写一篇关于运动与健康的英语作文(70词左右),
题目
写一篇关于运动与健康的英语作文(70词左右),
答案
As the up-to-dateness developed at a high speed,the phenomenon of the lack of physical work and athletic sports is becoming more and more serious.The changes of life style and working mode are a big threat to people's health.First of all,the metabolism of the people who lack of athletic sports will fall.And those people whose body always keeps still is equal to have a pack of cigarettes.If you want to be health and happily live a good life,please add a task of doing sports into your everyday life.
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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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