Welcome to Beijing英语小作文
题目
Welcome to Beijing英语小作文
60个单词左右.
答案
Welcome to Beijing!Beijing is the capital of China.It has a long history of over two thousand years.It has many famous places of interest.The Great Wall is known as one of the seven wonders of the world.The old imperial palace was built over six hundred years ago.
Beijing has a lot of delicious food too,like Beijing Duck.
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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