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【单选题】
下列关于膜剂概述叙述错误的是（ ）A.
膜剂系指药物与适宜成膜材料经加工成的薄膜制剂
B.
根据膜剂的结构类型分类，有单层膜、多层膜(复合)与夹心膜等
C.
膜剂成膜材料用量小，含量准确
D.
吸收起效快
E.
载药量大、适合于大剂量的药物
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