英语作文～请写一写你校的校规,并发表看法!
题目
英语作文～请写一写你校的校规,并发表看法!
要求：1、60~80词
2、语言通顺,没有语法错误
答案
Like every country has laws.Our school also has school rules.Students must get to school on time.They should wear school uniforms on weekdays.They shouldn't bring some things to school,such as,dangerous knives,cell phones and so on.They should respect each other and they shouldn't fight.If they go to school by bikes,their bikes should have brakes and bells.
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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