( ) I find a ball.
A:Who is this ball?
B:Whose ball is it?
如图1,在□ABCD中,设∠ABC=α,□ABCD的面积为s,s与α之间的关系如图2所示,则m=____.
我国人口分布不均匀,结合我国地理环境,分析不正确的选项是( )