A:Were he still a child
B:If he is still a child
C:Did he realize he is wrong
D:He were still a child
计算:(3.14﹣2)0+(﹣3)2=____.
给出下列函数:①y=2x;②y=﹣2x+1;③y= 2x (x>0);④y=x2(x<1),其中y随x的增大而减小的函数是( )