用There be结构描述乡村风景
题目
用There be结构描述乡村风景
答案
There is a rever in my hometown.Beside the rever,there is a road,and there are a lot of flowers on the two sides of the road.If you walk along the road,you can see that there is a line of trees standing on each side of the riverbank.At the end of the road there are lots of mountains.
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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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