下列实验或调查活动中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部分标志物脱落b.标志重捕法调查田鼠种群密度时 Template




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tomski下列实验或调查活动中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部分标志物脱落b.标志重捕法调查田鼠种群密度时 coloring