单项选择题
A.24mg/d B.34mg/d C.30mg/d D.20mg/d E.100mg/d
A.1200mg/d B.1500mg/d C.1800mg/d D.2000mg/d E.2200mg/d
A.1200mg/d B.1000mg/d C.800mg/d D.700mg/d E.600mg/d
A.600mg/d B.800mg/d C.1000mg/d D.1200mg/d E.1500mg/d
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