设集合U={1,2,3,4},M={1,2,3},N={2,3,4},则CU(M∩N)=[ ]
A.{1,2}
B.{2,3}
C.{2,4}
D.{1,4}
答案:D
—I visited the Forbidden City yesterday.
—Really? That _______ interesting. [ ]
A. sounds
B. sound
C. is sound
D. is sounding
风冷式冷凝器适用于冷凝温度()的制冷系统。
A.较高
B.较低
C.较大
D.较小