【多选题】溃疡性结肠炎采用肾上腺皮质激素治疗,下列哪项不对
【多选题】关于循环气压缩机开车时以下错误的说法是()
【单选题】下列关于活塞压气机排气温度的说法错误的是()。
A.
气缸用油润滑时,排气温度过高会使润滑油黏度降低及润滑性能恶化
B.
空气压缩机中,因排气温度高润滑油中轻质馏分容易挥发、裂解,会导致气体中含油增加,并容易出现积炭现象
C.
当使用一般压缩机油时,积炭与排气温度有关,温度在90~100℃之间时积炭现象最严重
D.
考虑到润滑油的润滑性能,氮氢气压缩机的排气温度一般限制在160℃以下
【单选题】______the timely rescue, a lot more people would have been killed in the earth-quake.
【单选题】______ his proper timely dieting, he would have gained more weight.
【单选题】溃疡性结肠炎采用肾上腺皮质激素治疗,下列哪项正确
【简答题】Despite of taking more time to affect, which kind of organ is related to more serious effect on smokers?