单项选择题

Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.

A.fuel oil
B.diesel oil
C.compressed air
D.jacket water

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单项选择题
Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.

A.cooling water
B.compressing air
C.compressed air
D.cylinder oil
单项选择题
Cylinders of marine diesel engines are normally cooled by （）.

A.sea water
B.fine mineral oil
C.sanitary water
D.fresh water
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