【判断题】【消耗次数：1】
对塔身升降的基本要求是升降作业过程中，必须有专人指挥，必须有专人照看电源，必须有专人操作液压系统，必须有专人拆装螺栓，必须服从指挥信号
①
正确
②
错误
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must have done
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to escape
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