I am thirteen years old (改为一般疑问句)
题目
I am thirteen years old (改为一般疑问句)
These are my grandfather and grandmother(写出同义词)He is an English teacher (改为复数句)
答案
1. Are you thirteen years old?
2. They are my grandparents.
3. They are English teachers.
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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