* 获取数字的第digit位（从右往左，0表示个位）
输入：prices = [8,4,6,2,3]。Line官方版本下载对此有专业解读
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Then Fayers' team will have to ask the environmental regulators for final approval.。safew官方下载对此有专业解读
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Democrats outraged at US military’s downing of CBP drone near Mexico border
· 朱文 · 来源：tutorial资讯