A:土地问题
B:资金问题
C:劳动力问题
D:统一问题
若U={1,2,3,4,5,6},M={1,2,4},N={2,3,6},则∁U(M∪N)=( )
图例中表示铁路的是( )
一 What do you think of the new movie?
— To tell you the truth, I think it's boring.