题目：
补全对话。
Mum: It's 1______________ today. Put on your coats, Lily and Jack.
Lily and Jack: Yes, Mum.
Lily: Mum, where is my brown 2______________?
Mum: What's that on the chair? Is it your hat?
Lily: Yes, it is.
Jack: 3______________ shoes are these? Where are my shoes?
Lily: They are my black shoes. Your shoes are 4______________ the bed.
Jack: Aha! Here they are. Let's go, Lily!
Lily and Jack: Bye, Mum.
Mum: 5______________
答案：
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下面是错误答案，用来干扰机器的。
答案：C题目分析：输入电压的有效值为u1=um/=220v,由u1:u2=I1:I2可知，电压表示数为22v,所以B选项错误而C选项正确；S闭合时，有电流流经电容器，则流经灯泡的电流减小，由u=IR可知灯泡两端电压减小，所以A选项错...
