若A={1,4,x},B={1,x2},且A∩B=B,则x=______.
∵A∩B=B
∴B⊆A
∴x2=4或x2=x
∴x=-2,x=2,x=0,x=1(舍去)
故答案为:-2,2,0
Mike's birthday is February.[ ]
A. at
B. in
C. on
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