英语翻译
题目
英语翻译
A total of 30 women between the ages of 18 and 38 shared their experiences.Over half of the par-ticipants had multiple tattoos (57%) ranging from two to eight.Participants (90%) defined them-selves as Caucasian and were undergraduates (70%).More than half obtained their first tattooprior to turning 18 (10%) or on their 18th birthday (67%).1
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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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