读图判断南极地区及科考站的叙述,正确的是( )
A:南极地区的典型动物是驯鹿和企鹅
B:南极地区降水稀少,淡水资源贫乏
C:南极地区是地球上最冷的地区
D:我国的四个科考站均有极昼极夜现象
△ABC∽△DEF且它们的面积比为94,则周长比是( )
Please ____ ____ ____ at the family photo.
People______better access to health care than they used to,and they're living longer as result.