用多只实验动物做实验而不用1只是因为如果只用1只做实验结果往往具有很大的 性不足以说明问题.计算全班各组的平均值是为了减小实验的 Template




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tomski用多只实验动物做实验而不用1只是因为如果只用1只做实验结果往往具有很大的 性不足以说明问题.计算全班各组的平均值是为了减小实验的 coloring