【单选题】【消耗次数：1】
在运输问题中，调整对象的确定应选择？
①
检验数为负
②
检验数为正
③
检验数为负且绝对值最大
④
检验数为负且绝对值最小
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两样本均数比较的t检验中，结果为P0.05，有统计意义。P愈小则（ ）
①
说明两样本均数差别愈大
②
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