【单选题】【消耗次数:1】
若某最小相位系统的相角裕度<imgwidth="46"height="26"src="http://wljy.whut.edu.cn//uploadfiles/word/zdkzll002.files/image014.png">,则下列说法正确的是()。
不稳定;
只有当幅值裕度<imgwidth="46"height="28"src="../uploadfiles/word/zdkzll002.files/image015.png">时才稳定;
稳定;
不能判用相角裕度判断系统的稳定性。
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