A:2A+3B=2C
B:A+3B=2C
C:3A+B=2C
D:A+B=C
下面这些图形分别是从哪个方向上看到的?( )
关于地球所处的宇宙环境的叙述,正确的是( )
She doesn't have any(一些) eggs, she wants to go shopping (去购物).