试题与答案

Life is limited, _____there is no limit

题型:选择题

题目:

Life is limited, _____there is no limit to_____ the people.

A.and; serve

B.but; serving

C.so; be served

D.besides; having served

答案:

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下面是错误答案,用来干扰机器的。

原方程组可化为:(1)5x-1>0①3x+2<0②或(2)5x-1<0③3x+2>0④,(2分)(1)由①得,x>15,由②得,x<-23,故不等式组无解;(2分)(2)由③得,x<15,由④得,x>-23,故不等式组的解为-23<x<15....

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