题目内容

要使三极管工作在截止区,则需发射结反偏,集电结反偏。

A. 对
B. 错

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满足IC=βIB的关系时,三极管一定工作在放大区。

A. 对
B. 错

The proposal put forward yesterday a lot of attention.

A. attracted
B. gathered
C. assembled
D. yielded

I didn't tell her the truth,but I her.

A. ought tell
B. must have told
C. must tell
D. should have told

Andersen liked toall kinds of stories for kids.

A. adjust to
B. appeal to
C. make up
D. take away