she has a book改变成单数,复数 一般疑问句和肯定句
题目
she has a book改变成单数,复数 一般疑问句和肯定句
答案
she has a book.
she has some books.
Does she have a book?
Yes,she does.
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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