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单选题
An after-cooler installed between the turbocharger and the cylinder air inlet （）
A
increases the density of the air
B
decrease the density of the air
C
increases the specific heat of the air
D
decreases the specific heat of the exhaust
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单选题What is the function of the after-cooler installed in the diesel engine air intakes system?（）A
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Increase the exhaust temperatureC
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