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【单选题】
在测定生物样品中的农药、石油类、苯并（a）芘等有机污染物质时，一般用什么方法提取。
A.
振荡浸提取
B.
组织捣碎提取
C.
直接球磨提取
D.
提取器或脂肪提取器提取
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transferred
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C.
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B.
组织结构图
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D.
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