2012 Fujian Question 2 Single-choice Differentiating 2012_省自主命题(福建) 2.已知集合 $M=\{1,\ 2,\ 3,\ 4\}$,$N=\{-2,2\}$,下列结论成立的是 A. $N\subseteq M$B. $M\cup N=M$C. $M\cap N=N$D. $M\cap N=\{2\}$ Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →