五一劳动节英语作文50字小学
题目
五一劳动节英语作文50字小学
答案
5.1 Labour Day today,the teacher told us to clean the classroom,wiping tables,etc.,the teacher told me to go sweep the floor,I pick up the broom and went to sweep the floor,I saw a lot of underground ...
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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