在如图所示的直角坐标系中A(-2,3),B(-5,1). (1)作出图形ABCD关于x轴对称的图形A 1 B 1 C 1 D 1 ; (2)求出图形A 1 B 1 C 1 D 1 的面积; (3)以图中E(-1,1)为位似中心,将图形ABCD放大2倍,并在点E的右侧作出放大后的图形A 2 B 2 C 2 D 2 ,并写出点C 2 的坐标.
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【多选题】The cornerstones of American economic boom after WWII were_____,_____,______.
【简答题】There is a boom in Internet-based instruction. In just a few years, 34 percent of American universities have begun offering some form of distance learning (DL), and among the larger schools, it’s clos...
【简答题】There is a boom in Internet-based instruction. In just a few years, 34 percent of American universities have begun offering some form of distance learning (DL), and among the larger schools, it’s clos...