单项选择题
A.delivering more air into the cylinder than it would normally receive during an ordinary charging process
B.forcing the products of combustion out of the cylinder with the fresh air charge
C.collecting the air charge at the cleaner
D.combustion and expansion of hot gas
单项选择题 A diesel generator has just been paralleled with an AC turbo-generator, but the load can not be properly divided.This could be caused by（）
单项选择题 The process of scavenging a two-stroke/cycle diesel engine serves to（）
单项选择题 Which of the listed bearing types is an example of a solid bearing?（）