题干
— Would you rather come on Friday or Saturday?
— ____
— ____
A：Yes, of course.
B：The other is better.
C：What’s the matter?
D：Either would suit me.
答案(点此获取答案解析）
D
的解集是M, 方程
的解集是N, 3∈M且3∈N,那么
等于 ( )