英语翻译
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英语翻译
原文语境供参考：
Any apps submitted outside this time frame are not eligible for this Reward program.Only those apps that have been approved through BlackBerry World and RIM will be considered towards a Reward.No purchase necessary to be eligible for the draw.The odds of winning the draw depend on the number of eligible Vendors entered.Skill-testing question applies to Canadian residents.Cash rewards limited to 20 per Vendor.See the Official Terms and Conditions for complete details
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对于抽签,不必通过购买来成为有资格的.
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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