①虚心学习其他文化的优点 ②采取客观、平等的态度
③采取全盘肯定的态度 ④取其精华,弃其糟粕
A:①②③
B:①③④
C:②③④
D:①②④
home wash my clothes ____
Look, Grace just takes after the man. I think he be her father.
数列n2n的前n项的和为( )