用is或are填充.There_some girls under the tree.There____not any students in the classroom now .
题目
用is或are填充.There_some girls under the tree.There____not any students in the classroom now .
答案
There are some girls under the tree.There is not any students in the classroom now .
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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