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当前学科:气瓶检查员考试
题目:
单选
加气操作人员在进行加气操作之前应确认()。
A . A、驾驶室内无人;
B . B、司机已关闭发动机,并已拉上汽车手刹;
C . C、驾驶室内有人;
D . D、车上没有载货.
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