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该系统在遗传资源与生物多样性保护、水土保持、水源涵养、气候调节与适应、病虫草害控制、养分循环等方面的价值。基本要求是()
正确答案:至少具备上述两项功能且作用明显
Tag:
虫草
水土保持
养分
时间:2023-11-12 11:49:05
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实地调查方法中极其强调调查结束后的讨论、汇报,各组之间的信息要互通有无,力求克服专题间容易割裂的问题。属于()调查模式
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非遗调查采集原则有()
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