how to live a happy life
题目
how to live a happy life
答案
Every one dreams to live happily.But different peoples have different opinions about happiness.How to live a happy life?It's the same to everyboday.First,you need to eat a balanced diet and do exercises more than three times a week.It can help you keep healthy.Second,you will feel happily when you share nice things with each other and help somebody out.It also can let you make more friends.If you are energy enough,you can be a volunteer.It must be nice and unforgettable.Last,having a nice dream and work hard for it is important,too.Don't stressed out or be under pressure.It'll make you have a bad mood.
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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