would you like _________me about your fa 发布时间:2017-05-15 18:12 │ 来源:www.tikuol.com 题型:选择题 问题: would you like _________me about your father?[ ]A.tell B.to say C.to tell D.say
题型:选择题 如图所示,电源电压U保持不变,R1=10欧,R2=20欧。当S断开时,电流表示数是0.6安;当S闭合时,电压表示数为______伏,电流表示数为________安。电键S闭合前后R1消耗的功率之比为___________。 查看答案