请各位达人帮忙写一篇作文(英文)
题目
请各位达人帮忙写一篇作文(英文)
有一棵树,树边有草.树下有个男孩在拍皮球.(要写出五句)
答案
There's a tree.Grass and a boy are under the tree.What's the boy doing?Oh,he's playing with a ball.He looks very happy.
凑合着吧……
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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