【单选题】【消耗次数：1】
若某元件的u-i特性曲线在任何时刻如图2-2所示，则此元件为()
①
线性、非时变电阻
②
线性、时变电阻
③
非线性、时变电阻
④
非线性、非时变电阻
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【判断题】
当非线性电阻两端电压与其电流的函数关系为<imgwidth="63"height="26"src="http://wljy.whut.edu.cn//uploadfiles/word/dlylx02.files/dlylx024252.png">时，这种电阻称为电压控制型电阻。
①
正确
②
错误
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