肠外营养液中,能促进维生素C氧化分解、降低维生素B活性的成分是 ()
A.锌
B.铜
C.磷
D.钾
E.钙
参考答案:B
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A.How is
B.How does
C.What does
D.What is
附子升压有效成分是()
A.栀子苷
B.去甲乌药碱
C.附子多糖
D.去甲猪毛菜碱
E.麻黄碱