单选题Increased air （） will raise scavenge efficiency and allow a greater mass of air to be compressed； more fuel may now be burned giving an increased power.Aspecific volumeBdensityCviscosityDcalorific value
单选题
Increased air （） will raise scavenge efficiency and allow a greater mass of air to be compressed； more fuel may now be burned giving an increased power.
A
specific volume
B
density
C
viscosity
D
calorific value
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