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单选题
How should you warm up a diesel engine that has not been run for some time? （）
A
Run it at minimum speed for a period of time
B
Run it at half speed for a period of time
C
Bring it to top speed immediately
D
Inject ether into the air intake
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How should you warm up a diesel engine that has not been run for some time?______.A.Run it at minimum speed for a period of timeB.Run it at half speed for a period of timeC.Bring it to top speed immediatelyD.Inject ether into the air intake
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