.物体的重力势能发生了变化,它的位置一定发生了改变 C.只要有力对物体做了功,物体的重力势能一定发生变化 D.只有重力对物体做了功,物体的重力势能才会发生变化 3.对做变速运动的物体,下列说法中正确的是() A.合外力一定对物体做功 B.合外力可能对物体做功 C.物体所受的合外力一定不为零 D.物体所受的合外力可能为零 4.A、B两物体在光滑的水平面上,分别在相同的水平恒力F作用下,由静止开始通过相同的位移s.若A的质量大于B的质量,则在这一过程中() A.A获得的动能较大 B.B获得的动能较大

C.A 、B 获得的动能一样大 D.无法比较A 、B 获得的动能大小 5.下列关于运动物体所受合外力做功与动能变化的关系,正确的是( ) A.如果物体所受合外力为零,则合外力对物体做的功一定为零 B.如果合外力对物体所做的功为零,则合外力一定为零 C.物体在合外力作用下做变速运动,动能一定发生变化 D.物体的动能不变,所受合外力一定为零 6.若两个物体的质量之比为1∶4,速度的大小之比为4∶1,则这两个物体的动能之比为 ( ) A.1∶1 B.1∶4 C.4∶1 D.2∶1 7.一人用力踢质量为1 kg 的足球,使球由静止以10 m/s 的速度沿水平方向飞出.假设人踢球时对球的平均作用力为200 N ,球在水平方向运动了20 m ,那么人对球所做的功为( ) A.50 J B.100 J C.200 J D.4000 J 8.甲、乙两个物体距地面的高度分别为h 1和h 2(h 1>h 2),它们对地面的重力势能分别为1P E 和2P E ,则( ) A.1P E >2P E B.E =1P E C.1P E <2P E D.无法确定 9.如图所示,质量为m 的物体静止在地面上,物体上面连一轻弹簧. 用手拉着弹簧上端将 物体缓慢提高h ,若不计物体动能的改变和弹簧的重力,则人做的功( ) A.等于mgh B.大于mgh C.小于mgh D.无法确定 10.如图所示,小球在竖直向下的力F 作用下将竖直弹簧压缩,若将力F 撤去,小球将向上弹起并离开弹簧,直到小球速度为零. 在小球上升的过程中,下列说法正确的是( ) A.小球的动能先增大后减小 B.小球在离开弹簧时动能最大 C.小球的重力势能一直在增大 D.小球的动能最大时弹簧的弹性势能为零 题号 1 2 3 4 5 6 7 8 9 10 答案 二、填空题:本题共3小题,每题4分,满分12分;将正确、完整的答案填入相应的横线

二年级数学:第二单元过关检测卷 (含答案)

二年级数学:第二单元过关检测卷(含答案) 第二单元教材过关卷 一、填一填。(每空1分,共9分) 1.把18支铅笔平均分成6份,每份有( )支。 2.24÷4=6,运用的口诀是( )。 3.30里面有( )个5,( )里面有4个3。 4.用二六十二这句口诀计算的除法算式有( )和( )。5.15个,每 3个一份,可以分成( )份。 6.20个,平均分成5份,每份( )个。 7.从18里连续减( )个6,结果是0。 二、判断。(对的画“√”,错的画“×”)(每题1分,共5分) 1.8÷2=4,读作8除2等于4。( ) 2.计算10÷2=5和10÷5=2都用二五一十这句口诀。 ( ) 3.把8个苹果分给明明和芳芳,每人分4个苹果。( ) 4.14÷2=7,14是除数,2是被除数,7是商。( ) 5.商一定比被除数小。( ) 三、选一选。(每题2分,共10分) 1.下面的分法中,是平均分的是( )。 A B C 2.被除数是6,除数是3,商是( )。 A.18 B.2 C.3

3.下面算式中,商不是1的是( )。 A.8÷8B.12÷4C.1÷1 4.20里面有4个( )。 A.5 B.4 C.16 5.用五五二十五这句口诀能写( )道除法算式。 A.2 B.1 C.3 四、看图列式计算。(3题4分,4题6分,其余每题2分,共14分) 1. 2. 3. 4.

五、我会算。(18分) 18÷3=6÷6=20÷5= 4×2=30÷6= 16-7= 8÷4= 62-40=2×5= 20+3=30÷6=25÷5= 18÷6=7×2=15÷3= 15+6=3÷3=12÷4= 六、在里填上适当的运算符号。(6分) 44=16 42=6 93=3 153=5 255=30 105=5 七、列式计算。(每题3分,共12分) 1.被除数是14,除数是7,商是多少?2.把20平均分成5份,每份是多少?

相关文档
最新文档