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【单选题】
对于显色反应一般应满足什么要求?A.
灵敏度高 , 通常需要 ε ≥10 3
B.
有色化合物与显色剂之间的 Dl 要小
C.
显色剂的浓度要大
D.
有色化合物的组成恒定、化学性质稳定
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反馈参考答案：
举一反三
【单选题】The candidate tried to cover _______ her nervousness as she waited to make her speech.
A.
up
B.
on
C.
off
D.
against
【简答题】Fill in the blanks with a proper word. Change the form where necessary. hinder disguise confess displayed disgust commence bloom disapprove retain tackle enormous superior manipula...
【单选题】During the interview, every candidate(应试者)tried to _______the best in themselves.
A.
figure out
B.
bring out
C.
find out
D.
go out
【简答题】pull... through bring out struck terror into During the interview, every candidate tried to the best in themselves.
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