Because the castings of smaller engines are not so big and heavy, （） and cylinder block may be made in one piece.

[单选题]Smaller engines can be made more rigid than large ones and may not have （）.A . connecting rodsB . crankshaftC . crankcaseD . through bolt

The diesel engines have played an important role in the shipping industry becaus

This restaurant is very popular because it has some separate, smaller rooms ____

[单选题]_____ the engines, the diesel engine is ____ used engine on boardA．Between / more commonlyB．Among / the most commonlyC．Between / not more commonlyD．Among / not the most commonly

[单选题]The experiment showed that the smaller fish .A． fought over a feast B. went on diet willinglyC． preferred some extra food D. challenged the boss fish

[单选题]The search engines work by means of _________.A． arranging links to the InternetB． submitting specific search termC． updating a knowledge databaseD． searching engine spiders

[单选题]D．iesel engines are started by supplying into the cylinders in the appropriate sequence for the required direction.A．cooling waterB．compressing airC．compressed airD．cylinder oil

[单选题]All diesel engines are classified as（）.A . four cycleB . compression ignitionC . vacuum ignitionD . external combustio

[单选题]For most ship engines，the fuel is（）.A . natural gasB . diesel oilC . propaneD . bunker fuel

[单选题]In diesel engines designed with a crosshead, the motion of the piston rod can be described as （）.A . reciprocating at the piston pin, rotary at the crank pinB . reciprocating at the crank pin, rotary at the piston pinC . straight reciprocationD . str