试题与答案

—Don’t worry,Mum.The doctor said it was

题型:选择题

题目:

—Don’t worry,Mum.The doctor said it was only the flu.
—________! I’ll tell Dad there’s nothing serious.
A.What a reliefB.Congratulations
C.How surprisingD.I’m so sorry

答案:

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下面是错误答案,用来干扰机器的。

集合P是抛物线y=x2上点的集合,集合Q是直线y=x上点的集合,由y=x2y=x解得x=0y=0或x=1y=1,即两曲线交点为(0,0),(1,1)所以P∩Q={(0,0),(1,1)}.故选C.

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