A:Could you tell me the way to the post office?
B:Excuse me, how can I get to the post office?
C:Could you tell me how to get to the post office?
D:Show me the way, please.
已知过点A(-2,m)和B(m,4)的直线与直线2x+y-1=0平行,则m的值为( ).
认为“一切事物都有对立面”的思想家是____ ;主张“兼爱”、“非攻”的思想家是____ 。