单项选择题
A.50% B.52.0% C.56.0% D.58.0%
A.56.0% B.58.0% C.60.0% D.50.0%
A.2.0% B.3.0% C.5.0% D.8.0%
A.水分 B.直链淀粉 C.垩白度 D.杂质含量
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