同类词 1.I live on the second floor with my parents.Spring is the ________ season of a year.
题目
同类词 1.I live on the second floor with my parents.Spring is the ________ season of a year.
Tuesday is the _________ day of a week.September is the ________ month of a year.Jim’s birthday is on Christmas Day.It’s on December the _________.
4.I don’t live with my parents.I visit them once a week or __________ a month.
答案
second
ninth
twenty-fifth
four times
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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