如图，五边形ABCDE是由五边形FGHMN经过位似变换得到的，点O是位似中心，F、G、H、M、N分别是OA、OB、OC、OD、OE的中点，则五边形ABCDE与五边形FGHMN的面积比是（　　）

阅读短文，下列问题

A

“Class, tomorrow I want you to boring a cup of macaroni(通心粉) for our craft class, OK?"

     I was afraid of the next day because I knew we had no macaroni at home. Living in an alcoholicenvironment, we never had too much of anything except beer bottles.

      I went home after school:  I knew that the local bottle shop gave ten cents for a beer bottle, so I decided to sell some bottles to get money for macaroni.

     I started collecting the bottles and sold them. I earned eighty cents. Although I did my best, I still had no macaroni for my craft class.

     "Weren't you listening when I asked you to bring it, John?" my teacher asked.

     I was embarrassed. I didn't know what to say and other children started laughing. Then a little girl, Rosalyn, who sat beside me turned to me and said, “You can have some of mine." She gave some macaroni to me. 

     I didn't take her macaroni or say thanks to her. However, I felt thankful for her kindness. Once, my life was full of anger arid hurt. I kept kind people like Rosalyn away, but after that class, I changed my attitude. I thanked all the people like Rosalyn that made this world a better place to live in.

①除去乙烷中少量的乙烯：通入酸性高锰酸钾溶液中；

②除去乙酸乙酯中的乙酸：用饱和碳酸钠溶液洗涤，分液、干燥、蒸馏；

③除去苯中少量的苯酚：加入足量浓溴水后过滤；

④除去乙醇中少量的乙酸：加足量生石灰，蒸馏．