A.400μg DFE/天B.600μg DFE/天C.800μg DFE/天D.1000μg DFE/天
A.50mgB.75mgC.100mgD.200mg
A.參與視網(wǎng)膜的光化學(xué)反應(yīng)B.促進(jìn)小腸黏膜對(duì)鈣的吸收C.促進(jìn)骨組織的鈣化D.促進(jìn)腎小管對(duì)鈣、磷的重吸收