When restarting a heavy fuel diesel engine that has been stopped for some time, the engine
A. increase the starting air pressure
B. use a higher than normal cranking speed
C. increase the fuel injection pressure
D. use a fuel having a lower ignition temperature
《铁路客运运价规则》规定,托运警犬、猎犬,每头按最小重量()计算,超重时按实际重量计算。
A. 50kg
B. 20kg
C. 40kg
D. 25kg
作为极端降水的危险度指标,核电厂寿期内的()小时期望极端值及其置信区间必须确定。
A. 1
B. 2
C. 12
D. 24
非晶砸FPD的优点不包括
A. 成像环节少
B. 吸收率高
C. 灵敏度高
D. 量子检出效率高
E. 无电离辐射