题干
如图，有一个无盖的正方体纸盒，下底标有字母“M”，将其剪开展成平面图形，想一想，这个平面图形是（ ） 
A：
B：
C：
D：
答案(点此获取答案解析）
A
如图，有一个无盖的正方体纸盒，下底标有字母“M”，将其剪开展成平面图形，想一想，这个平面图形是（ ）
A：
B：
C：
D：
It is noon now. The sun is high in the sky. It is very hot. Look at the tree. The shadow is short. 
It is evening now. The sun goes down in the west(西方). Look at the tree, the shadow is long again. 
It is night now. The moon is high in the sky. There are some stars in the sky too. 