单项选择题
A.肾结石 B.贫血 C.脚气病 D.佝偻病 E.癞皮病
A.50pμg/d B.50mg/d C.150mg/d D.100mg/d E.100μg/d
A.20mg/d B.24mg/d C.30mg/d D.34mg/d E.100mg/d
A.牛奶 B.鸡蛋黄 C.鸡肉 D.蔬菜 E.黑豆
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