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
如图所示的实验操作,正确的是( )
对于下面科学符号中数字“2”的含义,理解错误的是( )
下列句中加线词语使用错误的一项是 ( )