Liners sail on regular routs and keep to a fixed timetable.（）A、班轮按照时间往返的。B、班轮按照时间表，往返于固定的航线上。C、班轮按照固定的航线往返的。D、班轮按照固定的时间表，往返于固定的航线上。
Liners sail on regular routs and keep to a fixed timetable.（）
- A、班轮按照时间往返的。
- B、班轮按照时间表，往返于固定的航线上。
- C、班轮按照固定的航线往返的。
- D、班轮按照固定的时间表，往返于固定的航线上。
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单选题Liners sail on regular routs and keep to a fixed timetable.（）A班轮按照时间往返的。B班轮按照时间表，往返于固定的航线上。C班轮按照固定的航线往返的。D班轮按照固定的时间表，往返于固定的航线上。
单选题One advantage of dry cylinder liners used in a diesel engine is the（）Alower thermal expansion rates than wet linersBgreater heat transfer rate than wet linersCgreater wear resistance than wet linersDprocedure to replace dry liners is simpler than for wet liners
单选题If cylinder liner wear is up to maximum limits the possibility of scavenge fires will not be materially reduced until the liners are （）.ApolishedBrenewedCadjustedDground
单选题Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?（）AThe chromium will not wear out the piston ringsBThe chromium strengthens the liners in the way of the scavenging air portsCChromium eliminates the need for oil scraper ringsDPores in the plating aid in maintaining the lube oil film
单选题The use of liners in riveted construction is eliminated by using（）.Alapped constructionBstrapped constructionCjoggled constructionDbelted construction
单选题Radar makes it possible and much safer for us to sail（）.Ain dense fogBin boisterous weatherCin the open seaDin rivers
单选题The lube oil to lubricate the surfaces of the cylinder liners is spread over by the （）.Asliding piston ringsBengines camshaftCsmall pumpsDforced feed system
单选题A capsized small sail vessel is best righted when what part of the vessel is downwind?（）ASternBBowCCenterboardDMast
单选题The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.Acorrect maneuveringBwearCworking efficiencyDmaintenance
单选题The cylinder covers and the liners are bolted together by means of studs （） the cylinder frames.Ascrewing intoBbeing screw onCto screw onDscrewed into
单选题The cylinder liners are made of （） and the cylinder surfaces are sometimes chromium-plated.AsteelBcopperCcast ironDstainless steel