A:①②
B:③④
C:②④
D:①④
— ____ is that tall man?
— He is my brother.
下列属于东西走向的山脉是( )
已知x>0,y>0,若2yx+8xy>m2+2m恒成立,则实数m的取值范围是( )
— I'd love to, but I . I have much work to do.