题目内容
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[单选题]
Chitosan is a linear polysaccharide composed of randomly distributed units.
A.D-mannuronic
B.N-acetyl-D-glucosamine
C.D-glucose
D.D-glucosamine
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发布时间：2022-01-07
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A、Lactose
B、Maltose
C、Glucose
D、Starch
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