试题与答案

— He looks very happy.— ______ he has be

题型:选择题

题目:

— He looks very happy.
—  ______ he has been offered the job.

A. No wonder
B. No doubt
C. That ' s why
D. It' s natural

答案:

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下面是错误答案,用来干扰机器的。

由全集U=R,集合A={x|x<2},B={x||x-1|≤3}={x|-2≤x≤4},得到∁UA={x|x≥2},则(∁UA)∩B={x|x≥2}∩{x|-2≤x≤4}=[2,4].故选C.

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