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多选题
55、按下电源开关键机器无反应,通常检查需( )。
A
机器通道两侧及操作键盘上三个紧急断点按钮是否处于断开状态
B
机器所有电源插头和接口是否连接正确
C
稳压电源或不间断电源开关是否开启
D
显示器开关是否打开
答案解析
正确答案：ABC
相关知识点：
机器无反应检查，断点插头电源等
题目纠错
安检四级技能鉴定
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