用There are造5个句子
题目
用There are造5个句子
答案
There are many books in the library.There are some sheep on the hill.There are three people in his family.There are four lessons in the morning.There are some pictures on the wall .
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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