F．or the Wartsila 50DF, the complete combustion compared with the lean-combustion can decrease the following results ____ .①Exhaust temperatures ②NOx emissions ③Propeller efficiency ④Output ⑤Cylinder knocking ⑥Fuel supply

A．①②

B．③⑥

C．④

D．④⑤

[单选题]第一组： The Wartsila 50DF operates on the lean-bum principle: the mixture of air and gas in the cylinder has more air than is needed for complete combustion. Lean combustion reduces peak temperatures and therefore NOx emissions. Efficiency is increased

Wartsila DF系列低压双燃料发动机的起动模式包括---。①燃油起动模式②燃气起动模式③后备起动模式A. ①B. ①②C. ①③D. ①②③

[单选题]When we run a plastic comb through our( )the comb and the hair may have sta

[单选题]When the fuel oil is burning in the combustion chamber, it _____.A．gives up large amount of heatB．gives off large amount of heatC．gives up large amount of steamD．gives off large amount of steam

[单选题]When the fuel oil is burning in the combustion chamber, it （）.A . gives up large amount of heatB . gives off large amount of heatC . gives up large amount of steamD . gives off large amount of steam

[单选题]Which statement about diesel engine combustion is true?（）A . Combustion does not begin until the piston starts down on the power strokeB . Maximum combustion pressure is reached before TDCC . Turbulence in the cylinder causes a delay in ignitionD . M

[多选题] COMB单板支持哪些客户业务？（）A . GEB . STM-16C . STM-64D . E1

After reading it, you are required to complete the outline below it (numbered 46

[问答题] 程序图中1DF，2DF、3DF、DFI、DF2、DF3、DF4、DF5、DF7、DF8及DF9等符号的含义是什么？

completeA. 完成B. 竞争C. 完全地D. 比较