英语作文 我的旅行
题目
英语作文 我的旅行
答案
Last summer I went to Guilin with my parents .We visited Lijiang by boat.The weather was very clean and we could see a lot of fishes in the river.We also climbed the hills.The trees on the hills were ...
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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