A.should be correctly carried out
B.should correctly be taken place
C.should carried with care
D.must to carry out with great care
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A.a shortened ignition delay period
B.a lean fuel/air mixture
C.excess fuel in the combustion chamber
D.rapid vaporization of injected fuel droplets
A.too low starting air pressure
B.main starting valve closed
C.neither A nor B
D.A and B
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