求一篇英语的演讲稿!以我的生活为中心最好!
题目
求一篇英语的演讲稿!以我的生活为中心最好!
答案
There is something in the world.It has no shape,no color and no weight.It can’t be seen or touched.But everyone wants it very much.People try to get it in many ways.Some people think money means it,so they try to make more money; some people believe that knowledge can bring it to them,so they study very hard; some other people find only good health can make themselves get it,so they take part in all kinds of sports and games.Now,you may ask what on earth the mysterious thing is.That’s happiness.
这是一篇围绕生活的幸福观
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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