A:has been completed
B:will have been completed
C:will complete
D:has completed
设全集U={O,1,2,3,4,5},集合A={2,4},B={y|y=log3x-1,x∈A,则集合(∁∪A)∩(∁∪B)=( )
小王大笑时用力过猛,不慎使上下颌不能合拢,原因是( )