求四篇英语作文,80字.
题目
求四篇英语作文,80字.
1.Dream
2.The Effects of Exercise on Our Health
3.Is A Test of Spoken English Necessary
4.Cars in America
答案
1.Dream My Dream Everyone has a dream. Now I'll talk about my dream i What is my dream? I often ask myself. When I was a little boy, I wanted to be a soldier with a gun so that I could defend our moth...
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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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