Ducklings can swim 一般疑问句 There are seven days in a
题目
Ducklings can swim 一般疑问句 There are seven days in a
Ducklings can swim 一般疑问句
There are seven days in a week 对seven提问
答案
Can Ducklings swim?
How many days are there in a week?
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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