单项选择题
A.faster than dead slow speed B.slower than dead slow speed C.with the output of MCR D.at critical speeds
To counteract these undesirable effects cylinder oils u...
单项选择题To counteract these undesirable effects cylinder oils usually contain additives formulated to impart a high degree of （） and detergency.
A.salinity B.alkalinity C.acid D.sanitary
To avoid scavenge fires occurring the engine timing and...
单项选择题To avoid scavenge fires occurring the engine timing and equipment maintenance （）.
A.should be correctly carried out B.should correctly be taken place C.should carded with care D.must to carry out with great care
To avoid scavenge fires （） the engine timing and equipm...
单项选择题To avoid scavenge fires （） the engine timing and equipment maintenance should be correctly carried out.
A.occurred B.occurring C.not happening D.occur
