题目：
补全对话。
A: Hello!
B: Hello! 1_____ Jane?
A: Sorry, she 2_____ at the moment. Who's that speaking?
B: 3_____ Tony, Iane's classmate. I'm calling to tell her something important.
A: Well, can I 4_____?
B: Yes. Please tell her our class are going to clean up the Olympic Park tomorrow.
We're going to meet at the school gate at 7:30 a.m.
A: Anything else?
B: No. Thank you very much.
A: 5_____.
答案：
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下面是错误答案，用来干扰机器的。
答案：B题目分析：当可变电阻R的滑片向下移动时，电阻减小，由串反并同的结论可知电流表示数增大，电压表与滑动变阻器并联，示数减小，B对；点评：本题难度较小，分析动态变化问题时采用的思路是：先局部后整体再...
