在图19—8中，均衡的价格水平是________，同时均衡实际GDP是________万亿。
A. 110；11
B. 110；13
C. 100；12
D. 90；11
E. 90；13
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Crankcase explosions in propulsion diesel engines result from
A. the splashing of lubrication oil by the crankshaft
B. the dilution of crankcase oil with particles of combustion
C. broken fuel lines spraying oil on the crankcase
D. the ignition of unburned fuel and air in the crankcase
After installing a new hydraulic pump in a system, what special attention should be given
A. The relief valves in the system should be readjusted
B. The filters and strainers should be checked frequently
C. All system pressure should be readjusted
D. The system should be drained and renewed with a fluid of different operating characteristics
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