think and write(写一份暑假总结,不少于50个字)
题目
think and write(写一份暑假总结,不少于50个字)
答案
I had a busy and happy summer vacation.I finished doing my homework 10 days before the new term.I helped do some housework every day,such as,cleaning the house,cooking meals,washing dishes and so on.I went to climb the mountain and visited my grandparents.My parents and I went to Hainan and stayed there for a week.I learnt how to roller-skate.It was fun.
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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