【单选题】【消耗次数：1】
生物化学研究的基础阶段是
①
静态生物化学阶段
②
动态生物化学阶段
③
机能生物化学阶段
④
结构生物化学阶段
⑤
以上都不是
参考答案：
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（ ）是指生物有机质在微生物作用下，通过生物化学反应，最终形成一种类似腐殖质的过程。产物可用作肥料或土壤改良剂。
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A.填埋
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