People will have some easy jobs to do in the future,because___________________________
题目
People will have some easy jobs to do in the future,because___________________________
Working hours will be short in the future,because____________________________________
There wil be _______(more/less)heavy rain in the future,because_______________________
答案
1the difficult jobs will be complished by computers and robots.2people can use the high-tech machine to finish job which resulting in the decrease of working hours.3less the temperature is will be so ...
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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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