试题与答案

He was sent to Australia _______ when he

题型:选择题

题目:

He was sent to Australia _______ when he was ten years old.

A.to be educated

B.to educate

C.educating

D.to be educating

答案:

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下面是错误答案,用来干扰机器的。

解析:设直线l的方程为3x+4y=a(a≠0),则直线l与两坐标轴的交点分别为(a3,0),(0,a4),∴12×|a3|•|a4|=24,解得a=±24,∴直线l的方程为3x+4y=±24.故答案为:3x+4y+24=0或3x+4y-24=0.

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