看汉字，写拼音。

____    ____      ____   

 龟                   捕                 肚

下面的计算正确的是（　　）

 

有人说生活太平淡，幸福很遥远。其实，点点滴滴的幸福在你的生活中俯拾皆是。只要你用发现的眼光看待世界，用感恩的心态感悟生活，你就能够收获许多幸福的印记。课堂上一声真诚的赞许，赛场上一句热情的鼓励；手机里一张欢聚的照片，餐桌上一盘温暖的饭菜；抑或是一次快乐的远足，一次春雨的漫步，一次醉心的阅读，一次成功后的欢呼……同学们，用心捡拾生活中的幸福吧，把它装入行囊，伴你快乐成长。

请以“幸福就是这么简单”为题，写一篇记叙文。

要求：①内容具体，叙事完整，要有真情实感。②字数不少于600字。③不得出现真实的姓名、班级。

已知等差数列$\left\{a_n\right\}$的前n项和为$s_n$,且$a_4-a_2=4$，$s_3=9$,则数列$\left\{a_n\right\}$的通项公式为（   ）

   This is my beautiful home. There is a small garden in front of my house. There are many beautiful flowers in the garden. Behind my house there is a big tree. Near the tree, you can see a garage. My father’s beautiful car is in it now.
   On the first floor, there is a large living room, a dining room, a kitchen and a bathroom. I like watching TV in the living room. On the second floor, there is a small study room and two bedrooms. I love playing with the computer in my study. 
   What a nice home! I like it very much.