____ He's my brother.
____ Who's that boy?
____ Yes, she is.
____ Is she your mother?
____ No, he isn't. He's my teacher.
____ Is he your father?
— I was listening carefully but I could not ________ everything he said. He spoke too many local idioms.
请探究两个等腰三角形相似的条件,用文字语言直接写出探究的结果即可.
如图是某校的平面示意图,如果分别用(3,﹣1)、(﹣3,2)表示图中图书馆和实验楼的位置,那么校门的位置可表示为 ____.
14-7-3=4