单项选择题

Which of the following conditions is realized by the turbo-charging of a previously naturally aspirated diesel engine?（）

A.Ignition lag increases
B.Lube oil system pressure increases
C.Brake specific fuel consumption increased
D.Mechanical efficiency increaded

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A.atop the piston crown
B.beneath the piston crown
C.at the base of the piston skirt
D.inside the cylinder liner cooling water jacket

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A.the ship security plan
B.the company security plan
C.the port security plan
D.the national security plan

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A.Inspector general
B.Captain of the port
C.local port authority
D.state pollution board