未分类 · 2025年11月21日

(? ? ?)needs to be given at birth to prevent hemorrhagic disease(出血性疾病)?of some newborns. A.vitamin A B.vitamin K C.vitamin D D.vitamin C

(? ? ?)needs to be given at birth to prevent hemorrhagic disease(出血性疾病)?of some newborns. A.vitamin A B.vitamin K C.vitamin D D.vitamin C

正确答案:B