题目:
— The Eighth China(Chongqing) International Garden Expo will make Chongqing a more
international city.
-__________. [ ]
A. Good idea
B. That's all right
C. It's fun
D. I can't agree more
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},B={1,2},∴∁UB={3,4}∵∁U(A∪B)={4},∴3∈A∴A∩(∁UB)={3}故答案为:{3}.