单选题:就动作的结构而言,操作活动的每个动作必须切实执行,不能合并、省略,因此,操作技能在结构上具有(  )

题目内容:
就动作的结构而言,操作活动的每个动作必须切实执行,不能合并、省略,因此,操作技能在结构上具有(  ) A.简缩性
B.客观性
C.外显性
D.展开性
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