用was were造疑问句,肯定句,否定句
题目
用was were造疑问句,肯定句,否定句
答案
肯定句：He was the tallest boy in the class.There were a lot of flowers in the garden last week.否定句：I was in Beijing yesterday.We were at home an hour ago.一般疑问句：Was she your teacher?Yes,she ...
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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