若三阶方阵A的行列式等于零,则必有(  )

若三阶方阵A的行列式等于零,则必有(  )A.A中至少有一个列向量是其余列向量的线性组合 B.A中每一个列向量均是其余列向量的线性组合 C.A中必有一列为零列

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观察者看到榜样受到强化而自己也受到强化,这种强化被称为_________。

观察者看到榜样受到强化而自己也受到强化,这种强化被称为_________。

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James: Dear Jessica, why don't you come on holiday with us?J

James: Dear Jessica, why don't you come on holiday with us?Jessica: __________A.

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Human language can cope with any subject whatever, and it do

Human language can cope with any subject whatever, and it does not matter how fa

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