ground substance (基质)
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非生物物质 xenobiotic substances
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2、金属 - 腐殖物质络合物 metalhumic substances com
金属 - 腐殖物质络合物 metalhumic substances complexes
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3、Which of the substances listed is sati
Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）AImpuritiesBLube oilCGasolineDDiesel fuel
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4、Which of the substances listed is sati
Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）ACarbon particlesBLube oilCGasolineDDiesel fuel
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5、A vessel emitting harmful substances i
A vessel emitting harmful substances into the air or spilling oil into the sea is a（）.APolluterBEmitterCSpillerDOiler
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6、重组腐殖物质 humic substance in heavy fracti
重组腐殖物质 humic substance in heavy fraction