把下列句子改为否定句 My CDs are in the drawer
题目
把下列句子改为否定句 My CDs are in the drawer
My CDs are in the drawer
she plays sports every day
答案
My CDs are in the drawer.
否定：My CDs are not in the drawer.
She plays sports every day.
否定：She does not play sports every day.
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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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