幼儿英语简单的小故事
题目
幼儿英语简单的小故事
答案
海的女儿
The year after this, another sister became fifteen. She went up to the top of the sea. But the water was cold and there was much snow everywhere on the land. She soon came back. The five sisters were very happy when they went to the top of the sea to look at ships, cities, and men. But they did not remember these things for long. Their own home soon began to look more beautiful than anything which they saw at the top of the sea or on the land. The five sisters went up to the to……
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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