A.0.988/0.991 B.0.991/0.988 C.0.891/0.918 D.0.918/0.988
A.材料問(wèn)題、自然磨損、污損、操作問(wèn)題 B.污損、材料問(wèn)題、自然磨損、操作問(wèn)題 C.材料問(wèn)題、污損、操作問(wèn)題、自然磨損 D.自然磨損、材料問(wèn)題、污損、操作問(wèn)題
A.柴油發(fā)電機(jī)/重點(diǎn)研究對(duì)象 B.柴油發(fā)電機(jī)/最薄弱的環(huán)節(jié) C.主機(jī)/最薄弱的環(huán)節(jié) D.機(jī)艙輔助機(jī)械/重點(diǎn)研究對(duì)象