题目内容

PN结具有单向导电特性:____;____.

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电子电路通常分为____和 ___

二极管的最主要特征是____,即____; ____ 。

Payment can make online from your checking or savings account.

A. 对
B. 错

This type of loan is frequently useing for this purpose.

A. 对
B. 错

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