热门试题:
[单选题]女，55岁。有牙周病史10年，全口牙拔除2周后全口义齿修复，半年后义齿固位差，张口说话易脱落。最可能的原因是
A.人工牙排列偏唇颊侧
B.基托边缘过度伸展
C.垂直距离过高
D.颌位关系错误
E.牙槽嵴骨吸收
[单选题]电气化铁道用避雷器的额定电压UT为（ ）。
A.42≤UT≤84
B.60≤UT≤207
C.90≤UT≤468
D.5≤UT≤108
[判断题]当企业的各项消耗定额或费用定额比较准确、稳定，而且各月末在产品数量变化不大时，可采用定额比例法计算在产品的成本。
[判断题]测量直流电压和电流时，要注意仪表的极性与被测量回路的极性一致。
[多选题]多选"根据《治安管理处罚法》的规定,()违反治安管理的,可以从轻、减轻或者不予处罚
A.盲人
B.又聋又哑的人
C.肢体残疾的人
D.不满16岁的人"
[单选题] 短程无人机活动半径( )
A. 1 5km以内
B. 15~ 50km
C.50~ 200km
[单项选择]食品中干物质测定时，真空干燥的温度为（）℃。
A. 50～60
B. 70～80
C. 90～100
D. 30～40
[单选题]电力系统继电保护采用( )衡量其可靠性。
A.正确动作次数
B.正确动作率
C.误动作次数
[多选题]自然灾害、事故灾难或者公共卫生事件发生后,履行统一领导职责的人民政府可以采取下列一项或者多项应急处置措施:
A.组织营救和救治受害人员
B.封锁危险场所,划定警戒区
C.禁止或者限制使用有关设备、设施
D.保障食品、饮用水、燃料等基本生活必需品的供应
E.采取防止发生次生、衍生事件的必要措施
[单项选择]Internet Explorer是目前流行的浏览器软件，它的主要功能之一是浏览( )。
A. 网页文件
B. 文本文件
C. 多媒体文件
D. 图像文件
[多项选择]根据《合同法》的规定，约定债务抵销的( )。
A. 必须通知对方
B. 标的物的种类、品质可以不相同
C. 债务要求不高
D. 必须经当事人协商一致
E. 通知自到达对方时生效
[单选题]同志强调，反腐倡廉必须常抓不懈，拒腐防变必须警钟长鸣，要牢记“蠹众而木折，隙大而墙坏”的道理，努力做到干部清正、政府清廉、政治清明。下列说法与“蠹众而木折，隙大而墙坏”蕴含的哲理一致的是()。
A.善不积不足以成名，恶不积不足以灭身
B.勿以恶小而为之，勿以善小而不为
C.千淘万漉虽辛苦，吹尽狂沙始到金
D.问渠那得清如许，为有源头活水来
[多选题]铁路行车有关人员，在（ ）、改职前，必须经过拟任职业的任职资格培训。
A.任职
B.提职
C.单独
D.定职
[单项选择]门静脉高压症的临床特点不包括（）
A. 消瘦
B. 肝大
C. 食管静脉曲张.
D. 腹水
E. 肝功能异常
[判断题]在桥面上作业时应注意桥面及人行道上，不准有露尖的铁钉。( )
A.正确
B.错误
[多项选择]《医疗机构制剂许可证》的载明项目中，由药品监督管理部门核准的许可事项包括
A. 制剂室负责人
B. 配制地址
C. 配制范围
D. 有效期限
E. 注册地址
[填空题]Cell-Phone Bans While Driving Have More
Impact in Dense, Urban Areas
A The study,
conducted by Sheldon Jacobson, a professor of computer science and the director
of the simulation and optimisation laboratory at Illinois, analysed the
relationship between pre-and post-law automobile accident rates using public
data from 62 counties in New York. Jacobson and co-researchers Alexander
Nikolaev and Matthew Robbins published their results in an article titled
Evaluating the Impact of Legislation Prohibiting Hand-Held Cell Phone Use While
Driving, which will appear in a forthcoming issue of the Journal Transportation
Research Part A: Policy and Practice.
