关于雨的形成的英语小短文
题目
关于雨的形成的英语小短文
答案
It is raining now and the rain will go to the river and run to the sea.The water in the sea will becone cloud under the sun and the cloud moves to our sky.the cloud falls down and it is raining now.You see,you are in the water,in the river,in the sea and in the cloud.
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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