工学

单选题Which factor has no effect on the fluorescence quantum yield molecule（）。A molecular structureB the presence of heavy atomsC the concentration of the solutionD the temperature of solution

题目
单选题
Which factor has no effect on the fluorescence quantum yield molecule（）。
A

molecular structure

B

the presence of heavy atoms

C

the concentration of the solution

D

the temperature of solution

参考答案和解析
正确答案： B
解析： 暂无解析
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相似问题和答案

第1题：

Extensive reporting on televison has helped to_____interest in a wide variety of sports and activities.

A.gather

B.generate

C.assemble

D.yield


答案：B

第2题：

(47)Only gradually was the by-product of the institution noted, and only more gradually still was this effect considered as a directive factor in the conduct of the institution. 此处译文为：


正确答案：
【结构分析】
Only gradually was the byproduct of the institution noted, and only more gradually still was this effect considered as a directive factor in the conduct of the institution.
这是一个并列句，两个并列分句都是部分倒装的形式(only加上副词置于句首的部分倒装)，前半句为only gradually置于句首的倒装，正常语序为The byproduct of the institution was noted only gradually;后半句为only more gradually still置于句首的倒装，正常语序为and this effect was still considered as a directive factor in the conduct of the institution only more gradually.
【词义推敲】
By-product 副产品
【翻译润色】
Only gradually was the byproduct of the institution noted慢慢的，社会机构的这种副产品才被人们注意到
and only more gradually still was this effect considered as a directive factor in the conduct of the institution而要把它作为机构运行的指导性因素，则更加缓慢得多
【参考译文】
慢慢的，社会机构的这种副产品才被人们注意到，而要把它作为机构运行的指导性因素，则更加缓慢得多。

第3题：

47Only gradually was the by-product of the institution noted, and only more gradually still was this effect considered as a directive factor in the conduct of the institution.


正确答案：

这个制度的副产品仅仅是为人们所逐步注意到，而在实施这种制度时，认为这种影响是一个制约因素则仍然更为缓慢。

第4题：

Which factor has the greatest impact on the estimated per unit labor cost for a project？（）

  • A、Historical information
  • B、Use of outside vendors
  • C、Change control processes
  • D、Human resource skill level requirements

正确答案:D

第5题：

--What you said is not__________with what you do, which has a bad effect on our kids.
--Sorry, I will change my ways.

A．consistent
B．controversial
C．confident
D．considerate

答案：A
解析：
考查固定搭配。句意为“你的言行不一致，这会对我们的孩子造成坏的影响”。Be consistent with“与……一致”，故选A。controversial“有争议的；引发争论的”，confident“自信的”，considerate“替人着想的；体贴的”，均不符合题意。

第6题：

Age is not the learner factor that has been an issue in second language acquisition research.()


参考答案：错误

第7题：

As compared to carbon dioxide, dry chemical has which advantage? ______.

A.Cleaner

B.Effective on metal fires

C.Greater range

D.More cooling effect


正确答案：C
与CO2相比，干粉灭火器有哪些优点？作用距离更远.

第8题：

Which of the following is NOT true?

A. Colour probably has an effect on us which we are not conscious of.

B. Our feelings about certain colours are purely psychology.

C. Food should never be packaged in brown.

D. Sugar sells badly in green wrappings.


正确答案：C
[解析] 通过阅读本文可知化妆品从来不用褐色包装，食品很少用蓝色包装。故选C。

第9题：

Which of the following statements is TRUE according to the passage?___________

A.Oceanic salinity has great effect on sea life
B.Many factors combine to cause changes in oceanic salinity
C.The movement of the water is related to the amount of salt
D.The temperature of the water has much to do with the oceanic salinity

答案：D
解析：
按照出题顺序，此题考查的是海水盐度变化的第三个原因。根据第四段可知，海水冻冰后，杂质析出，因此冰下的海水比冰冻前的盐度高；冰融化后，海水盐度又会降低。所以答案为D．即海水温度与盐度有很大关系。

第10题：

Which of the following has NO effect on controlling the access permissions needed to run the "date" command on the remote machine "Earth" using the following syntax？rsh Earth date（）。

  • A、The local file： /etc/.netrc
  • B、The remote file： ~/ .rhosts
  • C、The securetcpip command
  • D、The remote file： /etc/hosts.equiv

正确答案:A

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