【单选题】【消耗次数：1】
<imgwidth="335"height="33"v:shapes="图片_x0020_168"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image166.png">
①
对称矩阵
②
非对称矩阵
③
反对称矩阵
④
不一定是对称矩阵
参考答案：
复制
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