单选题 Although salt is now seen as harmful to health, it has been used for centuries as method of ______ foods.
  • A. maintaining
  • B. preserving
  • C. manufacturing
  • D. reserving
【正确答案】 B
【答案解析】[解析] preserve“保存”；maintain“保养；维持；维修”；manufacture“生产制作”；reserve“保留”。