如图所示水平面上一个静止的小车上有一弯杆，其下端固定一个小球，小球的受力示意图正确的是（　　）

叶片表皮的保卫细胞中含有叶绿素，所以保卫细胞可以进行光合作用。（判断对错）

    This is my school. There are many trees and flowers in it. It's very beautiful. The teaching building is big and tall. There is a big playground in our school. After 4:30 in the afternoon, many students come to the playground to play football and some students play table tennis in the table tennis room. There are 1,200 students and 25 classes in our school. The students all like to study. The teachers in our school are very good. They help the students to study and the students like them, too

行走于青春季节的你，生活天天在刷新。是什么带来这些变化？是身边的亲人﹑老师和朋友，还是内心的勇气﹑乐观﹑执着？是校内的阅读﹑思考﹑互助，还是野外的漫步﹑远足﹑探险？当然，也许有人会说是发现，是感悟，是挫败……不论哪种，都陪伴着你的旅程，刷新着你的生活。
请以“       刷新着我的生活”为题写一篇不少于600字的作文。

A. B. C.

D. E. F.