the earth is becoming warmer-but does it matter
题目
the earth is becoming warmer-but does it matter
英语选修六unit4的课文,我想要他30字的概括···谢谢各位大神
http://zhidao.baidu.com/question/224009469.html
这里有原文.
答案
scientists subscribe to the view that the reason why the earth is becoming warmer is due to the carbon dioxide, but they have different attitude towards this rise.
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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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