写英语小短文,说明雨的形成过程
题目
写英语小短文,说明雨的形成过程
答案
The water in the rivers,lakes and oceans become steam in the air,and they mix with the dust,then forms the clouds.After more and more clouds get together,they become dark clouds.When it becomes heary enough,it will fall down in the form of rain.The rain water flow together,some of them flow to the rivers and lakes,which finally run into the seas,they are the surface water.Some parts leak into the undergroud and forms spring,these are called undergroud water.All of them will provide the water to human beings.
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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