The rules require that a stand-on vessel SHALL take action to avoid collision when she determines that().
A. risk of collision exists
B. the other vessel will cross ahead of her
C. the other vessel is not taking appropriate action
D. collision cannot be avoided by the give-way vessel's maneuver alone
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运用收益现值法进行资产评估时,收益额就是指评估基准日资产的收益。
A. 正确
B. 错误
当采高超过()或片帮严重时,液压支架必须有护帮板,防止片帮伤人。
A. 2.5米;
B. 3米;
C. 3.5米;
企业不必对作业环境、安全设施及生产系统进行巡回检查,隐患未消除不得组织生产。
A. 正确
B. 错误