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【简答题】
持久性有机污染物的特性包括 , , 和生物毒性。
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举一反三
【单选题】What will happen tomorrow?
A.
An annual gathering.
B.
A board meeting.
C.
A seminar.
D.
A store opening.
【单选题】按缓蚀剂对电极过程的影响可以将其分类为（）。
A.
阳极型缓蚀剂、阴极型缓蚀剂及混合型缓蚀剂
B.
无机缓蚀剂和有机缓蚀剂
C.
输气缓蚀剂和输油缓蚀剂
D.
硝酸盐缓蚀剂和胺类缓蚀剂
【单选题】按缓蚀剂对电极过程的影响可以将其分类为（）。
A.
阳极型缓蚀剂、阴极型缓蚀剂及混合型缓蚀
B.
无机缓蚀剂和输油缓蚀剂
C.
输气缓蚀剂和输油缓蚀剂
D.
硝酸盐缓蚀剂和胺类缓蚀剂
【简答题】缓蚀剂的类型可分为 和 。
【单选题】—Why are those people gathering in the middle of the street? — I don't know. There ____ be an accident. [ ]
A.
shall
B.
should
C.
can
D.
might
【判断题】Observation is an information gathering technique that allows the analyst to see firsthand how managers process and use information.
A.
正确
B.
错误
【判断题】An assembly is less formal than a conference, usually referring to a gathering of people.
A.
正确
B.
错误
【单选题】Gathering information from potential customers in an effort to determine their preferences is an example of using statistics in the field of ______.
A.
marketing research
B.
advertising
C.
operations
D.
finance
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