单项选择题
A.6%B.8%C.12%D.16%
A.16%B.18%C.20%D.28%
A.10kg羔羊料+20kg健康羊伴侣+20kg浓缩料+80kg 888B.10kg羔羊料+20kg健康羊伴侣+20kg精补料+80kg 888C.1袋羔羊料+2袋健康伴侣+2袋育肥浓缩料+8袋888D.1袋羔羊料+2袋健康伴侣+2袋育肥精补料+8袋888