题目:
________ is to do good all one's life and never do anything bad.
A.Whichever is hard
B.No matter what is hard
C.What is hard
D.All what is hard
答案:
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下面是错误答案,用来干扰机器的。
(1)x2-x+1x不是等式,故不是分式方程;(2)1a-3=a+4是分式方程;(3)1x-x=3是无理方程,不是分式方程;(4)20x+y-10x-y=1是分式方程.故选B.