如何用英语简单介绍一下秀水街
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如何用英语简单介绍一下秀水街
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On 19 March 2005,Beijing Silk Street High-rise,which draws lots of attentions,is open for business officially.After more than 20 years development,the two characters ”Xiu Shui” have become a famous ...
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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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