以should studends have after-school on weekends?为题写一篇英语短文（急!）
题目
以should studends have after-school on weekends?为题写一篇英语短文（急!）
答案
should studends have after-school on weekends?
Weekends have brought about many advantages to students. Most importantly, they have lightened the burden on students. It provides students, for example, with much leisure time and enables them to play on the playground or take part in recreational activities. Entertainment brings them new energy, so they can meet their new week vigorously.
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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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