英语 单复数转换：
题目
英语 单复数转换：
1 Is that a photo?
2 Is it a pencil sharpener?
3 Are those his friends?
4 Are they Tom's daughters?
答案
1 Are those photos?
2 Are they pencil sharpeners?
3 Is that his friends?
4 Is she Tom's daughter?
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
最新试题
热门考点