写一篇120词的英语演讲稿,什么主题都可以
题目
写一篇120词的英语演讲稿,什么主题都可以
答案
Good morning,everyone!The topic of my speech today is "The world in 100 years".It's really a very exciting to talk about,and in my opinion,the world will certainly become better.As computers are used ...
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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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