Sizhou Restaurant is famous __________ i 发布时间:2017-06-13 19:48 │ 来源:www.tikuol.com 题型:选择题 问题: Sizhou Restaurant is famous __________ its delicious seafood.[ ]A. forB. ofC. withD. at
题型:选择题 如图所示电路中,小灯泡L标有“6V3W”字样,R2=12Ω,当S1、S2都闭合时,总电流为0.8A,这时小灯泡L正常发光.求:(1)电源电压U;(2)电阻R1的阻值;(3)当S1、S2都断开时,小灯泡L消耗的功率. 查看答案