题目:
从A—J选项中选出能填入空白处的最佳选项补全对话。(选项中有两项是多余的) W: Excuse me, sir. M: Yes, 小题1: W: I have been here for an hour to meet my father. 小题2:___ M: Are you sure of the time his flight arrives? W: 小题3:He told me he would reach the airport at about 1:00 this afternoon M: That’s true. 小题4: W: What? BA506? Well, I don’t think it’s his flight number. M: 小题5: W: Yes, it’s VA407. I think...Oh, just a minute, please. Here. 小题6:Sorry, it’s VA408. M: VA408? I see, madam, 小题7:but it will be two hours and twenty minutes late because of the bad weather in New York. W: OK. 小题8:Thank you very much ,sir. M: Good luck! Madam.
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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)流过R0的最大电流约为:Imax=ER0=3.72000A=1.85×10-3A=1.85mA<2mA,电流表应使用:电流表A2(量程2mA,电阻RA2约50Ω),因为使用电流表A1时,电表示数太小,读数误差较大.(2)①实验器材只有电压表与电...