2012年地球会怎么样?我们该怎么保护?
题目
2012年地球会怎么样?我们该怎么保护?
最好是中、英文的.
答案
What do you expect it to be,the horizon rises up,the water is all over the planet,the specieses are extinct by then...
There is something we can do now to get us out of the mess like what is going on in the movie [2012].First of all,we make much more money,just in case that the earth indeed is going to be ruined.Second of all,we don't make so much pollution as the people do.So to sum up,we should live neatly,meaningfully and long.
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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