【名词&注释】
污染物(pollutants)、强制性(compulsory)、行政主管部门(executive branch)、海事管理机构(maritime administration)、主管机关(competent authorities)、交管部门
[单选题]For 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