问答题

In measuring the migration of bisphenol A in food contact materials and products, oil-based food is extracted by methanol solution and then injected and use _____ to detect bisphenol A in food simulants.

答案: liquid chromatography-mass spectrometry/mass spectrometry##%...
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答案: A、客户的广泛性
B、项目的关联性
C、服务的目标性
D、无序的竞争性
正确答案:D、无序的竞争性
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