During the inspection, the starting air valves should be closed （） the engine from turning.<br>A:to increase<br>B:to speed up<br>C:to prevent<br>D:to reduce

During the inspection, the starting air valves should be closed （） the engine from turning.
A:to increase
B:to speed up
C:to prevent
D:to reduce

出自：海船船员证

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