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【多选题】
糖元[(C 6 H 10 O 5 ) n ]是一种相对分子质量比淀粉更大的多糖，主要存在于肝脏和肌肉中，常常称为动物淀粉，下列有关糖元的叙述正确的是 [     ]
A.
糖元与纤维素互为同分异构体，与淀粉互为同系物
B.
糖元水解的最终产物是葡萄糖
C.
糖元具有还原性，是还原性糖
D.
糖元无甜味
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