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单项选择题

A.维生素D3B.25-(OH)-D3C.24,25-(OH)2-D3D.1,24,25-(OH)3-D3E.……

A1/A2型题维生素D的活性形式是()

A.维生素D3
B.25-(OH)-D3
C.24,25-(OH)2-D3
D.1,24,25-(OH)3-D3
E.1,25-(OH)2-D3

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