问题
判断题
交流无换向器电动机结构中包括变频电路。
答案
参考答案：对
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交流无换向器电动机结构中包括变频电路。
参考答案：对
| 情景对话，选择最佳答案补全对话。 | |
| Black is a teacher. He has a headache and goes to see a doctor. (B: Black ; D: doctor) D: Come in. Please sit down. B: Thank you, doctor. D: 1. B: Doctor, I have a headache …..a bad headache. D: I see. 2. B: I'm a teacher. D: A teacher ….um…..Do you smoke? B: Yes, I do. About fifteen cigarettes a day. D: 3. I mean, do you take any exercise? Do you play tennis? Do you swim? B: No, I don't have the time. 4. D: Now listen, please. You've got two problems, 5. . Neither of them is good for your health. You'd better stop smoking and take more exercise if you want to keep healthy.
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Wb/s
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