單項(xiàng)選擇題

In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken off and the piston should be （）.

A.craned out
B.rolled out
C.lifted out
D.turned out

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單項(xiàng)選擇題

In order to increase the wearing resistance, the cylinder liner surfaces are sometimes （）.

A.aluminum-plated
B.bronze-plated
C.zinc-plated
D.chromium-plated

單項(xiàng)選擇題

In order to ensure the safety of the ship and its equipment during UMS operation, certain essential functions （）.

A.must be provided
B.may be provided
C.have provided
D.can be provided