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【单选题】
已知A是4阶方阵,且矩阵【图片】的秩为2,则【图片】是A的( )特征值.
A.
一重
B.
二重
C.
至少二重
D.
至多二重
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A.
斯洛廷
B.
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C.
泰勒
D.
奥本海默
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A.
直接税和间接税
B.
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C.
从价税和从量税
D.
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A.
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D.
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A.
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B.
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C.
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A.
机油压力过高
B.
机油压力过低
C.
气缸上部有金属敲击声
D.
突然加速或减速时,出现低沉、钝哑的“嘡嘡”声
E.
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A.
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B.
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C.
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D.
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E.
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A.
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B.
越小越好
C.
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D.
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