如图所示为某学校一套校内备用供电系统，由一台内阻为1Ω的发电机向全校11个教室（每个教室有“220V，40W“的白炽灯6盏）供电．如果输电线的总电阻R是4Ω，升压变压器和降压变压器（都认为是理想变压器）的匝数比分别是1：4和4：1，那么：
下列图形是正方体展开图的是（ ）
—No, but I see ________ monkeys in it.
把下面的图片与所给的描述对号入座。A B C D E____ He is of medium height and build, with two small eyes. He is a pop singer. And he likes playing basketball very much. He is very popular with young people.____ He is short and of medium build. He has short black hair. He is a funny actor.____ She is heavy. She has short brown hair. She always wears glasses. She sings very well.____ He is very tall and has short black hair. He is a basketball player, and he plays it very well. Now he is a college student in Shanghai Jiaotong University.____ She is thin, with long black hair and big eyes. She is a movie star. She is in the play "Palace", and she is very popular with young people.
作图：（不写作法，但保留作图痕迹）．
在平面直角坐标系中有△AOB，运用所学知识，请你设计出一把风扇形状的图案，且是中心对称图形．
B
C
E
