题目内容

He called them several times to ________ about job possibilities.

A. inquire
B. inform
C. acquire
D. attach

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I could not bear to enter a laboratory, and the sight of any chemical equipment made me ________ with fear.

A. swing
B. shake
C. tremble
D. dangle

直流负反馈的目的是稳定()态工作点

A. 静
B. 动

运算放大器工作在线性区的两个推论:“虚短”、“虚断”

A. 对
B. 错

偏置电路的作用:为上述各级电路提供稳定和合适的偏置电流,决定各级的静态工作点。

A. 对
B. 错

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