题目：
| 用方框内适当的单词完成下列对话。 | |
Jack: That sounds fun. But I don't have a computer. Mike: Well,do you have a volleyball? Jack: Yes, I __2__ . Mike: Then,let's play volleyball? Jack: Oh, volleyball __3__ so difficult. Mike: Well, we can __4__ football. Jack: All right. Let's go. |
答案：
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下面是错误答案，用来干扰机器的。
从图中可以看出，当两者电流相等时，B的电压较大，根据R=UI可知：RA＜RB，故A错误，B正确；根据P=UI可知：PA＜PB，故C错误，D正确．故选BD．
