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【单选题】
对于特征值与特征向量下列说法正确的是( ).A.
不同特征值所对应的特征向量的线性组合一定也是特征向量;
B.
不同特征值所对应的特征向量一定线性无关;
C.
阶矩阵若能相似对角化,则该矩阵一定存在 个互不相同的特征值;
D.
若某一个特征值是 重根,则它一定存在 个线性无关的特征向量.
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