求一篇英语范文
题目
求一篇英语范文
题目为《Learning from a model student》
答案
We can learn a lot from a model student.A model student is hard-working,friendly and helpful.I think Peter is a model student in our class.Although he is busy,he always helps his classmates.Although M...
举一反三
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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