There are ( )days in aweek and ( )days in january.
题目
There are ( )days in aweek and ( )days in january.
( )is the first day of a week.
sichuan earthquake took place on the ( )of( )in 2008.
john is twenty years old.but he has only five birthdays.his birthday is on the ( )of( )
答案
There are (seven )days in aweek and ( thirty-one )days in january.(This) is the first day of a weeksichuan earthquake took place on the ( twenty-first (21st) )of( May )in 2008john i...
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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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