在海滩上英语作文
题目
在海滩上英语作文
答案
on the beach
It was a sunny day.I went to Beidaihe with my parents.It took us about four hours to get there by car.There were thousands of people on the beach.Some were playing with the sand.Some were boating and some were swimming in the sea.We walked on the beach for about two hours.Then we built a sand castle.We also picked up lots of beautiful shells.What a wonderful trip on the beach.
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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