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单选题
Vehicles（）only the simplest of the engine improvements that methanol makes feasible would still contribute to an immediate lessening of urban air pollution.
A
corporate
B
cooperating
C
operating
D
incorporating
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单选题Diesel engine control can be obtained by the bridge （）.A
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on a great extentC
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单选题In the two stroke diesel engine, it is designed so that the oil impingement is timed to proceed only on the piston ring belt during（）A
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both Ⅰ and Ⅱ are correctD
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单选题Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except（）A
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supply some CYL Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)C
put the fuel handle in the “stop” positionD
pump up the air bottle
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单选题Vehicles（）only the simplest of the engine improvements that methanol makes feasible would still contribute to an immediate lessening of urban air pollution.A
corporateB
cooperatingC
operatingD
incorporating
考题
单选题What is the “R. V.’s” used for in for the retired Americans?A
they are used as home when they are out.B
they are short form of recreational vehicles.C
they are the only home for the travelers.D
they are just transportation tools.
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