問題詳情
44. A significant contribution of intestinal bacteria to human nutrition is the benefit ofbacterial_________.
(A) production of vitamins A and C
(B) absorption of organic materials
(C) production of vitamin K
(D) recovery of water from fecal matter
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增