Thanks to the Internet, different kinds of information _______ in a short time.
A:can be learned
B:has been learned
C:can learn
D:has learned
下雨前蜻蜓低飞是因为蜻蜓飞不高。( )
选择占格完全相同的一项是_____。
y i w u ü c ch b j g
亚热带常绿阔叶林主要分布在我国的 ( )