【单选题】
A <{p}><{font _mstmutation="1" _msttexthash="11081889" _msthash="5345"}>.维生素B12<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msttexthash="9839206" _msthash="5346"}>维生素B2<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msttexthash="9839778" _msthash="5347"}>维生素B6<{/font}><{br/}><{/p}>
D <{p}><{font _mstmutation="1" _msttexthash="9832316" _msthash="5348"}>维生素D<{/font}><{br/}><{/p}>
E <{p}><{font _mstmutation="1" _msttexthash="9832446" _msthash="5349"}>维生素E<{/font}><{br/}><{/p}>
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