单选题 Among the following, which one is not internal combustion engine?

单选题 Large, low-speed, two-stroke marine diesel engines are directly coupled to propeller and do not require a______

单选题 Since most medium-speed diesel engines are non-reversible, ______ is usually used to cater for astern thrust.

单选题 The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the______

单选题 The low speed diesel engines are tall to allow for long strokes which improve engine______

单选题 Since the burning or combustion takes place within the engine itself, the engine is known as______

单选题 If a diesel engine operates at about 700 r/ min, the engine should be______

单选题 Since most medium-speed diesel engines are non-reversible, ______is usually used to cater for astern thrust.

单选题 Large, low speed, two-stroke marine diesel engines offer the advantages of the following except______