如果没有水会怎么样提几条节约用水的建议英语
题目
如果没有水会怎么样提几条节约用水的建议英语
答案
What will happen if there is no water?
1 turn off the tap after you finish using the water
2 reuse the water:use the same water to wash the face ,wash the clothes,and water the flowers.
3 use just enough water to drink
4 use the same water to clean the WC.
5 try to use the rainwater
6 try to use the riverwater.
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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