Inpluggingsubmergedholesonavessel,rags,wedges,andothermaterialsshouldbeusedinconjunctionwithplugsto().
A. reducethewaterpressureonthehull
B. reducethewaterleakingaroundtheplugs
C. preventprogressiveflooding
D. reducethepossibilityofstressfractures
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()年,解放军思想宣传队和工人宣传队离开了太原工学院。
A. 1975
B. 1976
C. 1974
D. 1973
1968年,中央发出了()的通知。
A. 大学要复课闹革命
B. 中学要复课闹革命
C. 小学要复课闹革命
D. 大、中、小学要复课闹革命
LinesorgearNOTinuseshouldbe().
A. conspicuouslymarked
B. stowedanywhere
C. leftondeck
D. securedorstowedoutoftheway
Oncargobooms,preventersare().
A. auxiliaryguys
B. extrafairleads
C. steelbands
D. stops