下列哪项不是威胁生物多样性的原因 A.乱捕滥杀乱砍滥伐b.外来物种的入侵c.同种生物之间的竞争d.水体和大气污染 题目和参考答案——青夏 Template




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tomski下列哪项不是威胁生物多样性的原因 a.乱捕滥杀乱砍滥伐b.外来物种的入侵c.同种生物之间的竞争d.水体和大气污染 题目和参考答案——青夏 coloring