【多选题】用于河流水体修复的高效微生物群(简称EM)包括哪些种类的微生物( )。
【单选题】( )活性升高,晶状体内多元醇过度蓄积,可导致糖尿病性白内障
【单选题】According to the passage, the difference between a gas and a liquid under normal conditions on Earth is that the liquid ______ .
A.
is affected by changes in pressure
B.
has a permanent structure
D.
is considerably more common
【单选题】Under normal conditions, the refrigerant enters the compressor in an operating refrigeration system as a _____.
【单选题】Under normal operating conditions,the rudder is hydraulically locked unless ______.
A.
The manual trick wheel is engaged for steering
B.
The variable stroke pump is off stroke
C.
A rudder order is given by the control system
D.
An electric power system failure occurs at the steering gear
【单选题】下列各项作用中是可变荷载的是( )。Ⅰ.风荷载 Ⅱ .雪荷载 Ⅲ.地震作用 Ⅳ. 楼面活荷载Ⅴ.温度变化 Ⅵ.土压力 Ⅶ.安装检修荷载
【判断题】The state can be the subject of economic legalrelations under certain circums ances.
【单选题】Under normal conditions, the main source of crankcase oil contamination is attributed to ______________.
A.
metal particles loosened by wear
B.
air when air cleaners are not used
C.
condensation of water vapors
D.
breakdown of the lubricating oil by dilution
【判断题】1820年,《历史文物及艺术品保护法》在教皇主持下,由红衣主教团以政府名义颁布。()