I want to buy a nice present _______ my mother and I must give it ______ her myself.
A:for, to
B:to, for
C:for, for
D:with, to
下列各句中,划线的成语使用不恰当的一句是( )
某绿色植物的叶肉细胞中存在两种主要的代谢过程,如图所示。对此解释错误的是( )
已知A=x|y=x-2,B=y|y=x2-2,则A∩B=( )