下列调查活动或实验中计算所得数值与实际数值相比可能偏小的是 A.标志重捕法调查灰喜鹊种群密度时标志物脱落 b.样方法调查蒲公英种群 Template




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tomski下列调查活动或实验中计算所得数值与实际数值相比可能偏小的是 a.标志重捕法调查灰喜鹊种群密度时标志物脱落 b.样方法调查蒲公英种群 coloring