请帮我用英语介绍下四川乐山....
题目
请帮我用英语介绍下四川乐山....
答案
Leshan is about 180km south to Chengdu and 20km west to Emeishan,located in the southwest area of Sichuan province.Leshan is a cultural city with a history of more than 3000 years and a mordern city a...
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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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