作文：阅读下列文字，按要求作文
      有人说：幸福是雨中妈妈送来的雨伞，幸福是课上老师投来的信任的目光，幸福是患难中人们无私的救助，幸福是节假日家人团聚时的晚餐……
对此，你一定有自己的理解。请以“幸福，就在我身边”为题写一篇作文。
      要求：①立意自定，文体自选（诗歌除外）。②字数不少于500字。③文中不能出现真实的人名、班级、校名。

两块相同的竖直木板间有质量均为m的两块相同的砖，用两个大小均为F的水平力压木板，使砖均静止不动，如图所示．设所有接触面间的动摩擦因数均为μ．则（　　）

A: Hello, sir, may I talk with you in English?
B: Of course.
A: I have learned English at school for one year. I have very few chances to talk with the English-speaking people.____ 
B: Oh, you speak English very well.
A: Thank you. By the way, ____ 
B: No, I’m not. ____ 
A: How long have you been in this city?
B: ____ 
A: I see. Do you like this city?
B:Yes. I like it very much. It’s a beautiful city.
A: Thank you.____