英语经典习题:将正确的句子改在横线上
题目
英语经典习题:将正确的句子改在横线上
1、He haven't got the key to the door.
__________________________________.
2、My mother doesn't has the ticket of the bus.
_______________________________________.
答案
He hasn't got the key to the door.
My mother doesn't have the ticket of the bus.
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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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