I often clean my room on the weekend.对划线部分提问
题目
I often clean my room on the weekend.对划线部分提问
答案
I often clean my room on the weekend.对划线部分提问(1) who often clean my room on the weekend (对主语提问）(2) When do you often clean your room （对时间状语提问）(3) What do you often clean on the we...
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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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