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【判断题】
当给二极管加反向电压时,二极管的反向电流很小,而且在很大范围内基本上不随反向电压的变化而变化,此时二极管处于反向截止区。A.
正确
B.
错误
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【简答题】一篇完整的调研报告的主体结构通常总是由（）三部分组成。
【简答题】A．They are used to express feelings only. B．They can not be written down. C．They are simply sounds. D．They are mysterious.
【简答题】A．They are used to express feelings only. B．They can not be written down. C．They are simply sounds. D．They are mysterious.
【简答题】He said foreign universities will continue to welcome Chinese students, as not only they are a financial boon, but the majority are also hardworking and highly motivated.
【简答题】市场调研报告的结构体系应包括哪些内容?
【单选题】Not only ____ at music, but also they are ready to help others.
A.
they are talented
B.
they have been talented
C.
are they talented
D.
they have talented
【单选题】Not only they are a financial boon, but the majority are also hardworking and highly motivated .
A.
n.；v.ed/adj.
B.
adj.；n.
C.
n.；v.
D.
adj.；v.
【多选题】调查报告主体部分的结构方式由于调研主旨不同而不相一致，但基本结构方式主要有三种，即( )。
A.
横式结构
B.
纵式结构
C.
交叉结构
D.
树状结构
E.
分散结构
F.
集中结构
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