How I study English 为题,写一片150左右的作文
题目
How I study English 为题,写一片150左右的作文
答案
Learning English just like learning any other language,is hard work.So I have to spend much time practicing using English every day.I find it useful to listen to the teacher and take notes carefully i...
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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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