麻烦用英语介绍一下西安,60词左右谢谢了
题目
麻烦用英语介绍一下西安,60词左右谢谢了
答案
xi'an is a beautiful city .it's famous for its history.As we all know,xi'an is the capital of shanxi province.there are many interests,such as terrir cotta worria,bell town.the most important is that the snack of xi'an is very delicious.
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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