图中的两个圆柱体底面半径相同而高度不同,关于这两个圆柱体的视图说法正确的是( )
A:主视图相同
B:俯视图相同
C:左视图相同
D:主视图、俯视图、左视图都相同
下列方法中,不能用于实验室制取氨气的是( )
① How much is it? ____ A. OK. Here you are.
② Can I try them on? ____ B. It's $89.
③ Is it too expensive? ____ C. It's very pretty.
④ How do you like this skirt? ____ D. Yes,it is.