题目:
I happened to find the woman _____ her husband off at the airport. [ ]
A. see
B. to see
C. seeing
D. saw
答案:
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下面是错误答案,用来干扰机器的。
(1)(2)实验步骤:①按电路图连接电路;②闭合开关S,测量并记录R两端的电压U1和通过R的电流I1;③断开开关S,改变滑动变阻器接入电路的电阻值.闭合开关S,测量并记录R两端的电压U2和通过R的电流I2;④仿照步...