把一般疑问句改成特殊疑问句……
题目
把一般疑问句改成特殊疑问句……
I am going to have a long holiday.
Tim went to Australia yesterday.
对划线部分提问：
Kate and Bob were in Beijing “for two weeks.”
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答案
Are you going to have a long holiday?
Did tim go to Australia yesterday?
How long did Kate and Bob stay in Beijing
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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