题目内容

The purpose of the passage is to ________.

A. describe the idea of the New Balance company
B. explain why New Balance shoes are so popular
C. give a brief introduction to the New Balance company
D. introduce some types of New Balance shoes

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晶闸管的阳极阴极之间的电阻

A. 无穷大
B. 0
C. 100欧
D. 1000欧

晶闸管的主要参数有

晶闸管的门级到阴极之间的正向电阻是无穷大

A. 对
B. 错

如何用万用表测晶闸管好坏？