下列描述错误的是（）
（单选题）下列说法正确的是
（单选题）有等式AB=0 ，则下列结论中正确的是（）
设A为m×n矩阵，齐次线性方程组Ax=0有非零解的充分必要条件是
（单选题）
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行列式的性质
考察行列式的性质，行列式互换两行位置，行列式的值变号，两次互换位置则行列式的值变为原来的值，和不为零
多做几道
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该科目易错题
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- What effect do the mountains have on winds?（）AMake them dry.BMake them wet.CMake them cool.D Make them weak.
- （）AissueBpassedCdebateDanotherE otherF internationalGrelatedH influenceIsawJprofessorKnationalLcomfortable
- （）AissueB passedCdebateDanotherEotherF internationalG relatedHinfluenceIsawJprofessorK nationalLcomfortable
- （）A issueBpassedC debateDanotherE otherFinternationalGrelatedHinfluenceIsawJprofessorKnationalLcomfortable
- （）AissueB passedCdebateDanotherEotherFinternationalGrelatedHinfluenceIsawJprofessorKnationalLcomfortable
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