有关节约用水的英语作文
题目
有关节约用水的英语作文
在我们生活中,水是非常重要的.但是我们经常可以看到浪费水的现象.请你写一封倡议书,倡议大家一起来节约用水（至少5条建议）
要求：1.词数80个左右
Let all of us save water
答案
As we all know,water is very important to us.We can't live without water.We need to drink water everyday and the food we eat needs water too.We should face that water is badly polluted.We need to pay attention that water is wasted seriously.So,what we should do now is saving water and protecting the water.
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．
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