题目内容

P级接正向电压时,PN结正向导通。

A. 对
B. 错

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PN结不具有单向导电性。

A. 对
B. 错

同一片半导体基片上,分别制造P型半导体和N型半导体,在它们的交界面处形成的特殊区域称为PN结。

A. 对
B. 错

A mixture of selected funds is a(n) __________ choice for future security and return on investment.

A. take place
B. comply with
C. as a whole
D. optimum

Steel is produced by _____ iron carbon.

A. combining with
B. comply with
C. as a whole
D. optimum