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问题 单项选择题

用于对下级机关布置工作，阐明工作活动的指导原则的指挥类文件，称为（）。

A.上行文

B.平行文

C.下行文

D.越级行文

答案

参考答案：B

选择题

Dorothy was always speaking highly of her role in the play, ___    , of course, made the others unhappy.

A．who

B．which

C．this

D．what
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选择题
people who often stay up too late are more likely to die of heart disease, ___________a study.
A. with the help of
B. because of
C. according to
D. as a result.
 
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