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老師,標(biāo)好的兩個(gè)數(shù)怎么來的
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同學(xué),你好
這是A和B各自的標(biāo)準(zhǔn)差
2023 07/07 11:50
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2023 07/07 11:50
稍等我給你寫過程
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文靜老師 
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2023 07/07 13:49
同學(xué),請看圖片解析
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老師,標(biāo)好的兩個(gè)數(shù)怎么來的