You could live without water for a few days.
题目
You could live without water for a few days.
We should save every frop of water.It is important.
There was no reply.
What do you mean by 'saving water'?
答案
You could live without water for a few days.
= If there were no water,you could live for a few days.
We should save every drop of water.It is important.
= It's important for you to save every drop of water.
There was no reply.
= Nobody replied.
= No one replied.
What do you mean by 'saving water'?
= What is the meaning of "saving water"?
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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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