【单选题】
1.溶液的物质的量浓度是指( )。
(A) 1ml溶液中所含某物质的量；(B) 1g溶液申所含某物质的量；
(C) 1L溶液中所含某物质的量；(D) 1000g溶液中所含某物质的量。
A. 1mL溶液中所含某物质的量
B. 1g溶液中所含某物质的量
C. 1L溶液中所含某物质的量
D. 1000g溶液中所含某物质的量
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相关试题
【单选题】
3. Cu+2H2SO4(浓)=CuSO4+SO2↑+2H2O；3Cu+ 8HNO3(稀)= 3Cu(NO3)2+2NO↑+4H2O；根据以上两个反应，说明硫酸和硝酸具有( )
(A)和金属起置换反应的性质；(B)还原性；(C)强烈的氧化性；(D)剧烈的腐蚀性。
A. 和金属起置换反应的性质
B. 还原性
C. 强烈的氧化性
D. 剧烈的腐蚀性
【单选题】
6.NWT处理水化学工况是在高纯水中加人适量的氧或过氧化氢，在( ) 条件下，使钢材表面生成保护膜。
(A)碱性； (B)酸性； (C)弱酸性； (D) 中性。
A. 碱性
B. 酸性
C. 弱酸性
D. 中性
【单选题】
7.弱酸阳离子交换树脂由钠型转化为氢型时，其体积约增大（ ）%。
(A) 20； (B) 40； (C) 60； (D) 80。
A. 20
B. 40
C. 60
D. 80
【单选题】
9.为便于阴、阳树脂分层，混床用的阳树脂与阴树脂的湿真密度差应大于( )% 。
(A) 5-10； (B) 10-15； (C) 15-20； (D) 20-25。
A. 5-10
B. 10-15
C. 15-20
D. 20-25
【单选题】
10.为防止有机物对凝胶型强碱阴树脂的污染，要求进水耗氧量小于( ) mg/L。
(A) 0.5； (B) 1.0； (C) 1.5； (D) 2.0。
A. 0.5
B. 1.0
C. 1.5
D. 2.0
【单选题】
11.浮动床对树脂粒度一般要求在( ) mm。
(A) 0.35-1.25；(B) 0.6-1.2；(C) 0.4-0.8；(D) 0.8-1.25。
A. 0.35-1.25
B. 0.6-1.2
C. 0.4-0.8
D. 0.8-1.25
【单选题】
12.逆流再生固定床在再生过程中，为防止树脂乱层，从交换器顶部送入压缩空气，气压应维持在( ) MPa。
(A) 0-0.03；(B) 0.03-0.05；(C) 0.06-0.08；(D) > 0.08。
A. 0-0.03
B. 0.03-0.05
C. 0.06-0.08
D. ＞0.08
【单选题】
13.逆流再生离子交换器与顺流再生离子交换器，在结构上的主要区别是( )。
(A)有压脂层;(B) 有中间排液装置;(C)有压缩空气顶压;(D)有水顶压。
A. 有压脂层
B. 有中间排液装置
C. 有压缩空气顶压
D. 有水顶压
【单选题】
14.浮动床再生比耗一般为( )。
(A) 1.1-1.4；(B) 1.4-1.8；(C) 1.8-2.2；(D) 2.2-2.5。
A. 1.1-1.4
B. 1.4-1.8
C. 1.8-2.2
D. 2.2-2.5
【单选题】
17.经氢离子交换，25℃时，给水电导率达0.5uS/cm时，若( )h内没查明原因，给水水质继续恶化，则应停止机组运行。
(A) 12； (B) 24； (C) 36； (D) 48.
