变一般疑问句(注意过去式)
题目
变一般疑问句(注意过去式)
l brought young trees.
They played computer games.
My father found a secred.
l saw many trees.
答案
1 Did you bring young trees?
2 Did they play computer games?
3 Did your father find a secred?
4 Did you see many trees?
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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