急求以《To Be A Volunteer》为题的80词初中英语作文!
题目
急求以《To Be A Volunteer》为题的80词初中英语作文!
答案
To Be A Volunteer
Last Sunday,we volunteered to help the Xinguang Park.In the early morning,we gathered at school gate,and then we went there by bike.When we got there,we saw a lot of plastic bags,peels and much other litter in the park.We helped to pick up the litter and put it into litterbins,we had to run here and there to pick up the litter.After a while ,all of us felt very tired.After around two hours' hard work ,the park became clean once more.Though we looked much too dirty,we felt very happy.
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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