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