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单选题
Deep-sea liners are（）.
A
ferries
B
passenger liners
C
cruise ships
D
ocean going vessels
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No. Public opinion remained divided over the issue.C
No. The reformists are more worried this time around.D
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单选题The underwater listening system was originally designed ______.A
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单选题Cylinder liners from older lower powered engines had a uniform wall thickness and the cooling was achieved by circulating cooling water through a space formed between （）.A
crown and skirtB
liner and jacketC
ring and grooveD
jacket and block
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单选题The cylinder covers and the liners are bolted together by means of studs （） the cylinder frames.A
screwing intoB
being screw onC
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screwed into
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glazed liners or pistonsB
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worn valve seats and valves
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单选题The cylinder liners are made of （） and the cylinder surfaces are sometimes chromium-plated.A
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