单项选择题
A.限制性氨基酸 B.第一限制氨基酸糖 C.乳糖 D.淀粉
A.18 B.20 C.9 D.21
A.12% B.14% C.16% D.15%
A.50%~55% B.60%~70% C.65%~75% D.55%~65%
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