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简述电子皮带秤零点的漂移产生的因？
脊髓休克表现是损伤平面以下（）。
为了观察颈椎椎间孔情况时应摄取（）片。
In the process of communication requirement analysis, the project manager should consider the number of potential communication channels or paths as an indicator of the complexity of a project’s communication. According to Metcalfe’s Law, a project with 10 stakeholders has () potential communication channels.
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