Astronaut Jim Voss has enjoyed many memorable
moments in his career, including three spaceflights and one space walk. But he
recalls with special fondness a decidedly earthbound (为地球引力所束缚的) experience in
the summer of 1980 when he participated in the NASA-ASEE Summer Faculty
Fellowship Program. Voss, then a science teacher at West Point, was assigned to
the Marshall Space Flight Center’s propulsion lab in Alabama to analyze why a
hydraulic fuel pump seal on the space shuttle was working so well when previous
seals had failed. It was a seemingly tiny problem among the vast complexities of
running the space program. Yet it was important to NASA because any crack in the
seal could have led to destructive results for the astronauts who relied on
them. "I worked a bit with NASA engineers," says Voss, "but I did
it mostly by analysis. A. Because previous seals all failed. B. Because it was very complex in running the space program. C. Because great care has to be taken of the hydraulic fuel pump sealing. D. Because any crack in the seals would cause disastrous results for the astronauts. [单项选择]关于气管切开和机械通气的护理,叙述错误的是()。
A. 气管切开部位应保持清洁和干燥,并应根据分泌物多少及污染程度,每天1次或数次换药 B. 气管内导管应每日更换并进行煮沸消毒 C. 雾化器贮液瓶中的液体,必须24h更换1次 D. 每次吸痰必须更换吸引管,不得重复使用 E. 为了增加吸痰的效果,提高利用率,一根吸痰管应反复插入,重复多次进行吸痰 [判断题]饮酒管控方面,总队只抽查总队机关干部、支队级单位班子成员和督导员、大队主官
A.正确 B.错误 [多项选择]柜员次日及以后发现因()错误等原因造成贷款利息计算错误的,可通过利息冲正交易处理。
A. 贷款冲正 B. 利息登记 C. 贷款计息 D. 利息处理 [单项选择]急性腹膜炎非手术治疗的指征
A. 年老休弱,一般情况差 B. 病程超过24小时,腹部症状好转 C. 原发病灶不明 D. 病情复杂 E. 中毒症状明显 [单选题]下列有关老人皮肤颜色变化的叙述中错误的是( )。
A.出血性休克可引起全身皮肤颜色发绀 B.营养不良可引起皮肤颜色苍白 C.肝胆系统疾病可引起皮肤发黄 D.发热时皮肤颜色可变潮红色 [单项选择]长度为12的有序表:Apr,Aug,Dec,Feb,Jan,Jul,Jun,Mar,May,Nov,Oct,Sep,按折半查找法对该表进行查找。在表内各元素等概率情况下查找成功所需的平均比较次数为( )
A. 35/12 B. 37/12 C. 39/12 D. 43/12 [判断题]维修计划下达后,因特殊原因需临时增加维修作业时,在不与其他施工及维修作业产生冲突的前提下,高速铁路由设备管理单位报主管业务部室、普速铁路由设备管理单位报车务段(直属站)审核同意后,报施工办实施。
A.正确 B.错误 [简答题]KTA19-G2电子调速器发生故障的原因分析
[不定项选择题]停站手信号的显示地点为( )。
A.站台尾端墙处 B.站台头端墙处 C.就地显示 D.紧急停车按钮处 [填空题]ISO9001质量管理体系有三个层次的文件,它们是( )、( )和( )。
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