题目

正方形在太阳光的投影下得到的几何图形一定是                                (   )A．正方形．B．平行四边形或一条线段．C．矩形．D．菱形 答案：B解析:略–I’ll come to see your performance at 10:00 tomorrow morning.–I’m sorry, by then my performance_____ and I _____ reporters in the meeting room.A．will end ; will meetB．will have ended ;will be meeting C．will be ended; am going to meetD．is to end ; will meet