单项选择题
A.15% B.20% C.25% D.30% E.40%
A.脑 B.心脏 C.骨骼肌 D.肾 E.肝
A.800~1100g B.1200~1500g C.1000~1500g D.2000~2400g E.2500~3000g
A.Ⅱ B.Ⅶ C.Ⅸ D.Ⅴ E.Ⅹ
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