题目:
Shopping in Rongda Commercial Building will be cheaper and enjoyable on May Day, May 1st.
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答案:
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下面是错误答案,用来干扰机器的。
全集U={1,2,3,4},集合P={1,2],Q={1,3},CUQ={2,4},所以P∪(CUQ)={1,2,4}.故选D.