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【单选题】
用万用表测二极管的正反向电阻来判断二极管的性能好坏,性能优良的二极管应该是( )。
A.
正反向电阻都等于0
B.
正反向电阻都无穷大
C.
正反向电阻悬殊不大
D.
反向电阻远远大于正向电阻
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