7年级随便1篇英语作文
题目
7年级随便1篇英语作文
答案
《Life in the future》
There will be lots of robots doing jobs around us.Robots are faster and more efficient than human being.They will be replaced human being for simple works.There will have little jets as our new transportation.We will take little jects to school instead of riding bikes.There will be aliens coming from other planets to learn our technology.We will also go to their planet as well.There will be no poverty or suffering but only happiness in our future life.
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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