单项选择题
A.has much to do with the operation of the engine and its life
B.have much to do with the operation of the engine and its life
C.has much doing with the operation of the engine and its life
D.have much doing with the operation of the engine and its life
单项选择题 The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.
单项选择题 If you don’t understand the meaning of the technical terms of the diesel engine, you can （） the dictionary of machine technology.
单项选择题 The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）