student named Tom is trying to save money from his summer job.In August,he earned$100 dy
题目
student named Tom is trying to save money from his summer job.In August,he earned$100 dy
答案
一个叫做Tom的学生正在努力在他的暑期工作中存钱.在8月份,他通过在一间餐馆洗碗赚得100美元.他把25%的钱存起来.
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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