【单选题】The purpose of an oil mist detector in a main propulsion diesel engine is to warn of __________.
A.
excessive mist density in the crankcases
B.
excessively high crankcase vacuum
C.
excessively high bearing temperature
D.
excessive carbon buildup in the lube oil
【判断题】康熙时,仿照《明会典》制定《康熙会典》。其后,雍正、乾隆、嘉庆、光绪四朝均续加修定,号称五朝会典。《明会典》不仅是中国封建时代最完备的行政法规,而且是中国封建时代行政立法的总汇。
【单选题】以下关于描述紫绀错误的为
E.
紫绀是血液中脱氧血红蛋白增多至皮肤粘膜呈青紫色的现象
【单选题】关于发绀的描述错误的是:
A.
当血液中去氧血红蛋白含量达到50g/L以上时,皮肤、黏膜呈现暗紫色称为发绀
【单选题】Which is the topic of “Last night, thick mist made flying impossible”?
【单选题】Because of the mist, none of those who saw the flying objects could tell its _________shape.