A.煙氣 B.氯氣 C.苯 D.CO
A.細菌總數(shù)與金黃色葡萄球菌總數(shù) B.細菌總數(shù)與鏈球菌總數(shù) C.鏈球菌總數(shù)與金黃色葡萄球菌總數(shù) D.鏈球菌總數(shù)與真菌總數(shù)
A.SO2 B.CO C.CO2 D.甲醛