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单项选择题
A.not;but
B.neither;nor
C.either;or
D.not only;but also
单项选择题
A.atmosphere
B.the fresh water
C.compressed air
D.chemical compounds
单项选择题
A.fuel treatment
B.fuel combustion
C.fuel injection
D.fuel separating
单项选择题
A.bottle
B.injector
C.piston
D.barrel
单项选择题
A.a separate motor
B.a cam
C.a generator
D.a chain
单项选择题
A.has begun
B.takes place
C.occurs
D.happens
单项选择题
A.the cylinder head
B.the cross-head
C.the moving piston
D.the stationary piston
单项选择题
A.tank table
B.trim
C.water contents
D.oil pressure
单项选择题
A.alternator
B.turbo-charger
C.remote controller
D.windlass
单项选择题
A.suction
B.compression
C.expansion
D.exhaust