-胡萝I-素的效价相当于维生素A的(  )A.1/2 B.1/3 C.1/4 D.1/6 E.1/10

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问题 -胡萝I-素的效价相当于维生素A的(  )

选项 A.1/2
B.1/3
C.1/4
D.1/6
E.1/10

答案D

解析
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