单项选择题
When fuel is injected in a diesel engine cylinder too early, （）
A.ignition may be delayed
B.fuel economy is not affected
C.exhaust gas temperature will be unchanged
D.the exhaust will be clear
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A.reduce the turbocharger operating temperature
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单项选择题
Early fuel injection timing is indicated by the cylinder pressure being（）
A.above normal with a below normal exhaust temperature
B.above normal with a normal exhaust temperature
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