- 問題詳情:CHEMICALVERSUSORGANICFARMINGChemicalpesticidesandartificialfertilisers________________(spread)useinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthem____________agreatwaytofightcropdiseaseandincreaseprod...
- 7685