选出你所听到的句子( )
A:Look at the pig.It's big.
B:Look!The pig is big.
计算:(2015)0+3﹣1=____ .
已知集合M=y|y=2x,x>0,N=x|y=lg2x-x2,则M∩N为( )
出现下图的场景是因为( )