问题
填空题
利用二极管的（），可将交流电变成（）。
答案
参考答案：单向导电性；直流电
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利用二极管的（），可将交流电变成（）。
参考答案：单向导电性；直流电
从方框中选择恰当的句子补全对话。（其中有两个多余） A: Hi, Mikc! B: Hello! A: ________ B: Yes, but one thing annoyed me. A: ________ B: On the bus, I saw a woman eating bananas and threw the banana skins out to the window. A: ________ B: I told her what she did was not right. A: You were right. Throwing the litter away will pollute the environment. B: I Agree with you. A: _________ B: She didn’t take my words at all. A: No wonder(难怪) you are so angry.
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