I have no pens ___.Could you please lend me one?
题目
I have no pens ___.Could you please lend me one?
-Sure.Here you are.
A:to write B:to write down C:to write D:to write in
How do you know that she likes singing?
-She is often heard ___ after class.
A:sang B:to sing C:sing D:sings 选什么 为什么?
答案
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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