单选题The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）Agreater than the average exhaust manifold pressureBless than the average exhaust manifold pressureCgreater at the turbine wheel than at the impellerDgreater at reduced engine speed
单选题
The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually（）
A
greater than the average exhaust manifold pressure
B
less than the average exhaust manifold pressure
C
greater at the turbine wheel than at the impeller
D
greater at reduced engine speed
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