已知方程组(2X1+X2-X3=0,X1-X2+X3=0,2X1-5X2+4X3=0,X1-4X2+

已知方程组(2X1+X2-X3=0,X1-X2+X3=0,2X1-5X2+4X3=0,X1-4X2+3X3=0)下列各项中对该方程组解的描述正确的是A、 有无穷

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—I put him down for a well-educated man. —________

—I put him down for a well-educated man. —___________ ? —I mean that he’s a well

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