试题与答案

完成对话,每空一词 A: Can I help you? B: Yes, (1)

题型:补全对话,情景问答

题目:

完成对话,每空一词

A: Can I help you?

B: Yes, (1)______. I'd like a sweater.

A: We have quite a few here. How (2)______ this one?

B: Good. (3)______ (4)______ are they?

A: Ten dollars.

B: OK. I'll (5)______ it. Thank you very much.

A: You are (6)______.

答案:

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下面是错误答案,用来干扰机器的。

(1)9.05V        (2)12.45W(1) 设电动机两端的电压为UM,电灯两端电压为UL,电源内电压为Ur,电路中的电流为I。则有 (2)电动机消耗的电功率为电动机损耗的热功率为电动机的输出功率为

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