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【多选题】
关于维生素Bl，以下描述中，正确的有（）A.
长期严重缺乏维生素Bl可致多发性神经炎
B.
长期缺乏维生素B可致口角炎
C.
长期缺乏维生素B1可导致脚气病
D.
维生素Bl缺乏可以导致脂溢性皮炎
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