A:Look at the boys!Are they going canping?B:_,_ _.They are_ _.
题目
A:Look at the boys!Are they going canping?B:_,_ _.They are_ _.
答案
yes,they are.they are going to camping.
在这种情况下 they are 可以用两次.
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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