题目内容
换路定则的实质是能量不能跃变,表现为()。
2020-12-16
A.换路前后瞬间电容电压不变
B.换路前后瞬间电阻电压不变
C.换路前后瞬间电感中电流不变
D.换路前后瞬间电阻中电流不变
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