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【多选题】
分小组学习操作机床时,操作者和组员的做法正确的是()
A.
小组中只有操作者操作机床，其他组员不予辅助操作；
B.
小组中只有操作者操作机床，出现问题时，先停车，组员之间再讨论出现问题的原因；
C.
小组中只有操作者操作机床，其他组员必须和机床保持一定的安全距离，不得操作机床；
D.
小组中只有操作者操作机床，但机床出现异常或者发生事故时时，其他组员可以立即按下急停按钮。
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相关题目：
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