从一个n边形的同一个顶点出发,分别连接这个顶点与其余各顶点,若把这个多边形分割成6个三角形,则n的值是____.
从方框中选词并用其适当形式填空
Many____like playing computer games after school. Rui Chenggang is a ____ from CCTV. Mrs Green likes writing ____for children.As a____ , he works late at night.During big festivals, the ____ are very busy.
①中美两国之间存在共同利益 ②中美两国的根本利益趋于一致
③国际关系的实质是一种利益关系 ④利益对立是引起国家冲突的根源