【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
【单选题】(1-3题共用题干) 患儿男,9岁。水肿、血尿10天,进行性少尿8天,10天前晨起发现双眼睑水肿,尿色发红。8天前尿色变浅,但尿量进行性减少,查体:T 36.9℃,R 24次/分,BP 145/80mmHg,发育正常,营养中等,重病容,精神差,结膜稍苍白,巩膜无黄染。化验尿蛋白(++)、镜检白细胞(+)/HP、红细胞(++)/HP,补体C30.48g/L,ASO:800IU/L。 '少尿'是指24...
【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
【判断题】一般来说,对曲面 ,若 有连续偏导数且 那么 上的每点都有切平面而且法向量 是连续变化的,称这样的曲面为光滑曲面( ).
【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.