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【单选题】
电镜的分辨率为A.
0.2µm
B.
2µm
C.
0.2nm
D.
2nm
E.
0.3µm
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【简答题】二、把下面的单词按照正确的顺序排列成一句话。 1、customers, most, of, from, are, my, and, America, Russia. ( ) 2、are, a, nice, friend, you. ( ) 3、you, from, are, America? ( ) 4、your, customers, from,...
【简答题】C. Now listen to some tips for foreigners on how to do online-shopping in China. Listen carefully and supply the missing information to complete the summary China has a number of its own mature ______...
【单选题】A Foreign Trade Talk A company in America wants to import some toys and dolls from China. Mr. Baker, the representative of the American side, was sent to Shanghai to hold a business talk. Mr. Li from ...
A.
Because he has to ask his boss for instructions.
B.
Because he needs to wait for his boss’s arrival.
C.
Because he needs to get permission from his wife.
D.
Because he has to send telegrams to his customers.
【简答题】下列氧化剂：1.KClO3、2.Br2、3.FeCl3、4.KMnO4、5.H2O2，当其溶液中H+浓度增大时, 氧化能力增强的是。（直接写序号，中间不空格也不加标点符号）
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