问题
单项选择题
“互感”现象就是两个载流回路，一个回路的电流变化引起另一个回路产生感应（）的现象。
A.电阻
B.电流
C.电压
D.电压和电流
答案
参考答案：C
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“互感”现象就是两个载流回路，一个回路的电流变化引起另一个回路产生感应（）的现象。
A.电阻
B.电流
C.电压
D.电压和电流
参考答案：C
用方框内的词组的适当形式填空。
1. Ruby _____ with her friends yesterday evening. She didn't go back home until 11 o'clock. 2. Stop _____! You can't do that in the museum. 3. Holiy has _____ toys and she plans to give some to her cousins. 4. Linda _____ in the rain because she left her raincoat at home. 5. My little brother never _____. He always gets up early in the morning. |