A.用質(zhì)量份數(shù)B.用質(zhì)量百分?jǐn)?shù)C.以體積百分?jǐn)?shù)D.體積分?jǐn)?shù)
A.單因素與空白對照B.多因素與空白對照C.單因素與多因素
A.實用、廉價、高效B.實用、高效、經(jīng)濟(jì)C.實用、性能好、經(jīng)濟(jì)D.高效、經(jīng)濟(jì)、性能好