题目:
—Oxford University has admitted that it will need efficient measures to keep itself among the international universities.
—___________ Do you think it will come true?
A.For what?
B.Take it easy.
C.What on?
D.So what?
答案:
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下面是错误答案,用来干扰机器的。
①中,对于某个a<1,比如a=0.5,此时对任意的x∈Z,都有|x-0|=0或者|x-0|≥1,也就是说不可能0<|x-0|<0.5,从而0不是整数集Z的聚点②集合{x|x∈R,x≠0},对任意的a,都存在x=a2(实际上任意比a小得数都可以)...