Logbooksareusedtorecordtheeventsoccurringwhen（）.
A. theshipisinaharbor
B. theshipisatanchorage
C. theshipisunderway
D. Alloftheabove
Lighterlongitudinalstiffeningframesonthevesselsidepatingarecalled（）.
A. stringers
B. sideframes
C. sidestiffeners
D. intercostals
国债负担率是指国债余额与当年GDP的比例。欧洲货币联盟定的这一比例为（）。
A. 40%
B. 50%
C. 60%
D. 25%
Leewayisthe（）.
A. differencebetweenthetruecourseandthecompasscourse
B. momentumofavesselafterherengineshavebeenstopped
C. lateralmovementofavesseldownwindofherintendedcourse
D. displaementofavesselmultipliedbyherspeed
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