B The team found
that after banning hand-held cell phone use while driving, 46 counties in New
York experienced lower fatal accident rates, 10 of which did so at a
statistically significant level, while all 62 counties experienced lower
personal injury accident rates. They also discovered that the personal injury
accident rate decrease was more substantive in counties such as Bronx, New York
and Queens, where there was a high density of licensed drivers rather than in
sparsely populated areas of upstate New York. ’What that suggests is, if you
have a congestion of cars and you’re distracted, you’re more likely to hit
someone,’ Jacobson said. ’If you have a lower congestion of cars, you’re still
distracted, but you’re less likely to hit anyone because there are less people
to hit. It’s simple probability.’ Driver distraction is thought to be the cause
of nearly 80 per cent of automobile accidents in the U.S., resulting in about
2,600 deaths, 330,000 injuries and 1.5 million instances of property damage
annually.
C Although a ban on hand-held cell phone use
while driving in rural areas has less of an impact on driver safety, Jacobson
says that doesn’t necessarily mean the ban itself is worthless. ’Hand-held cell
phone bans are very valuable in high-density urban areas, but less so in
lower-density rural areas,’ Jacobson said. ’But that doesn’t mean they have no
impact in rural areas. It just means that such legislation is less likely to
have an impact on driver accident rates.’
D Jacobson’s
study differs from other studies in that, rather than focusing on reaction times
of simulated drivers in lab setting, it analysed publicly available data of
accident rates published by the New York State Department of Motor Vehicles. To
allow for a proper comparison between time periods, the years 1997 to 2001 were
treated as the pre-law time period, and the years 2002 to 2007 were considered
as the post-law time period. ’Nobody’s done a study like this before,’ he said.
’Everything prior to this is a micro-analysis of reaction time in laboratories
by researchers.’ The challenge, Jacobson said, was getting the right data to
analyse. ’The best state that had the data to analyse was New York,’ he said.
’They’ve had the hand-held cell phone ban in place since 2001. So we had a lot
of data.’
E Jacobson said one of the limitations of the
study is extrapolating the data from New York state and projecting it onto the
nation at large. ’That’s fraught with problems, but these are limitations we
acknowledge,’ he said. ’Every state is unique, but the overall conclusions still
stand to reason.’ Jacobson, who also holds appointments as a professor of
industrial and enterprise systems engineering, of civil and environmental
engineering, says the holy grail of data sets to analyse would be the property
damage data collected by insurance companies. Jacobson says the difference
between his study and one recently published by the Highway Loss Data Institute,
an affiliate of the Insurance Institute for Highway Safety, is that he used
publicly available data and the number of licensed drivers as a proxy for
accident prediction. (The insurance industry-backed report studied pre- and
post-ban insurance claims from accidents in California, Connecticut, New York
and Washington, D.C. It contends that state laws banning the use of cell phones
while driving didn’t reduce the number of vehicle crashes.) If the property
damage data were available to Jacobson and his co-researchers, ’We could come up
with a more definitive statement,’ he said.
F Another
challenge for Jacobson and his team was how to standardise accident data across
the counties. Their solution was to use the number of licensed drivers and
compare the statistical inferences to licensed-driver density. ’Measuring the
throughput of cars is very difficult,’ Jacobson said. ’As a result, using the
number of licensed drivers is a reasonable way to standardise, and
licensed-driver density provided an interesting measure to compare the
counties.’ The measures of traffic safety considered in the study are the number
of fatal automobile accidents per 100,000 licensed drivers per year and the
number of personal injury accidents per 1,000 licensed drivers per year,
Jacobson said. For the purpose of analysis, the personal injury accident rate
proved to be a more appropriate measure. ’The trend that we saw was that
high-density driving areas tended to have a more precipitous drop in the number
of fatalities and accidents after the ban was implemented than in lower- density
areas,’ Jacobson said. ’This was more pronounced for personal-injury rates than
it was for fatality rates.’
G Despite the exponential
growth in cell phone subscribers, Jacobson says that all the evidence suggests
that hand-held cell phone bans while driving are worthwhile. ’All the evidence
suggests hand-held cell phone bans while driving are a good thing, and this is
more evidence to that effect,’ he said. ’But it doesn’t establish it
definitively. There’s still more work to be done, but this helps to further
clarify the picture.’Jacobson’s team found the higher the density of licensed drivers is, the lower the individual injury accident rate is.
