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【单选题】
关于泌尿道感染,下列说法哪项不正确A.
是由细菌直接侵入泌尿道而引起的感染
B.
感染可累及上下泌尿道，因定位常有困难，统称为泌尿道感染
C.
根据清洁中段尿细菌培养有无细菌生长作为诊断依据
D.
临床表现及尿中检出细菌和较多白细胞可作出基本诊断
E.
婴儿期症状较复杂多变且常伴泌尿道结构异常，易导致肾瘢痕形成
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【单选题】()也被称为利息费用或机会成本,是仓储成本中的隐性成本。该成本如果占用过多,则反映企业失去相应的盈利能力。
A.
资本成本
B.
储存空间成本
C.
库存服务成本
D.
存货分险成本
【单选题】For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an _____.
A.
oil spray
B.
oil bath
C.
oil control rings
D.
drilled passage through the camshaft
【单选题】The oil lubricating diesel engine cylinders usually contain additives formulated to impart a high degree of alkalinity to _____ the acid conditions.
A.
invade
B.
provide
C.
detergent
D.
neutralize
【单选题】Excessive lubricating oil consumption in a running diesel engine can be caused by ________.
A.
clogged lube oil piping
B.
excessive valve-guide clearance
C.
high lube oil viscosity
D.
low lube oil temperature
【单选题】Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____.
A.
over-speed trip
B.
audible/visual alarm
C.
the ships/boats general alarm
D.
reserve oil storage tank
【简答题】What's the function of the lubricating oil in main engine?
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