调查木本植物种群密度时真正具有代表性的样本不一定需要 A.随机取样b.样方面积为1 m2c.样本数量足够大d.调查期无大量砍伐——青夏教育 Template




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tomski调查木本植物种群密度时真正具有代表性的样本不一定需要 a.随机取样b.样方面积为1 m2c.样本数量足够大d.调查期无大量砍伐——青夏教育 coloring