(来学网)正氮平衡的关系式是
  • A.
    (来学网)摄入氮=尿氮+粪氮
  • B.
    (来学网)摄入氮>尿氮+粪氮
  • C.
    (来学网)摄入氮=粪氮
  • D.
    (来学网)摄入氮=尿氮
  • E.
    (来学网)摄入氮<尿氮+粪氮