【多选题】
（多选）截止2019年8月31日，我校以下哪些学科进入了ESI前1%？___
A. 化学
B. 工程学
C. 农学
D. 管理学
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相关试题
【判断题】
0.10mol/L二乙胺溶液，其溶液的碱度应用公式。
【判断题】
一元强酸弱碱盐溶液酸度的计算公式是 。
【判断题】
多元弱酸溶液pH值得计算一般按一元弱酸溶液处理 。
【判断题】
多元弱碱溶液pH值得计算一般按一元弱碱溶液处理。
【判断题】
当某二元弱酸酸式盐NaHA的浓度为0.1mol/L时其溶液的pH值为8.31，已知HA的Ka1=4.2×10-7，Ka2=5.6×10-11。
【判断题】
含有0.02mol/L的Bi3+和0.002mol/L的Pb2+的混合溶液，以0.0200mol/L的EDTA标准滴定溶液滴定其中的Bi3+,若终点时HNO3的浓度为0.10mol/L时，则Bi3+与EDTA络合物的条件稳定常数K’BiY为109.9（已知 ， ；pH=1.0， ）。
【判断题】
0.20mol/L的NH4SCN和2.0×10-4mol/L的ZnCl2溶液等体积混合，已知混合后游离Zn2+的浓度为2.0×10-5mol/L。若只形成ZnSCN+络合物，则形成该络合物的常数K=40。
【判断题】
二氧化碳在实际应用中作超临界流体的萃取剂是最多的。
【判断题】
浊点现象是非离子表面活性剂水溶液加热超过某一浊度时溶液出现浑浊和相分离现象。
【判断题】
浊点现象是非离子表面活性剂水溶液加热超过某一浊度时溶液出现浑浊现象。
【判断题】
当非离子表面活性剂水溶液加热出现浊点现象时的温度称为浊点温度。
【判断题】
表面活性剂中亲水链长增加，则浊点温度下降。
【判断题】
表面活性剂中疏水链长增加，则浊点温度下降。
【判断题】
利用浊点现象使样品中疏水性和亲水性物质分离的萃取方法称为浊点温度。
【判断题】
浊点萃取只能起到分离作用，不能起到富集作用。
【判断题】
浊点萃取时，浊点温度与表面活性剂中亲水和疏水链长有关，疏水部分相同，亲水链长增加，浊点升高；相反疏水链长增加，则浊点下降。
【判断题】
在浊点萃取中，溶液的pＨ值对离子型表面活性剂体系影响十分显著。
【判断题】
紫外-可见分光光度计中单色器的作用是使复合光色散为单色光，而原子吸收光谱仪中的单色器的作用在于分离谱线。
【判断题】
雾化器喷嘴为铂铱合金毛细管，为防止被腐蚀，每次使用后要用去离子水冲洗，若发现堵塞，应及时疏通。
【判断题】
电位滴定终点确定方法中，△E/△V-V曲线法又称一阶微商法。
【判断题】
库仑分析法分两类：恒电位库仑分析和恒电流库仑分析。
【判断题】
电位滴定法测定水中氯离子含量时，以硝酸银为标准滴定溶液，可选用银电极作指示电极。
【判断题】
某氟离子选择性电极KF-,cl-=10-5,若使CI-对F-产生的误差小于0.1%,则待测溶液中CI-的活28、库仑分析法的基本原理是法拉第电解定律的应用。
【判断题】
恒电流库仑分析仪器主要有恒电流源、电解池和库仑计组成。
【判断题】
库仑分析的关键是保证电流效率的重复不变。
【判断题】
工作计量器具是否需要强制检定，可根据直接用于测量用途决定。
【判断题】
周期检定是按时间间隔和规定程序，对计量器具定期进行的一种后续检定。
【判断题】
计量器具经首次检定后的周期检定称为间隔检定。
【判断题】
天平及砝码应该及时检定，一般规定检定间隔不超过一年。
【判断题】
经计量检定的测量仪器必须在仪器上有检定标记。
【判断题】
经计量检定后的不合格测量仪器不需要在仪器上有任何标记，只要停用就可以。
【判断题】
检定标记是指施加于测量仪器上证明其已经检定并符合要求的标记。
【判断题】
在规定条件下，为确定测量仪器或测量系统所指示的量值，或实物量具或参考标准所代表的量值，与对应的由标准所复现的量值之间关系的一组操作被定义为校准。
【单选题】
《中华人民共和国大气污染防治法》第五十三条规定，在用机动车应当按照国家或者地方的有关规定，由机动车（）定期对其进行排放检验。经检验合格的，方可上道路行驶。未经检验合格的，公安机关交通管理部门不得核发安全技术检验合格标志。___
A. 安全技术检验机构
B. 排放检验机构
C. 生态环境执法机构
D. 综检机构
推荐试题
【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
【单选题】
) 1. Even Tony’s six-year-old son asked him ______ smoking.
