木薯（Manihot esculenta Crantz）是世界上三大薯类作物（马铃薯、番薯、木薯）之一,木薯块根淀粉含量丰富,可磨木薯粉做面包食用,也是饲......

English whether being used as a lingua franca or as an international language,the tendency of English development does n......