单项选择题
A.0.5ppmB.1ppmC.2ppmD.5ppm
A.10ppbB.5ppbC.20ppbD.30ppb
A.0.05ppmB.0.15ppmC.0.25ppmD.0.5ppm
A.《饲料标签》B.《饲料卫生标准》C.《饲料检测结果判定的允许误差》D.《饲料原料目录》
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