题目内容

半导体中有两种粒子参与导电,一种是带负电的,另一种是带正电的。

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硅二极管正向导通电压为____伏,锗二极管正向导通电压为___伏。

三极管实现放大作用的外部条件是:发射结加_,集电结加__。

一般情况下,晶体三极管的电流放大系数随温度的增加而__。

In an era of heightened heroism, who are the heroes among us? They can be ordinary people like Daniel Hernandez who ran through danger in a mass shooting to save his boss and Dory Stoddard who saved his wife by _______ her from the hail of bullets

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