[多选题]解放思想、实事求是的思想路线( )。 ( )
A. 有力地推动和保证了改革开放的进行
B. 体现了辩证唯物主义和历史唯物主义的世界观方法论
C. 体现了革命胆略和科学精神的统一
D. 是邓小平理论的活的灵魂
[单选题]口腔科感染控制的最突出问题是
A.手机头消毒较困难
B.对消毒灭菌原理知之不多
C.对制度执行不严
D.消毒灭菌缺少严格分类
E.是对控制感染的正确评估
[填空题]挂运途中发现车辆抱闸时,应立即通知司机采用（ ）停车,检查（ ）是否松开,（ ）是否在正确位置,主、被动转换开关是否处于（ ）,紧急制动、辅助制动是否处于（ ）。
[单选题]空气压缩机最低启动压力为（ ）Mpa。
A.0.5MPa
B.0.65 MPa
C.0.75MPa
D.0.85MPa
[单项选择]不属于减少事故的安全技术措施是( )。
A. 设置薄弱环节
B. 避难
C. 限制危险物质
D. 救援
[单选题]疼痛的原因不包括( )
A. 温度刺激
B. 疼痛的部位和时间
C. 物理损伤
D. 病理改变
E. 心理因素
[单项选择]下列关于信用风险的说法，正确的是( )。
A. 信用风险只有当违约实际发生时才会产生
B. 对商业银行来说，贷款是唯一的信用风险来源
C. 信用风险包括违约风险、结算风险等主要形式
D. 交易对手信用评级的下降不属于信用风险
[判断题]应急救援活动中，确保各类安全风险处于可控状态是现场指挥员的重要职责。( )
A.正确
B.错误
[单选题]1911年4月,资产阶级革命派在黄兴带领下举行了( )
A.惠州起义
B.黄花岗起义
C.护国战争
D.护法战争
[判断题]因施工提前、延迟或其他原因造成运行揭示调度命令与实际限速、行车方式或设备不符时，列车调度员应取消前发运行揭示调度命令，向有关车站值班员、司机、施工负责人重新发布全部内容的调度命令。
A.正确
B.错误
[判断题]色彩具有3种属性,即色相、明度、纯度。
A.正确
B.错误
[填空题] 垂直交叉作业，层间应搭设严密、牢固的防护隔离设施，或采取防（ ）、防坠落等防护措施。 (1.0分)
[单选题]导引绳、牵引绳或导线临锚时，其临锚张力不得小于对地距离为（）m时的张力，同时满足对被跨越物距离的要求。
A.1.5
B.3
C.5
D.8
E./
F./
[单选题]超声波是振动频率超过人耳听觉范围的声波，是机械波的一种，其频率高于（ ）。
A. 20kHz
B. 2MHz
C.30kHz
D. 200kHz
[单项选择]患者，男，56岁。因情急恼怒而突发头痛而胀，继则昏厥仆倒，呕血，不省人事，肢体强痉，舌红苔黄，脉弦。其病机是（）。
A. 气郁
B. 气逆
C. 气脱
D. 气陷
E. 气结
[单项选择]下列说法错误的是：
A. 青藏高原上雪山连绵、冰山耸立，是世界上最大的“固体水库”
B. 准噶尔盆地位于天山以北，降水较多，农牧业发达，被誉为“塞北江南”
C. 柴达木盆地存储丰富的盐、石油、煤以及多种金属矿藏，被称为“聚宝盆”
D. 成都平原上有举世闻名的都江堰，自古农业发达，有“天府之国”的美称
[判断题]电流互感器额定一次电流的确定，应保证其在正常运行中的实际负荷电流达到额定值的60%左右，至少应不小于20%。否则，应选用高动热稳定电流互感器，以减小变比。
A.正确
B.错误
[单选题]《化学品分类和标签规范》(GB30000.X-2013 系列)从理化危险、( )和环境危险三个方面,将危险品分为 28 大类。
A.健康危险
B.安全危险
C.人身危险
D.贮存危险
