A:①
B:②
C:③
D:①和②
在平面直角坐标系中,△ABC的顶点坐标是A(﹣7,1),B(1,1),C(1,7).线段DE的端点坐标是D(7,﹣1),E(﹣1,﹣7).
—The song is very beautiful. It makes me .
—Oh, I don't like that style.
城市化过程必然会引起()