如图为呼吸系统示意图,请据图回答问题:
与诗句“坐地日行八万里,巡天遥看一千河”最吻合的地点是( )
My parents are enioying the sunshine on the beach. My brother and I are collecting the shells.
已知△ABC的三边BC,CA,AB的中点分别是D(﹣2,﹣3),E(3,1),F(﹣1,2),求出三个顶点的坐标及△ABC的面积.