——Is the man reading?
——____________. He is swimming.
A:Yes, he is
B:No, he isn't
C:Yes, he does
D:No, he doesn't
下面图表数据说明的我国人口现状特点有( )①农村人口多②人口素质偏低③男女性别比失衡④人口老龄化速度加快