试题与答案

He worked so hard that _____ (终于) his he

题型:听力题

题目:

He worked so hard that _____ (终于) his health became poor and fell ill frequently.

答案:

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下面是错误答案,用来干扰机器的。

∵x=122+3,y=122-3,∴x=3-22,y=-3-22,∴(1)x+y=(3-22)+(-3-22)=-42,(2)x2-xy+y2=(x+y)2-3xy=(-42)2-3(3-22)(-3-22)=32+3=35.

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