【单选题】A decrease in the flash point of diesel engine lube oil indicates the lube oil has become _____.
A.
contaminated with sludge
B.
contaminated with carbon
【判断题】肿瘤的的原因主要是遗传和环境因素,与生活方式无关。()
【单选题】Demulsibility of a lube oil is defined as _____.
A.
the ability of oil to separate from water
B.
the temperature at which oil flows rapidly
C.
a measure of the water in a lube oil system
D.
an emulsion of different grades of oil
【单选题】单纯性循环性缺氧患者进行氧疗的主要目的是:( )
【判断题】只要地面足够清洁,原料药可以直接放在地面上。
【单选题】A dirty lube oil strainer can result in()
B.
low lube oil temperature
C.
excessive oil consumption
D.
low bearing oil pressure
【判断题】肿瘤的的原因主要是遗传和环境因素,与生活方式无关。
【单选题】单纯性循环性缺氧患者进行氧疗的主要目的是( )