It is in Paris,the capitai of France.It has 1652 steps to the top of the tower and it took twenty-
题目
It is in Paris,the capitai of France.It has 1652 steps to the top of the tower and it took twenty-
tow years to build it.
答案
它（塔）位于法国首都巴黎,有1652阶楼梯通向塔顶.这座塔花了二十二年的时间才建成.
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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