A:50π
B:100π
C:200π
D:300π
过多边形的一个顶点的所有对角线把多边形分成8个三角形,这个多边形的边数是( )
读图回答
由此判断亚洲地势( )
Research shows that people feel unhappy and worried when they have nothing to do.________,the happiest are those who are busy.
三百二十九万五千零八写作:____
六千零四十万零四写作:____