(来学网)为预防胎儿神经管炎,建议准备怀孕的妇女服用叶酸的剂量是
  • A.
    (来学网)0.1mg/d
  • B.
    (来学网)0.2mg/d
  • C.
    (来学网)0.3mg/d
  • D.
    (来学网)0.4mg/d
  • E.
    (来学网)0.5mg/d