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單項(xiàng)選擇題

Piston cooling fins are located（）

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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單項(xiàng)選擇題

The ship security assessment is an essential and integral part of the process of developing and updating（）

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

單項(xiàng)選擇題

If a vessel moored at a U-Sterminal does not comply with coast guard pollution prevention regulation, it may be detained by the （）

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

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