I don't like to talk with him; he has a very____(粗鲁的)manner.

用3个棱长是3cm的正方体排成一行拼成一个长方体，拼成的长方体的表面积是____ cm²．　

如图所示，∠E=∠F=90°，∠B=∠C，AE=AF，有以下结论：

①EM=FN；

②CD=DN；

③∠FAN=∠EAM；

④△ACN≌△ABM．

其中正确结论的个数为（　　）

    Look at this. What's this in English, do you know? Ah, it's a photo. Who's that in the photo? It's Li Yan. Li Yan is my good friend. She is a beautiful girl. Who's that? The boy in black? It's Jim. He is an English boy. He is very cool. He is my friend, too. We are all in Class 3,Grade 7. I like Jim and Li Yan.