there are few means of circulating the printed word in large countries with scattered populations an
题目
there are few means of circulating the printed word in large countries with scattered populations and undeveloped communications.
的意思
答案
在大国的一些分散人口和不发达的通讯地区,几乎没有循环使用印刷文字的方法
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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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