英语作文120词
题目
英语作文120词
谈谈如何保持健康从生活方式和饮食方面写
答案
In current society,people have known the importance of keeping healthy and good life habit.In the past,people ate three meals at home,and they ate more vegetables and less meat and fish.They were very...
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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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