求OE的长及经过O，D，C三点抛物线的解析式；

    I'm Tang Xinhua. I'm in Changsha No.10 Middle School. My favorite subject is Chinese. Ms. Deng is my Chinese teacher. I like her very much. And Mr. Li Ii is my English teacher. They are my good teachers, andthey are also my good friends.

    I have a good friend, Rick Smith. Rick is an English boy.He likes science very much, but I don't like it. He thinks science is very interesting. Rick最喜欢的颜色是蓝色。He often wears(穿) blue T—shirts.因为他每天做运动，he is very healthy. I like doing sports, too.

阅读下面一段文字，按要求写一篇作文

李嘉诚说：“鸡蛋，从外打破是食物，从内打破是生命。”人生亦如是，从外打破是压力，从内打破是成长。如果你等待别人从外打破你，那么你注定成为别人的食物;如果能自己从内打破，那么你会发现自己的成长相当于一种重生。

要求：请根据你对材料的理解，选择一个角度，自定立意，自拟文题，写一篇不少于800字的记叙文或议论文。