【简答题】What can be used to handle an oil spill?
【简答题】What can be used to clean up spilt oil in the of an oil spill?
【简答题】Crude oil must be and then can be used.
【判断题】一般变速器中的常啮合齿轮都采用直齿齿轮传动。
【单选题】Satellite tracking and remote communication systems can be used to
A.
reduce oil consumption.
B.
remove the obstacles on the road.
C.
call for help when one's car crashes.
D.
help drivers get out of a traffic jam.
【单选题】天然气液化工厂为保证连续稳定运行,预处理后的天然气水含量应小于( )m³/m³。
【单选题】A lube oil filter can be used to remove most contaminants from lube oil. A contaminant which will remain in the lube oil after filtering is ____.