试题与答案

一般正常情况下，比较清洁的水体中分布的底栖动物种类多、个体数量相对少，污染水体（严重

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题型：判断题

题目：

一般正常情况下，比较清洁的水体中分布的底栖动物种类多、个体数量相对少，污染水体（严重污染除外）中分布的底栖动物种类少、个体数量相对多。

答案：

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