A. 12
B. 24
C. 36
D. 48
【单选题】
18.火力发电厂生产过程中，水主要起( )的作用。
(A)冷却； (B)冲洗； (C)冲洗和冷却； (D)传热和冷却。
A. 冷却
B. 冲洗
C. 冲洗和冷却
D. 传热和冷却
【单选题】
19.造成火力发电厂效率低的主要原因是( )。
(A)锅炉效率低； (B)汽轮机排汽热损失； (C)发电机损失；(D)汽轮机机械损失。
A. 锅炉效率低
B. 汽轮机排汽热损失
C. 发电机损失
D. 汽轮机机械损失
【单选题】
20.目前，火力发电厂排出的烟气中，造成大气污染的主要污染物是( )。
(A)二氧化硅；(B)氮氧化物；(C)重金属微粒；(D)二氧化硫
A. 二氧化硅
B. 氮氧化物
C. 重金属微粒
D. 二氧化硫
【单选题】
21.粉末状树脂比球状树脂反应速度快的原因是( )。(A)比球状树脂的纯度高；(B)其表面积远大于球状树脂；(C)比球状树脂的再生度高；(D)比球状树脂的交换容量高。
A. 比球状树脂的纯度高
B. 其表面积远大于球状树脂
C. 比球状树脂的再生度高
D. 比球状树脂的交换容量高
【单选题】
22.弱酸树脂固定床用硫酸再生时，再生溶液流速一般应控制在( )m/h。
(A) 5-7； (B) 7-10； (B) 10-15； (B) 15-20。
A. 5-7
B. 7-10
C. 10-15
D. 15-20
【单选题】
23.锅炉用氨一联氨法保护时，在氨一联氨溶液中，含联氨量为( )mg/L。
(A) 50； (B) 100； (C) 150； (D) 200。
A. 50
B. 100
C. 150
D. 200
【单选题】
24.容量在50MW以上的新建汽轮机组带负荷并网时，过热蒸汽的二氧化硅含量应小于( ) ug/kg。
(A) 50； (B) 100； (C) 150； (D) 200。
A. 50
B. 100
C. 150
D. 200
【单选题】
25.电厂给水采用联合处理(CWT)时，pH值应控制在( )。
(A) 6.5-7.5； (B) 7.0-8.0； (C) 8.3-8.6； (D) 8.6-9.3
A. 6.5-7.5
B. 7.0-8.0
C. 8.3-8.6
D. 8.6-9.3
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大型商场火灾扑救应坚持___的战术原则，优先利用建筑内部的消防设施实施火灾扑救。
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Tom is a book lover. ______ likes reading very much.
A. He B. She C. You D. It
A. A
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C. C
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—May I listen to the music here, Mr. White?
—Sorry, you’d better it like that．
A. not to do B. not do to
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3.—Did you have a good time at Lauras birthday party?
— Yes, indeed. Its several years ________ I enjoyed myself so much.
A. when B. before C. since D. that
A. A
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4. —___________ is the Summer Palace from here?
About three kilometers away. You can take the No. 35 bus.
A. How long B. How far C. How often D. How much
A. A
B. B
C. C
D. D
【单选题】
5. I was looking for a birthday gift for my mother, but I couldnt find ______ suitable.
A. anything B. something C. nothing D. everything
A. A
B. B
C. C
D. D
【单选题】
6. A friend of my ____ and I are going to visit_______ next week．
A. father; Browns B. father's; Browns
C. father; the Browns D. father's; the Browns
A. A
B. B
C. C
D. D
【单选题】
7. She ______ very hard since she came to our school.
A. studies B. has studied C. is studying D. studied
A. A
B. B
C. C
D. D
【单选题】
8. — Who will send you to the new school, your mom or your dad?
— _______. Ill go there by myself.
A. Both B. Either C. Neither D. None
A. A
B. B
C. C
D. D
【单选题】
9.—Well do what we can ____English well this term．
—It’s high time for you to work hard．
A. study B．to study C. be studied D. be studying
A. A
B. B
C. C
D. D
【单选题】
10. —I’m going to Flower Bookstore. Could you tell me ______?
— Sorry, I don’t know. I’m new here.
A. where it is B. where was it C. where is it D. where it was
A. A
B. B
C. C
D. D
【单选题】
11. How do you like the dishes, Eric?
— Fantastic! Nothing tastes ________.
A. nice B. better C. terrible D. worse
A. A
B. B
C. C
D. D
【单选题】
12. ______ Lin Feng has to work late, she always wears a smile on her face.
A. Because B. If C. Until D. Though
A. A
B. B
C. C
D. D
【单选题】
13.You can save money _______ you buy cheaper things.
