By definition,a“spar deck”s the ().
A. lower most continuous deck not broken by water tight bulkheads
B. after most weather deck above the main strength deck
C. upper or weather deck above the main strength deck
D. deck of light construction below the main or strength deck
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核设施和辐射设施退役活动直接操纵切割机具的工作人员,需穿防火焰工作服。个人剂量监测常用(),必要时要戴()。
A. 热释光剂量计和中子剂量计带报警的电子剂量计和趾端剂量计
B. 带报警的电子剂量计和趾端剂量计热释光剂量计和中子剂量计
C. 热释光剂量计和带报警的电子剂量计中子剂量计和趾端剂量计
D. 中子剂量计和趾端剂量计热释光剂量计和带报警的电子剂量
机组固定式氧气瓶,温度为(21℃)时,供氧系统的正常压力:
A. 1595psi
B. 1800psi
C. 1850psi
D. 1950psi
The highest level of commercial navigational accuracy is provided by ().
A. DGPS,within a coverage area
B. SPS,without selective availability
C. PPS,without selective availability
D. NAVSAT,using the Doppler-shift
()是调节管道胀缩与阀门拆卸和检修方便的设备,常安在阀门的下侧。
A. 过滤器
B. 补偿器
C. 压力计
D. 流量计