单项选择题

The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.

A.be affected
B.affect
C.be effected
D.effect

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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.

A.look for
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C.consult
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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 （）

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