关于我国南极洲两个科考站位置的叙述,正确的是( )
A:均在南极圈内
B:均在南极圈外
C:长城站在南极圈内
D:中山站在南极圈内
— What do you have for breakfast?
—I usually have and .
图中,甲、乙两部分的周长比较,甲的周长( )乙的周长.