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【单选题】The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 in...
A.
is in favor of prohibiting passengers’ use of electronic devices completely
B.
has overestimated the danger of electromagnetic interference
C.
hasn’t formed his own opinion on this problem
D.
regards it as unreasonable to exercise a total ban during flight
【多选题】安全知识教育的内容主要是()。
A.
施工项目安全规章制度、安全技术操作规程
B.
施工生产流程;场内运输的有关安全知识
C.
有关施工用电的安全知识
D.
有关设备设施的安全知识
E.
有毒有害、民爆物品的有关安全知识