by guojie on 14 2 月, 2008
一个电源接着一个可调电阻(就是最简单的那种)形成回路 问:电阻上的功率与阻值成正比还是成反比? (请在10秒内作答)
Required.
Required. Not published.
If you have one.
Δ
Leave your comment