热门试题:
[单选题]环网柜应在停电、验电、（ ）后，方可打开柜门。
A.合上接地刀闸
B.合上开关
C.挂上标示牌
D.合上刀闸
[判断题]营业线施工中发生责任事故，属工程建设、设计、监理、施工等原因造成的，定上述相关单位责任；同时追究设备管理单位责任。（）
A.正确
B.错误
[简答题]为什么检测烧鸡菌落总数时无论稀释还是接种前移取液体，均要注意摇匀？
[单选题]发动机常用的冷却介质主要有( )和防冻液两种。
A.井水
B.硬水
C.冷却水
[单项选择]喷吹燃料能取代焦炭的部分作用是（）。①发热剂②料柱骨架③还原剂
A. ①②
B. ②③
C. ②
D. ①③
[单选题]要严格按照项目操作规程进行操作。根据训练科目的危险性和危险环节,落实保护措施,保护措施不到位( )进行操作。
A.可以
B.不得
C.视情
D.提前
[判断题] 空气呼吸器警报器报警压力为15MPa。( )(易)
A.正确
B.错误
[单选题]蛇、猛兽和每头超过（ ）千克的活动物（警犬和运输命令指定运输的动物除外），不能按包裹运输。
A.5
B.10
C.15
D.20
[判断题]铁路特别重大事故的调查期限为60日。
A.正确
B.错误
[判断题]A-E-B-002 4 1 3
高速铁路无砟轨道结构总体上分为两大类,即预制板式无砟轨道和现浇混凝土式无砟轨道。
A.正确
B.错误
[判断题]十八层及十八层以下的单元式住宅,可设一根竖管,但必须采用双阀双出口型消火栓。
A.正确
B.错误
[判断题]根据产品形态，金融衍生工具可分为交易所交易的衍生工具和嵌入式衍生工具。
[单选题]许多电子元器件采用磁性材料制成，如()。
A.发光二极管
B.三极管
C.电容器
D.扬声器的磁钢
[单选题]奶油胶冻的成型方法有多种，常见的方法有刻压法、借助模具、 ( )等。
A.裱制
B.挤注法
C.用刀直接切割
D.灌注
[单选题]甲便利店为增值税小规模纳税人， 2020年第 4季度零售商品取得收入 1010000元；将一批外购商品无偿赠送给物业公司用于社区活动，该批商品的含税价格 808元。已知，该小规模纳税人上述业务减按 1%征收率征收增值税。计算甲便利店第 4季度应缴纳增值税税额的下列算式中，正确的是（ ）。
A.[1010000+808÷（1+1%）]×1%
B.（1010000+808）×1%
C.[1010000÷（1+1%）+808]×1%
D.（1010000+808）÷（1+1%）×1%
[单选题]停电、送电工作必须指定( )负责。
A.安全员
B.技术员
C.专人
[单项选择]肺主一身之气的功能取决于（）
A. 呼吸运动
B. 宗气的生成
C. 全身气机的调节
D. 朝百脉
E. 主治节
[多项选择]要取得安全生产许可证的条件有（）。
A. 建立、健全安全生产责任制，制定完备的安全生产规章制度
B. 资金投入符合安全生产要求
C. 依法参加工伤保险，为从业人员缴纳保险费
D. 企业生产过程中未发生过安全事故
E. 按规定配备专职安全生产管理人员
[单选题]动物传染病的特征不包括 ( )
A.特定的病原微生物引起
B.传染性
C.流行性
D.世代交替
E.具有一定的流行规律
[简答题]汽轮机保护动作跳闸的现象及其处理措施有哪些？
[多选题]网银盾证书到期，可在（ ）换发
A.证书到期前一个月
B.证书到期前三个月
C.证书到期后
D.任意时间
[多选题]CIN可分为 ( )
A.宫颈原位癌
B.轻度不典型增生
C.中度不典型增生
D.重度不典型增生
E.极重度不典型增生
[单选题]根据《建设项目职业病防护设施“三同时”监督管理办法》，建设项目职业病防护设施“三同时”工作（ ）与安全设施“三同时”工作一并进行。
A.可以
B.不可以
C.视同
[单项选择]乳化泵安全阀的整定压力为泵整定压力的（）。
A. 100％-1110％
B. 110％-115％
C. 115％-120％
D. 115％-125％
[单选题]生产经营单位的安全生产管理机构是专门负责()的内设机构,其工作人员是()安全生产管理人员。
A.安全生产教育培训,专职
B.安全生产,专业
C.安全生产监督管理,专职
[多选题]中软触摸屏调度台主机电源部分为调度台提供所需的（ ）工作电源。
A.A、12V
B.B、5V
C.C、3V
D.D、9V
[判断题]民革、民盟、民建、民进、农工、九三学社、致公党、台盟是新中国八个民主党派。( )
A.正确
B.错误
[单项选择]根据《企业会计准则第7号——非货币性资产交换》的规定，下列项目中属于货币性资产的是( )。
A. 对没有市价的股票进行的投资
B. 对有市价的股票进行的投资
C. 不准备持有至到期的债券投资
D. 准备持有到至期的债券投资
[单选题]煤矿有(),负责煤矿有关证照颁发的部门应当责令该煤矿立即停止生产,提请县级以上地方人民政府予以关闭,并可以向上一级地方人民政府报告。
A.责令停产整顿后擅自进行生产的;无视政府安全监管,拒不进行整顿或者停而不整、明停暗采的
B.存在重大隐患,仍然进行生产的
C.特种作业人员未取得资格证书上岗作业的
[单项选择]腹部反跳痛的发生机制是
A. 肠腔胀气
B. 内脏肿大、充血
C. 肿瘤淋巴结转移
D. 炎症波及腹膜壁层
E. 胆管结石并梗阻
[填空题]钢丝网骨架管基材采用（），具有优异的抗腐蚀能力，对非强氧化性酸、碱和有机溶剂介质有很好的耐腐蚀性。
[单选题]在能源发展进程中，历次能源革命都依赖（ ）的重大突破。
A.发电技术
B.配电技术
C.变电技术
D.能源技术
[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.
[单项选择]超声检测扩张型心肌病的心功能改变，正确的是（）
A. 每搏量（SV）增大
B. 心输出量（CO）增大
C. 收缩、舒张功能指标均减低
D. 病变早期E/A＜1，晚期E峰可大于A峰
E. 快速充盈分数增大
[单项选择]连声咳嗽，夜咳为主，咳而呕吐，伴鸡鸣样回声的疾病是（）
A. 咽炎
B. 感冒
C. 白喉
D. 顿咳
E. 急喉风
[单项选择]下列（）激素缺乏时，人易患侏儒症。
A. 生长素
B. 糖皮质素
C. 促肾上腺皮质素
D. 甲状腺素
[判断题]3.335及时足额回收电费,加速资金周转,已成为衡量各级供电企业的经营水平的一个重要考核指标。
A.正确
B.错误
[多选题]通信作业人员的基本条件包括（）。
A.经医师鉴定，作业人员应无妨碍工作的病症。
B.参与公司系统所承担通信工作的外来作业人员应熟悉本规程，经考试合格，并经电力通信运维单位（部门）认可后，方可参加工作。
C.作业人员因故间断电力通信工作，应重新学习本规程，并经考试合格后，方可恢复工作。
D.新参加工作的人员、实习人员和临时参加工作的人员（管理人员、非全日制用工等）应经过电力通信安全知识教育后，方可参加指定的工作。
