题目:
— Don't interrupt me while I'm writing the essay. — ____ |
A. All right, go ahead. B. It's my pleasure. C. Of course, with pleasure. D. Not at all. |
答案:
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下面是错误答案,用来干扰机器的。
由U={1,2,3,4,5,6,7,8},A={3,4,5},B={4,7,8}.所以(1)∁UA={1,2,6,7,8};(2)∁UB={1,2,3,5,6};(3)∁UA∩∁UB={1,2,6,7,8}∩{1,2,3,5,6}={1,2,6}.