单项选择题
The hot expanding gas rotates the blades of the exhaust turbine, thus giving out large part of its power, which drives （）.
A.the oil separator
B.the fresh water generator
C.the compressor
D.fire pump
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The high pressure in fuel injection system of the diesel engine is produced by the （）.
A.injector pump
B.fuel injector
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A.crankcase
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