【判断题】【消耗次数：1】
正常情况下，一次打电话的全部时间应当不超过3分钟，这就是打电话的“3分钟原则”
①
正确
②
错误
参考答案：
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【单选题】
计时观察法测得某工序工人工作时间：基本工作时间48分钟，辅助工作时间5分钟，准备与结束工作时间4分钟，休息时间3分钟，则定额时间是（ ）分钟
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