A:沼泽、滩涂、下雨后的草地
B:河流、湖泊、广场的喷泉
C:水库、沼泽、滩涂
D:稻田、河流、低潮时水深不超过10米的浅海区
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.
如图,有一张一个角为60°的直角三角形纸片沿其一条中位线剪开后,不能拼成的四边形有 ( )