单选题Early injection timing is indicated by （）.Ahigh exhaust temperature and low firing pressureBhigh exhaust temperature and high firing pressureClow exhaust temperature and low firing pressureDlow exhaust temperature and high firing pressure
单选题
Early injection timing is indicated by （）.
A
high exhaust temperature and low firing pressure
B
high exhaust temperature and high firing pressure
C
low exhaust temperature and low firing pressure
D
low exhaust temperature and high firing pressure
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