相关试题
【判断题】
一般强酸性阳离子交换树脂由Ｎａ型变成Ｈ型、强碱性阴离子交换树脂由Cl型变成OＨ型，其体积均增加５％
【判断题】
树脂的除硅工作交换容量越大，则出水残留HSiO3-含量越低
【判断题】
在中性溶液中阴树脂不能与酸根离子进行交换
【判断题】
在凝结水除盐系统中，阳树脂的氨化必须在阴阳树脂混合前进行
【判断题】
电厂水处理用的阴阳离子交换树脂是由苯乙烯和二乙烯苯聚合而成的高分子化合物
【判断题】
在相同直径下，逆流再生床比顺流再生床消耗再生剂要多
【判断题】
一级除盐系统中，除碳器设置在阳床之前最合理
【判断题】
离子交换树脂是一种不溶于水的高分子化合物
【判断题】
离子交换器内的交换剂层愈厚，交换器运行过程中的水头损失愈大，周期制水量愈少
【判断题】
逆流再生式阳床每次再生前都需要进行大反洗
【判断题】
普通混合床中，阴阳离子交换树脂体积比例一般为1：2
【判断题】
再生系统中酸雾吸收器是由于盐酸有挥发性而设置的，碱没有挥发性所以没设置类似设备
【判断题】
一级离子交换除盐系统的单元制是指将一个Ｈ型交换器，一个除碳器和一个ＯＨ型交换器串联在一起，组成一个独立的运行系统
【判断题】
逆流再生工艺是指运行时，水流向下流动，再生时再生液向上流动的对流水处理工艺
【判断题】
混合床可以看作是由许许多多阴、阳树脂交错排列而组成的多级式复床
【判断题】
在混凝处理中添加助凝剂可提高其混凝效果
【判断题】
逆流再生交换器运行的关键问题是使交换器内的交换剂不乱层
【判断题】
强酸性H型阳离子交换树脂失效后，体积增大
【判断题】
在离子交换再生过程中，再生液的流速一般控制在4～8m/h
【判断题】
酸度计长期使用时，要经常用标准缓冲溶液定位，才能保证仪器准确测量
【判断题】
为了防止造成阳离子交换树脂的损坏，要求进入水中余氯量小于0.1mg/L
【判断题】
逆流再生固定床再生时，当再生液进完后，应立即大流量冲洗
【判断题】
在循环水中加入液氯后，生成的次氯酸，可直接杀死水中微生物
【判断题】
溶解氧的测定在pH＝9.0的条件下进行
【判断题】
电导率的大小通常用来比较各物质的导电能力，因为我们通常测定的电导率是电阻的倒数
【判断题】
卸酸碱时，因为是气压或耐酸（碱）泵，可以不戴面罩和防护手套
【判断题】
膜电位就是玻璃电极内部与外部溶液之间产生的电位差
【判断题】
混凝处理用铝盐作混凝剂时，水的pH值太高或太低，对混凝效果都不会有影响
【判断题】
钠离子浓度计所用的PNa4定位液，其钠离子含量为23mg/L
【判断题】
在离子交换器再生水平一定的情况下，交换器内的交换层愈高，交换剂的工作容量愈大
【判断题】
对逆流再生离子交换器，进再生液时，必须严防空气带入，否则易引起乱层，降低交换剂的再生度
【判断题】
影响蒸汽品质的主要因素，是锅炉通过热力化学试验确定的运行指标，而与锅炉汽包内汽水分离装置和蒸汽清洗装置的效果无关
【判断题】
锅炉停炉后的联氨保护其主要目的是防止锅炉结垢
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【单选题】
Tom is a book lover. ______ likes reading very much.
A. He B. She C. You D. It
【单选题】
—May I listen to the music here, Mr. White?
—Sorry, you’d better it like that．
A. not to do B. not do to
C. dont do D. not do
【单选题】
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
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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
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5. I was looking for a birthday gift for my mother, but I couldnt find ______ suitable.
A. anything B. something C. nothing D. everything
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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
【单选题】
7. She ______ very hard since she came to our school.
A. studies B. has studied C. is studying D. studied
【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
【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
【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
【单选题】
11. How do you like the dishes, Eric?
— Fantastic! Nothing tastes ________.
A. nice B. better C. terrible D. worse
【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
【单选题】
13.You can save money _______ you buy cheaper things.
A. before B. unless C. if D. until
【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
【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
【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
【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
【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
【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
【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
【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
【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
【单选题】
23. It was dark, ______ I couldnt see what was happening.
A. or B. though C. but D. so
【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
【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
【单选题】
( ) 26. Where does the writer of "The little Prince" come from?
A．England． B．France． C．America． D．China．
【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
【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
【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．
【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．
【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．
【单选题】
( ) 32. What may be the proper Chinese for the underlined part in the passage？
A．闲暇时光 B．学费 C．精神空虚 D．经济不足
【单选题】
( ) 33. Why did Natalie Smith pay for the six cars behind her?
A. She had seven tickets.
B. She hoped to please others.
C. She knew the car drivers well.
D. She wanted to show kindness.
【单选题】
( ) 34. Judy Foreman copied down the phrase because she ___ .
A. thought it was beautifully written
B. wanted to know what it really meant
C. decided to write it on a warehouse wall
D. wanted her husband to put it up in the classroom
【单选题】
( ) 35. Who came up with the phrase according to the passage?
A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
【单选题】
( ) 36. What can we infer from the last paragraph?
A. People should practice random kindness to those in need.
B. People who receive kindness are likely to offer it to others.
C. People should practice random kindness to strangers they meet.
D. People who receive kindness are likely to pay it back to the giver.
【单选题】
( ) 37.The greatest river for navigation is ___________.
A. the Nile B. the Amazon C. the Mekong D. the Mississippi
【单选题】
( ) 38. From a dam, people can use the water for ___________.
A. keeping the rivers clean B. only making electricity
C. irrigation and making electricity D. washing clothes
【单选题】
( ) 39. The water in the river is polluted because of _____________.
A. people's drinking water too much B. people's swimming in the river too much
C. chemicals and other materials D. people's building a dam across a river
【单选题】
( ) 40. The best title of the passage is ___________.
A. Rivers in Cities B. The importance of Rivers
C. Transportation D. Natural Resources
