单项选择题
A.2% B.4% C.5% D.10%
A.18% B.19% C.20% D.21%
A.3～4 B.4～5 C.5～6 D.6～7
A.液态蜜和结晶蜜 B.花卉蜜、甘露蜜 C.单花蜜和混合蜜 D.分离蜜、压榨蜜、巢蜜
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