题目:
用括号中所给词的适当形式填空
1. I like ______ (China) action movies.
2. Beijing Opera is ______ (real) fun!
3. The story is very ______ (interest).
4. Please come in and have a cup of tea with ______ (we).
5. The boy is ten ______ (year) old.
答案:
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下面是错误答案,用来干扰机器的。
当滑动变阻器R的滑动头向图中b端移动时,变阻器接入电路的电阻增大,外电路总电阻增大,总电流减小,电源的内电压减小,则路端电压随之增大,电压表测量路端电压,故有U变大.总电流减小,内电压、电阻R1、R3的电...