新概念英语第二册第三课摘要写作答案
题目
新概念英语第二册第三课摘要写作答案
答案
Postcards always spoil the writer's holidays.He spent his holidays in Italy last summer.He thought about postcards every day.He did not send any cards to his friends.He bought thirty-seven cards on th...
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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