(来学网)大豆的蛋白质含量是
  • A.
    (来学网)5%~10%
  • B.
    (来学网)15%~20%
  • C.
    (来学网)20%~30%
  • D.
    (来学网)35%~40%
  • E.
    (来学网)45%~50%