51.One variety of partially biode gradable plasticb everage containe rismanu facture dfrom small bits of plastic boundtogetherbyadegradablebondingagentsuchascornstarch.Sinceonlythebondingagentdegrades, leavingthesmallbitsofplastic,nolessplasticrefusepercontainerisproducedwhensuchcontainersare discardedthanwhencomparablenonbiodegradablecontainersarediscarded.
Whichofthefollowing,iftrue,moststrengthenstheargumentabove?
(A)Bothpartiallybiodegradableandnonbiodegradableplasticbeveragecontainerscanbecrushed completelyflatbyrefusecompactors.
(B)Thepartiallybiodegradableplasticbeveragecontainersaremadewithmoreplasticthancomparable nonbiodegradableonesinordertocompensatefortheweakeningeffectofthebondingagents.
(C)Manyconsumersareecology-mindedandprefertobuyaproductsoldinthepartiallybiodegradable plasticbeveragecontainersratherthaninnonbiodegradablecontainers,evenifthepriceishigher.
(D)Themanufacturingprocessforthepartiallybiodegradableplasticbeveragecontainersresultsinless plasticwastethanthemanufacturingprocessfornonbiodegradableplasticbeveragecontainers.
(E)Technologicalproblemswithrecyclingcurrentlypreventthereuseasfoodorbeveragecontainersofthe plasticfromeithertypeofplasticbeveragecontainer.
不太理解B的tocompensatefortheweakeningeffectofthebondingagents 的意思,这个有什么密切关联呢?
我想法 A=X+bonding agent ,X ---> X' & B = Y , Y --->Y' , X' ≥ Y' ---> X ≥Y (这里 A : Bio-- container B : Non bio --- container X = Y: plastic X' = Y': plastic refuse ) |