英语作文一场乒乓球比赛
题目
英语作文一场乒乓球比赛
答案
This afternoon,there is a table-tennis match between my classmates.Many of my classmates like playing table-tennis.So our teacher encourages us to play a game.There are four boy teams and three girl teams.Some other students are judges.The match is very exciting and finally all players get awards.But I think the happiness is the best reward.
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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