| 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. [单选题](44303)安装照明电路时，开关和插座一般离地不低于（ ）m。
A.2.0 B.1.8 C.1.5 D.1.3 [单选题]国务院统一领导全国的生产安全事故应急工作，（ ）地方人民政府统一领导本行政区域内的生产安全事故应急工作。
A.县级 B.市级 C.县级以上 D.市级以上 [单项选择]深圳证券交易所配股缴款结束后，如配股发行失败，结算公司在（ ）不进行除权，并将配股认购的本金退还到结算参与人结算备付金账户。
A. R+7日 B. R+6日 C. R+5日 D. R+1日 [多选题]疏散物资必须在单位负责人或者技术人员的配合下有序进行，视情利用铲车等机械车辆提高疏散效率，对疏散出的物品，必须（）。
A.指定专人看护 B.检查是否夹带火种 C.分类存放 D.用水浸湿 [不定项选择]中国甲公司与英国乙公司订有一笔货物销售合同，约定以跟单托收方式结算。甲公司交运货物后，开立了以乙公司为付款人的见票即付汇票，并附随单据，交由中国银行某省分行通过中国银行伦敦分行向乙公司收款。下列何种表述是错误的？
A. 中国银行某省分行是托收行，中国银行伦敦分行为代收行 B. 中国银行某省分行与中国银行伦敦分行之间是委托关系 C. 如果中国银行伦敦分行违反托收指示行事，导致甲公司遭受损失，甲公司可以直接对其起诉 D. 中国银行伦敦分行与乙公司之间没有法律上的直接关系 [单选题]关于栓剂基质可可豆脂的叙述错误是
A.具有多种晶型 B.熔点为30-35℃ C.10-20℃时易粉碎成粉末 D.有刺激性，可塑性差 E.相对密度为0.990-0.998 [名词解释]中断系统
[单选题]下列均是肾前性肾功能不全的诱因，除外( )
A.失血 B.恶性高血压 C.过度利尿 D.严重腹泻 E.心包填塞 [判断题]1938年成立的延安市警察队是我国历史上最早的一支比较正规的人民警察队伍。 ( )
[单选题] 所选择的测井系列需能准确地提供孔隙度、含水饱和度、束缚水饱和度、可动油量、残余油气饱和度、泥质含量及渗透率的近似值等( )参数。
A.水力 B.钻井 C.地质 D.岩性 [多选题]区域协调发展的机制体系包括（ ）。
A.援助机制 B.合作机制 C.调控机制 D.市场机制 E.治理机制 我来回答: 提交
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