热门试题:
[单选题]铁路营业线施工按高速铁路和普速铁路进行管理。普速铁路分为（ ）。
A.繁忙干线、干线
B.干线和其他线路
C.繁忙干线、干线和其他线路
D.干线和客运专线
[单选题]集中器在供电电源中断后，应有措施至少保证与主站通信（_）次并正常工作（_）min。
A.1，1
B.3，3
C.3，1
D.1，3
[单项选择]在速率散射比浊分析的反应介质中加入的最常用的促聚剂是（ ）
A. PEG
B. 95%乙醇
C. 稀盐酸
D. 硫酸铵
E. 丙三醇
[单选题]发动机前置后驱动中连接发动机和驱动轮的是( )。
A.离合器
B.传动轴
C.传动系
D.驱动桥
[判断题]救援舟艇转运遇险人员或贵重物资时，应充分考虑舟艇的动 力，必要时更换加大舷外机马力。( )
A.正确
B.错误
[单选题]下列关于寒颤的说法，正确的是
A.是机体代谢活动增强 的结果
B.伸肌和屈肌同时收 缩，产热量很高
C.能增加身体周围隔热 空气层的厚度
D.表现为毛孔收 发直立
[单项选择]组织中对于保密程度要求较高的沟通可以选用的沟通形式是（）
A. 链式沟通
B. 轮式沟通
C. Y式沟通
D. 全方位式沟通
[单项选择]关于牙萌出的一般生理特点，说法错的是
A. 在一定时间内，按一定顺序先后萌出
B. 中线左右同颌的同名牙几乎同时萌出
C. 上颌牙与下颌同名牙几乎同时萌出
D. 下颌牙的萌出要比上颌的同名牙早
E. 同龄人中女性牙的萌出要早于男性
[判断题]作业人员离开工作现场，工作票所列安全措施不变，宜办理工作间断，但每次复工前应检查安全措施正确完好。
A.正确
B.错误
[简答题]______是快速准确测量蓄电池健康状态和荷电状态以及连接电阻参数的便携式数字存储式测试仪器
[多项选择]采用FIDIC《施工合同条件》的工程，进度计划的内容一般包括( )等。
A. 施工工程的计划进度
B. 分包商在施工阶段的安排
C. 重要检查检验的次序和时间
D. 保证计划实施的说明文件
E. 滞后于进度计划的责任
[单项选择]正常人腮腺及下颌下腺分泌量占总唾液分泌量的（）。
A. 75%
B. 80%
C. 85%
D. 90%
E. 95%
[单项选择]尿脱落细胞检查阳性是（）
A. 肾癌
B. 膀胱癌
C. 前列腺癌
D. 睾丸肿瘤
E. 前列腺增生
[单选题]半导体的稳压功能是利用（）。
A.PN结的单向导电性
B.PN结的正向导通特性
C.PN结的反向截止特性
D.PN结的反向击穿特性
[单项选择]电热风枪是专门用于焊接或拆装（）的专用焊接工具。
A. 高密度装配元器件
B. 插装的元器件
C. 表面贴装元器件
D. 通孔安装
[单选题]列车在区间时，电客车由司机负责指挥，工程车由（ ）负责指挥；列车在车站时，由车站值班站长负责指挥，或由行调用无线电话直接指挥列车司机。
A.司机
B.车长
C.值班站长
D.值班员
[单项选择]加快我省汽车产业发展，带动上下游相关产业，关键是（）
A. 做大做强汽车产业规模
B. 提高汽车产业省内配套水平和能力
C. 大力开发汽车核心技术
D. 全力为一汽发展做好服务
[单选题]铁路工程测量规范中,隧道洞内CPII导线观测应采用标称精度不低于( )。【该题涉及2.2内容】
A. 2″ ,5mm+2ppm
B. 1″ ,2mm+2ppm
C. 1″ , 5mm+2ppm
D. 2″ ,2mm+2ppm
[单选题]On trade,President Donald Trump has launched lots of investigations,withdrawn from one deal and started the renegotiation of another.But this week is the first time he has put up a big new barrier On January 22nd he approved broad and punitive duties,of up to 30%on imports of solar panels and up to 50%on imports of washing machines.His backers say that the measure,which affects aroundS 10bn of imports,will protect American workers.His critics cling to the hope that the damage will be mild.Both are wrong.Start with the claims made by the administration.Workers are also consumers,and Mr Trump's actions will whack them.Tariffs raise prices and dull competition.Whirlpool Corporation,the washing machine maker which asked for the duties,knows as much.When,n 2006,it merged with maytag,arival,it quelled concerns about its high market share by pointing to competition from abroad.One study found that clothes-dryer prices rose by 14%after the merger.For washing machines,where import competition was fiercer,prices were unchanged The solar industry is a clearer case.It has about 260,000 workers,a mere 2,000 of whom were making solar cells and panels at the end of 2016.The government reckons that the fastest-growing occupation over the next ten years will be that of solar installer.The Solar Energy Industries Association,a body that is enraged by the new tariffs,reckons that the industry will support up to 23,000 fewer jobs because of them.Meanwhile,as if to underline the irony,the two companies that asked for protection are unlikely to be saved And do not forget that the tariffs may harm American industry more broadly.Restricting markets for imports tends to spark retaliation that restricts markets for exports-especially when,as with these latest tariffs,they affect everyone.China,supposedly the focus of American ire,produces 60%of the world,solar cells and is responsible for 21%of America's imports.But South Korea will also be hit,and its government is poised to dispute America's action at the World Trade Organisation.Other casualties include Mexico,Canada and the European Union That Mr Trump has stayed within the rules is small comfort:they give him enormous scope to poison world trade.And it would be wrong to skate over the differences between his administration and its predecessors.The last time this particular safeguard was applied was in 2002.It is especially belligerent.Past presidents remained wary of hurting American consumers,and mindful of international repercussions.Mr.Trump,by contrast,seems to hold a steadfast belief that protectionism works.His rhetoric-and now his actions-invite aggrieved petitioners to apply for help.The logic of his stance on trade is to use tariffs not sparingly,but repeatedly and aggressively.Mr Trump is now open for business,just not the healthy sort
The case of Whirlpool Corporation mentioned in Paragraph 2 intends to
A.explain how and why workers suffer from Trump's policy
B.prove the benefits of raising tariffs to American public
C.highlight the importance of merges among corporations
D.illustrate the tactics used against the foreign competitors
[单项选择]男性，45岁，一年半前因右股骨颈骨折行三翼钉内固定治疗。半年前骨折愈合取出内固定。近3个月出现右髋痛，承重时明显。体格检查：右下肢短缩不明显，无外旋畸形。髋关节屈伸活动0°～80°，旋转明显受限。股骨纵向叩击痛（-）。X线摄片提示"股骨头略微有些扁平，头内有囊变区"。若该患者年龄为70岁老年患者，一般情况良好，首选（）。
A. 减少负重，定期摄片随访
B. 人工全髋关节置换
C. 高压氧舱治疗
D. 带血管蒂的骨移植于股骨头囊变区
E. 股骨头钻孔减压
[判断题]呼吸作用中必定有氧的消耗和CO2的释放。
A.正确
B.错误
[判断题]已质押冻结的存款账户原则上不得出具资金证明。如确需出具，应在明显位置标明“**账号存款已质押冻结”字样，并提交法律部门审核确认。（）
[单选题]加强作风建设,必须紧紧围绕(),增强群众观念和群众感情,不断厚植党执政的群众基础。( )
A.保持党同人民群众的血肉联系
B.坚持党的群众路线
C.严格遵守八项规定
D.反对“四风”
[多项选择]组织是为了使系统达到其特定的目标，是全体参加者经分工与协作以及设置不同层次的权力和责任制度而构成的一种人的组合体。组织的构成要素包括( )。
A. 管理制度
B. 管理部门
C. 管理职责
D. 管理层次
E. 管理跨度
[单选题] 分布式分散控制的结构的基本特征是:系统划分为多个模块,每个模块的自主处理能力显著(),中央处理机功能则在很大程度上弱化。
A. 增强
B. 弱化
C. 降低
D. 分散
[单选题]男性，12岁，反复发热、尿色深黄4年。体检：巩膜轻度黄染，脾肋下3cm。检验：血红蛋白75g／L，网织红细胞9％；血涂片示红细胞成小球状，中央苍白区消失；尿胆红素（-），尿胆原强阳性；红细胞渗透脆性试验正常，Rous试验（-）。为明确诊断，宜选择下列哪项实验室检查
A.碱变性试验
B.自体溶血试验
C.HAMS试验
D.高铁血红蛋白还原试验
E.冷热溶血试验
[多选题]按口头或电话命令执行的工作为（ ）。
A.测量接地电阻
B. 修剪树枝
C.杆塔底部和基础等地面检查、消缺工作。
D.涂写杆塔号、安装标示牌等，工作地点在杆塔最下层导线以下，并能够保持表4安全距离的工作。
[单项选择]对于大多数的产业，项目费用大多发生在项目生命期中的哪一阶段？（）
A. 构思阶段
B. 开发或设计阶段
C. 执行阶段
D. 结束阶段
[多项选择]对于试验压力的要求正确的是（）。
A. 一般动力管道为工作压力的1.25倍
B. 不得小于工作压力加300Kpa
C. 机车管道为工作压力的5～10倍
D. 试验压力越大越好
[判断题]在低压线路上带电工作,同一根杆上有二人作业时,严禁二人同时在不同的相位上带电工作。 ( )
A.正确
B.错误
[多选题] 服务用语基本用语包括( )。
A.先生
B.请
C.对不起
D.谢谢
[判断题]模板拆除应逐次进行，由上向下先拆除支撑和本层卡扣，同时将模板送至地面，然后再拆除下
层的支撑、卡扣、模板。不得采用猛撬、硬砸及大面积撬落或拉倒方法。
A.正确
B.错误
[单选题]在掘进工作面或其他地点发现有透水预兆时,必须( )。
A.停止作业,采取措施,报告矿调度,撤离人员
B.停止作业,迅速撤退,报告矿调度
C.采取措施,报告矿调度
D.停止作业,报告矿调度
[不定项选择题]共用题干
第一篇
DNA Testing
DNA testing reveals the genes of each individual person.Since the early twentieth century scientists
have known that all human characteristics are contained in a person's genes and are passed from parents to
children.Genes work as a chemical instruction manual for each part and each function of the body.Their
basic chemical element is called DNA,a copy of which can be found in every cell. The existence of genes
and the chemical structure of DNA were understood by the mid-1900s,but scientists have only recently been
