RC电路在换路前UC（0-）=0，则UC（0+）（）A、﹥0V B、＝0V C、﹤0_爱下问搜题

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问题单项选择题

RC电路在换路前U_C（0_-）=0，则U_C（0₊）（）

A、﹥0V

B、＝0V

C、﹤0V

D、≠0V

答案

参考答案：B

选择题

— Artistic people can be very difficult sometimes.
— Well, you married one. _____.

A. You name it
B. I've got it
C. I can't agree more
D. You should know

填空题

若两圆外切，圆心距为16 cm，且两圆的半径之比为5：3，则大圆的半径为______cm，小圆的半径为______cm．