A:as boring as
B:not so bored as
C:as interesting as
D:not so interested as
用钢笔描红。
钉子____ 锤子____ 难受____
已知全集U={1,2,3,4,5,6},集合A={1,2,5},∁UB={4,5,6},则集合A∩B=( )
根据图中a、b、c三种固体物质的溶解度曲线,回答下列问题: