单选题The term “proper metering”, as applied to a diesel fuel injection system, can be best defined as （）.Adelivering the same quantity of fuel to each cylinder for each power stroke according to engine loadBmaintaining the metering adjustment for a reasonable period under all load conditionsCtiming fuel injection to obtain maximum power and good fuel economyDdistributing the fuel to all parts of the combustion chamber for proper combustion
单选题
The term “proper metering”, as applied to a diesel fuel injection system, can be best defined as （）.
A
delivering the same quantity of fuel to each cylinder for each power stroke according to engine load
B
maintaining the metering adjustment for a reasonable period under all load conditions
C
timing fuel injection to obtain maximum power and good fuel economy
D
distributing the fuel to all parts of the combustion chamber for proper combustion
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