Zinc(鋅)isoneofabout20elements(元素)necessaryforgoodhealth...
問題詳情：Zinc(鋅)isoneofabout20elements(元素)necessaryforgoodhealth.Itispresentinthebodyinaverysmallamount,butitmakesitpossibleforimportantchemicalactionstobecarriedoutincells.Scientistsarejustbeginnin...