题目

已知数据 , ,…, 的平均数是3,方差是3,则数据 , , ,…, 的平均数是,方差是. 答案:【1】6【2】3 -Will you give this message to Mr.White, please? -Sorry, I can’t.He ________. [  ] A.doesn’t any more work here. B.doesn’t any longer here work. C.doesn’t work any more here. D.doesn’t work here any longer.
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