题目内容

Theexternalcircumferenceofapairofmainbearingshellsisslightly()thatoftheboreofthehousingwhichreceivesthemWhatsthemeaningof“that”inthesentenceabove?

A. lessthan
B. lighterthan
C. largerthan
D. smallerthan

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气胀式救生筏充气所使用的气体应是()。

A. 有毒气体
B. 氨气
C. 二氧化碳和少部分氮气

ALLGEAR,SUCHASPILOTLADDER,ACCOMMODATIONLADDER,HOIST,ETC.,NECESSARYFORASAFETRANSFEROFTHEPILOTisknownas().

A. Riggins
B. Gears
C. Boardingarrangements
D. Fittings

TheexternalcircumferenceofapairofmainbearingshellsisslightlylargerthanthatoftheboreofthehousingwhichreceivesthemThedifferenceistermed().

A. nip
B. nap
C. gap
D. lip

救生筏应配备当筏充气时能()施放的海锚。

A. 自动布放
B. 人工布放
C. 混合布放

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