able to identify a person from just a drop of blood or a single hair.
One of the most important uses of DNA testing is in criminal investigation.The very first use of DNA
testing in a criminal case was in 1985 in Great Britain,when a man confessed to killing a young woman in
the English countryside.Because police had found samples of the killer's DNA at the scene of the crime,a
biologist suggested that it might be possible to compare that DNA to some from the confessor's blood.To
everyone's surprise,the tests showed that he was not the killer. Nor was he guilty of a similar murder that
had happened some time earlier. At that point he admitted that he had confessed to the crimes out of fear
and police pressure.The police then asked 5,000 local men for samples of their blood,and DNA testing
revealed that one of them was the real murderer,so the first man was set free.
In 1992,two law professors,Peter Neufeld and Bany Scheck,decided to use DNA evidence to help set free
such mistakenly convicted prisoners.With the help of their students.they created a not-for-profit organization
called the Innocence Project. Most of their clients are poor men,many from racial and ethnic minorities.In
fact,studies have shown that U. S. judges and juries are often influenced by racial and ethnic background,and
that people from minority groups are more likely to be convicted. Some of these men had been sentenced to
death,a form of punishment used in thirty eight states out of fifty(as of 2006).For most of these prisoners,their
only hope was another trial in which DNA testing could be used to prove their innocence.
Between 1992 and 2006,the Innocence Project helped free 100 men.Some of these prisoners had been
in jail for ten,twenty years or more for crimes they did not commit.However,the goal of the Innocence
Project is not simply to set free those who are wrongfully in jail.They also hope to bring about real changes
in the criminal justice system.
Illinois in the late 1990s,a group of journalism students at Northwestern University were able to bring
about such a change in that state.They began investigating some Illinois prisoners who claimed to be inno-
cent. Through DNA testing,the students were able to prove that in fact the prisoners were not guilty of the
crimes they had been accused of. Thirteen of these men were set free,and in 2000,Governor Ryan of
Illinois decided to stop carrying out death sentences until further study could be made of the prisoners'
cases。
The use of DNA in criminal cases is still being debated around the world.Some fear that governments
will one day keep records of everyone'sDNA,which could put limits on the privacy and freedom of citizens.
Other people mistrust the science of DNA testing and think that lawyers use it to get their clients free whether
or not they are guilty.But for those whose innocence has been proven and who are now free men,DNA
testing has meant nothing less than a return to life.And with the careful use of DNA testing,no innocent
person should ever be convicted again.
What is the author's attitude toward DNA testing?
A.Negative.
B.Positive.
C.Suspicious.
D.Indifferent.
[单选题]车钩缓冲装置分解机压缩缓冲器，卸下钩尾扁销()，取下钩尾扁销，车钩、钩尾框、从板、缓冲器
A.横穿螺栓
B.钩尾扁销
C.车钩
D.钩尾框
[单选题]给水站因列车给水问题被铁路总公司通报的,每次月度安全生产与多元经营一体化考核减<___>。( )
A.5分
B.10分
C.15分
D.20分
