英语短文续写『急』
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英语短文续写『急』
Last Saturday,I was along the downtown area.I was keeping an eye on things.Suddenly...
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I heard someone calling my name.I turned around and found that it was Arthur,my former boyfriend.We hadn't seen each other for about 20 years.I looked at him for a second and then asked him where he h...
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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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