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问题 选择题

对公式R＝的理解，正确的说法是[ ]

A.电阻R跟电压U成正比

B.电阻R跟电流I成反比

C.电阻的大小等于电压与电流的比值

D.当电压U＝0，电阻R＝0

答案

C

填空题

若集合A={0，m}，B={1，2}，A∩B={1}，则实数m=______．
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填空题

下面各题划线部分都是错误的，请在题后横线上改正。

1. On Sunday, he's going to playing football. 改为: ___________________

2. She is listen to the music. 改为: ___________________

3. They're going to has a big trip. 改为: ___________________

4. I'm go to buy an English book in the bookstore. 改为: ___________________

5. What is you going to do? 改为: ___________________
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