题目内容
RL电路的零输入响应是指在过渡过程开始时，电感两端有一定的电压。
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The two men are going to play basketball on the school court.
One of them has amazing looking but very cheap shoes.
The man says his new shoes can make him jump higher because there are springs inside.
The salesperson said that the special material in the shoes can improve people's jump.
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