题目内容

In the same way that the arrival of mechanical equipment meant fewer farm jobs, theadventof the computer has led to fewer manufacturing jobs._________________________

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Many corporations like to be seen asbenivolentand will actively seek publicity for theircharitabledonations._________________________

Throughout history, theprevalentauthoritypattern in families has been patriarchy, in which males are in control. In only a few societies has matriarchybeen thecustomaryauthority pattern._________

实际生活中三极管晶体管的主要应用有：（）。

A. 放大电路
B. 电子开关
C. 续流电路
D. 整流电路

下列几种状态中不属于三极管工作特性的是（）。

A. 整流
B. 放大
C. 饱和
D. 截止