求一篇how to protect the earth的英语作文
题目
求一篇how to protect the earth的英语作文
要200字
答案
It does not take a genius to realize what is happening in the environment.Animal species are becoming extinct.The rainforests are slowly being destroyed.The air quality is getting worse.The hurricanes...
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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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