题目：
| 从方框中选出能填人空白处的最佳选项补全对话。（选项中有两项是多余的）。 | |
| A: Hello! May I speak to Tom, please? B: Speaking. 1._____ A: This is Bill. I called you yesterday, but you were not at home． B: 2._____I need to prepare something for my trip to Shanghai. A: Shanghai? That's where the World Expo(世博会)is being held. How lucky you are! B: So I am. 3._____ A: I'll have a birthday party next Friday. Would you like to come? B: 4._____ My plane will take off next Wednesday. A: What a pity that you can't come ! 5._____ B: Thank you very much. Bye! A: Bye!
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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）由图甲所示螺旋测微器可知，固定刻度示数为0.5mm，可动刻度示数为19.7×0.01mm=0.197mm，螺旋测微器示数为0.5mm+0.197mm=0.697mm．（2）由图示电路图可知，电流表采用外接法，由于电压表的分流作用，所测电...
