A:①②
B:①④
C:②③
D:③④
— ____ did you go to the zoo yesterday?
— _____7:20. ( )
设集合U={1,2,3,4,5,6},A={1,2,3},B={2,5,6},则A∩(∁UB)等于( )
看图列算式。
总共有几只金鱼?