单选题Most fuel injection nozzles are opened by （）.Afuel oil pressureBa cam operated followerCa spring-loaded pressure plateDtiming gears keyed to the crankshaft
单选题
Most fuel injection nozzles are opened by （）.
A
fuel oil pressure
B
a cam operated follower
C
a spring-loaded pressure plate
D
timing gears keyed to the crankshaft
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相关考题：
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