The children there are being put in danger every day because many care workers still do not know ho
题目
The children there are being put in danger every day because many care workers still do not know ho
答案
那儿的孩子现在每天都处于危险中因为很多保障人员还不知道...
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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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