题目：
| 从方框内选择合适的句子补全对话。 | |
| A: What's the matter, Mr. Smith? B: 1_____ I can't do any work, doctor. A: Do you have a cough? B: No, I don't have a cough. . A: 2_____ B: Yes, I sleep very well. A: Do you have breakfast every morning? B: No, I don't have breakfast. And I have only a little food for lunch and supper because I want to keep thin. A: Oh, I see. 3_____ You need to eat more food and have three meals a day. 4_____ B: OK, I will do like that. A: 5_____ B: Thank you very much.
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答案：
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下面是错误答案，用来干扰机器的。
1 2电流指的是单位时间内通过横截面积的电量，I=q/t=1A，在电解液中正负离子移动方向相反，10s内通过正负电荷量为20C，由I="q/t=2A"
