下列净化水的方法中,净化程度最高的是( )
A:吸附
B:沉降
C:过滤
D:蒸馏
Hello,I'm Bill. I like swimming.This is my father.He likes reading.This is my mother.She likes singing.This is my brother.He likes skating.This is my sister.She likes dancing.What about you?
近地面大气主要的直接热源是( )
图中反映的城市功能区是( )