A. stops B. stopped C. to stop D. stopping
【单选题】
2.—What do you think of the lecture of Li Yang’s Crazy English?
— I think it’s _______ , but someone thinks it’s much too ________.
A. wonderful enough; bored B. enough wonderful; boring
C. enough wonderful; bored D. wonderful enough; boring
【单选题】
3.—He didn’t go to the lecture this morning, did he?
— _____ ．Though he was not feeling very well．
A. No, he didnt B. Yes; he did C. No, he did D. Yes, he didnt
【单选题】
4. If you read a lot, your life ______ full of pleasure.
A. will be B. is C. be D. was
【单选题】
5. The black bag _________ be Annas. She has a blue one.
A. should B. cant C. wouldnt D. could
【单选题】
6. Susan, why are you still here? They are all ready to start.
Im sorry, but I _________ when to start.
A. dont tell B. wasnt told C. didnt tell D. havent told
【单选题】
7.—Why dont you choose the red tie?
—For me, it doesn’t _____ my shirt very well．
A. fix B. accept C. compare D. match
【单选题】
8. — Could you tell me ______? I must find him．
— Sorry．I don’t know．But he was here just now．
A. where Tom was B. where Tom is
C. where has Tom gone D. where can I find Tom
【单选题】
9. —What did Mr Green say to you?
— What a heavy rain! How did you come here? He asked________.
A. at all B. in fact C. in surprise D. as a result
【单选题】
10. I often see Tom on the playground．When I passed the playground yesterday, I saw him ．
A. play; playing B. to play; play C. playing; to play D. playing; play
【单选题】
11. — Mum, could I have ____________ to drink?
— Oh, dear．You can only drink some water．There is _________ in the kitchen．
A. anything; else something B. anything; something else
C. something; else nothing D. something; nothing else
【单选题】
12. We all know that learning a foreign language _______ time and effort.
A. requires B. reduces C. removes D. repeats
【单选题】
13. Her son __________ Coke, but now he __________ milk．
A. is used to drinking; used to drink B. used to drink; uses to drink
C. used to drink; is used to drinking D. is used to drink; is drinking
【单选题】
14. I don’t know the teacher is talking with Miss Wang．
A. what B. whom C. who D. which
【单选题】
15.Millie does __________ that many people are thankful to her．
A. such an important and helpful job B. so important and helpful work
C. a very important and helpful job D. such an important and helpful work
【单选题】
16. I think eating more vegetables is good _______ our health.
—Yes, I agree _______ you.
A. at, to B. for, with C. to, to D. for, to
【单选题】
17. I often go on holiday with my parents _____ summer.
A. in B. at C. on D. of
【单选题】
18. I called you at 4:00 yesterday afternoon, but nobody answered.
Sorry, I ______ with my friends at that time.
A. had swum B. swam C. would swim D. was swimming
【单选题】
19.––Who is on the playground? ---__________．
A. Never B. None C. No one D. A lot
【单选题】
20. The schoolboy ______ a blind man cross the street yesterday.
A. helps B. helped C. will help D. has helped
【单选题】
21. —The 2010 World Expo which will last 184 days will be held in Shanghai on May 1st.
—________exciting news! We shall try our best to support it.
A. How B. How an C. What D. What an
【单选题】
22. They preferred ______ in bed rather than _____ horses．
A. to lie; to ride B. lying; riding C. lying; ride D. to lie; ride
【单选题】
23. —What was Jim wearing at the party?
— Nothing _______. He was in his usual shirt and jeans.
A. special B. simple C. important D. interesting
【单选题】
24. The 2016 Olympic Games ________ in Brazil. Would you like to go there?
Maybe, if possible.
A. are held B. will be held C. were held D. have been held
【单选题】
25. — David, look at the man in white over there．Can you tell me _______ ?
—He is a doctor．
A. who is he B. who he is C．what does he do D. what he does
【单选题】
( ) 26.With help from a Mr. H, you can__________.
A. stop wearing your watch B. get new books and objects
C. finish your homework on time D. know when parents or teachers are near
【单选题】
( ) 27. A PENGO WATCH CONTROL can help you to ______________.
A. repair your TV B. put away your books and objects
C. become a James Bond D. get a daily weather report
【单选题】
( ) 28. You can get your Mr. H for___________.
A. $299 B. $499 C. $199 D. $99
【单选题】
( ) 29. When was canned food invented?
A. In 1870. B. In 1810. C. In 1902. D. In 1926.
【单选题】
( ) 30. After the trip to the Arctic, Clarence Birdseye invented ____________.
A. canned food B. can openers
C. frozen food D. air conditioning
