We()(have)a school Sports Day last week.All the students()(do)a good job.We()(are)in second place.We
题目
We()(have)a school Sports Day last week.All the students()(do)a good job.We()(are)in second place.We()(win)5 gold medals and 7 silver gold medals.Mary()(is)in the 100m race.She()(run)fast and she()(get )to the finish line first.Tim()(is)in the800m race.
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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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