A. before B. unless C. if D. until
A. A
B. B
C. C
D. D
【单选题】
14. We will have a _________ holiday after the exam．
A. two-month B. two month’s C. two month D. two-months
A. A
B. B
C. C
D. D
【单选题】
15. —We will build an underground in Xuzhou before 2015．
— Wow, _______! Will it pass our place?
A. what an excited news B. how excited the news is
C. what exciting news D. how exciting
A. A
B. B
C. C
D. D
【单选题】
16. — Emily, here’s a dictionary．I hope it will help you in some way．
— Thank you．It’s ________ what I need．
A. almost B. still C. only D. just
A. A
B. B
C. C
D. D
【单选题】
17. —Oh．I’m hungry．Mum, can I have the hamburger on the plate?
—No．It tastes ．
A. terribly B. terrible C. good D. well
A. A
B. B
C. C
D. D
【单选题】
18. —We can invite our teachers to the farewell party next Saturday.
—Yes, ______? I’ll call them at once.
A. what for B. what C. why not D. why
A. A
B. B
C. C
D. D
【单选题】
19.You can ________ ask the old man to move away to any other place because he has lived ________ here for at least sixty years．
A. hardly; alone B. hard; alone
C. hardly; lonely D. hardly; lonely
A. A
B. B
C. C
D. D
【单选题】
20.—I’m going back to see my grandparents this weekend．
—________．
A. It’s very nice of you B. You’d better hurry
C. Say goodbye to them D. Give my best wishes to them
A. A
B. B
C. C
D. D
【单选题】
21.—Why not take ____ umbrella with the sign “Made in China”? It is useful.
—What _______ good advice it is!
A. an; a B. a; a C. an; \ D. \; a
A. A
B. B
C. C
D. D
【单选题】
22. —Do you know the boy________ is sitting next to Peter?
— Yes. He is Peter’s friend. They are celebrating his ________ birthday.
A. who; ninth B. that; ninth C. /; ninth D. which; ninth
A. A
B. B
C. C
D. D
【单选题】
23. It was dark, ______ I couldnt see what was happening.
A. or B. though C. but D. so
A. A
B. B
C. C
D. D
【单选题】
24.—You can use MSN to talk with Vivien on the Internet.
—I know. But can you tell me ________?
A. what I can use it B. when I can use it
C. why can I use it D. how can I use it
A. A
B. B
C. C
D. D
【单选题】
25. _______ are you going to the School Uniform Exhibition, Amy ?
To learn about different styles of school uniform.
A. What B. Where C. Which D. Why
A. A
B. B
C. C
D. D
【单选题】
( ) 26. Where does the writer of "The little Prince" come from?
A．England． B．France． C．America． D．China．
A. A
B. B
C. C
D. D
【单选题】
( ) 27. What does the prince do after the fox tells him a secret?
A．He cares more about a flower and a sheep．
B．He meets many more strange adults on other planets．
C．He realizes his love for the rose and he goes back to his planet．
D．He discovers interesting things such as a snake, other roses and a fox
A. A
B. B
C. C
D. D
【单选题】
( ) 28. What does "The little Prince" mainly talk about? It' s about _________．
A．the adult world B．the planet B -612
C．a rose and a fox D．the adventure of a young prince
A. A
B. B
C. C
D. D
【单选题】
( ) 29. What is the writer's main purpose（目的）in writing this passage？
A．To tell the readers his life story．
B．To tell people what kind of person his father was．
C．To tell the readers what present he got from his father．
D． To let people know how poor he was．
A. A
B. B
C. C
D. D
【单选题】
( ) 30. Why did the father not ask his son not to do this and do that？
A．Because he felt quite confident of his son．
B．Because he was born from a poor family．
C．Because he was a man of few words．
D．Because he didn't want to be much too strict with his son．
A. A
B. B
C. C
D. D
【单选题】
( ) 31. What would someone learn from this passage？
A．How to live by oneself． B．How to stand on one's own feet．
C．What a good father should do． D．What the self-important is like．
A. A
B. B
C. C
D. D
