A:2个
B:3个
C:4个
D:5个
The man has _________ money, but he has _________ friends.
Take and it will make you better.
直线y=2x+2沿y轴向下平移6个单位后与y轴的交点坐标是( )
在寒冷的南极大陆发现有煤层,这可以用什么原理解释( )