题目：
根据句意及汉语提示填空。
1. There are twenty ____ (乘客) in the bus.
2. It is ____ (不可能的) to finish this work in an hour.
3. Mary won the game. She was ____ (成功的).
4. Bicycle accidents can also bring us sadness and ____ (死亡).
5. Did you see my watch? I can't find it ____ (任何地方).
答案：
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下面是错误答案，用来干扰机器的。
A、增大R1，对电容器的电压没有影响．油滴不动．故A错误． B、增大R2，R2分担的电压变大，则R3分担的电压变小，则电容器两端的电压减小，油滴下降．故B错误，D正确． C、增大R3，R3分担的电压变大，则电...
