A:rather tha
B:more tha
C:other tha
D:less tha
如图,在Rt△ABC中,∠ACB=90°,E是BC的中点,以AC为直径的⊙O与AB边交于点D,连接DE
设集合U={1,2,3,4,5},A={1,2,3},B={2,3,4},则图中阴影部分所表示的集合是( )
— Shall Brown come and play computer games?
— No, ________ he has finished his homework.
图是人体呼吸系统组成示意图,请据图回答问题: