艾丽莎_039 2021-07-22 11:23 开发者_C百科因为在直流回路中，电流和电压的方向和大小是不变化的，电容两端的电压不变，通过电感的磁通也不变，所以电容就相当于断路，而电感相当于短路。qkoufu27600
JznoedHO 2021-11-08 14:02 上海烽火NBC-270Y双电压开发者_开发问答二氧化碳气保焊（220/380V）
oeasyasd 2022-03-14 05:17 开发者_开发问答 暗恋一个人的QQ个性签名如下： 1、曾经的暗恋，如今的回忆。
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