Fuel has been injected but ignition fails The possible cause may be （）.<br>A:leaky exhaust valve<br>B:increased scavenging air temperature<br>C:engine cylinders not scavenged sufficiently<br>D:water in the fuel oil

Fuel has been injected but ignition fails The possible cause may be （）.
A:leaky exhaust valve
B:increased scavenging air temperature
C:engine cylinders not scavenged sufficiently
D:water in the fuel oil

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