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[多选题] 电动机外壳带电引起的原因可能是()。[1.0分]
A. 接地不良
B. 接线板损坏或表面油污太多
C. 电机相序接反
D. 绕组受潮
E. 绕组绝缘损坏

热门试题:

[单选题]先天性甲状腺功能低下分类为
A.散发性、地方性
B.碘缺乏性、非碘缺乏性
C.遗传性、非遗传性
D.碘缺乏性、非碘缺乏性、混合性
E.原发性、继发性、散发性
[单选题]小芳在某次其中考试中,估计自己的英语考试成绩80分,但其实际成绩85分。于是,他讲期末考试中英语考试的理想成绩定位90分,根据雷顿·奥尔德弗ERG理论,这反映了该学生的( )。
A.成长需要
B.关系需要
C.求职需要
D.自我实现需要
[单选题]辽宁省农村信用社个人客户经理需具备的基本条件:具有国务院教育行政部门认可的大专学历且从事金融工作满____年或本科及以上学历且从事金融工作满____年的在编在岗正式职工;
A.3、2
B.2、1
C.5、3
D.2、2
[单选题] 线路验电时应戴绝缘手套。
A.正确
B.错误
[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.’Choose TWO letters, A-E. Write the correct letters in boxes 34 and 35 on your answer sheet. Which TWO statements are true about the Jacobson’s study according to Reading Passage 3 A It is based on the public data from 62 countries over the world. B It is found that the law is more useful in high density cities than in countryside. C It is implemented by analysing the data in real life rather than doing experiments in the labs. D Its limitation does not hinder the application to the whole country. E The increasing number of mobile users reduces the impact of the law. Do the following statements agree with the information given in Reading Passage 3
[单选题]空气的组成是(_____)
A.90%氮,6%氧和4%其他气体
B.78%氮,20%氧和2%其他气体
C.78%氮,21%氧和1%其他气体
[判断题]当压下量一定时,轧辊直径愈大,轧件愈容易咬入。
A.正确
B.错误
[单项选择]气胸叩诊时呈 ( )
A. 清音
B. 鼓音
C. 浊音
D. 过清音
E. 实音
[单选题]=胡:提琴:弦乐( )
A.水杉:兔子:生物
B.MP3:MP4:电器
C.汽车:自行车:机器
D.铅笔:钢笔:笔
[单选题]子网掩码的作用是()。
A.可以用来寻找网关
B.可以区分IP和MAC
C.可以识别子网
D.可以区分主机和网关
[填空题]“其身正,不令而行;其身不正,虽令不从”这句话体明了教师劳动具有__________的特点。
[填空题]自邓小平提出建设有中国特色社会主义的命题以来,我们党就一直把它当作中心口号来使用。中共十三大、十四大、十五大、十六大、十七大、十八大都始终强调高举中国特色社会主义伟大旗帜。党的十八大报告标题为( )。
[单选题]检修罐车的单位应具备相应的洗罐、( )试验、罐车阀类检修能力
A.通汽
B.单车
C.水压
D.漏雨
[多选题]液压顶推装置使用前应检查油泵、油管路、密封垫、仪表等工作性能是否正常,滑动面有无障碍,(  )装置是否可靠。
A.

A.限位
B.B.报警
C.C.安全防护
D.D.监测

[判断题]应急物资至少每周巡视检查、送修、保养、维护一次。
A.正确
B.错误
[单选题]睐 SR通过什么命令来查看设备的当前系统时间
A.show uptime
B.show chassis
C.show system information
D.show time
[单选题]高速铁路电力工程施工工艺要求:电缆中间头与邻近电缆之间的净距离不得小于()m,当不能符合时须采取隔离措施。
A.0.15
B.0.2
C.0.25
D.0.3
[多选题]下列关于买卖合同中标的物所有权移转的表述中,哪几项错误? ( )
A.标的物的所有权自标的物交付时移转
B.标的物的所有权自合同成立时移转
C.标的物的所有权自标的物交付时移转,但当事人另有约定或者法律另有规定的应当除外
D.标的物的所有权自合同生效时移转
[判断题]混凝土可以在温度符合规定的静水中养护。
[单选题]列车在车站发车前,司机必须确认( )及发车信号显示正确后,方可起动列车。
A.行车凭证
B.货票齐全
C.全列完整
[单项选择]消防控制室的门以下描述正确的是( )
A. 应向前室开启
B. 应向室外开启
C. 应向楼梯开启
D. 应向疏散方向开启,且入口处应设置明显标志
[多选题]CG操作维护功能测试包括哪些项目? ( )
A.局数据配置功能
B.告警功能
C.性能统计
D.日志管理和安全管理
[单选题]滚动轴承符合退卸条件时须退卸,按规定分别进行( )、大修或报废。
A.段修
B.一般检修
C.全面检修
D.重点检修
[单项选择]某小组将调查到的生物进行了分类,他们将鲫鱼、金鱼、水草、荷花、水鸭、蟹等归为一类,而将松、柏、蝇、玫瑰、麻雀等生物归为一类,他们是按照什么方法归类的()
A. 按照生物的形态
B. 按照生物的用途
C. 按照生物的数量
D. 按照生物的生活环境
[多项选择]下列资产负债表中的部分项目,属于所有者权益的有( )。
A. 应收账款
B. 实收资本
C. 资本公积
D. 未分配利润
[判断题]10千伏装有自动分段器的架空线路,线路停电工作前,将一经合闸即可向停电检修线路送电的负荷开关的自动装置停用;完工恢复送电后,再将其自动装置运行
A.正确
B.错误
[多选题]下列关于扣押措施的叙述正确的是()
A.实施扣押应当经过办案部门以上负责人审批
B.扣押物品清单应当一式三份填写,一份交被扣押物品持有人,一份由办案人民警察附卷备查,一份交由被扣押物品保管人
C.发还被扣押物品时,只需被扣押物品的持有人在扣押物品清单“发还情况(接收人签收)”一栏中签名即可,无需履行其他手续
D.对扣押物品需要进行鉴定、检测、检验的,鉴定、检测、检验期间不计入扣押期间,但应当将鉴定、检测、检验时间告知当事人
[多项选择]在eTOM模型中,完成电信运营企业向客户提供服务并收取费用的整个过程的流程群组包括( )。
A. 业务开通
B. 业务保障
C. 业务计费
D. 运营支持与就绪
E. 资源管理与运营
[单选题]货运营销的总体原则是:以( )为导向,坚持全品类开发、全流程服务、全方位经营、全过程管理的理念。
A.市场
B.客户
C.运输
D.效益
[单选题]35kV电力网电能输送的电压损失应不大于()。
A.0.05
B.0.08
C.0.1
D.15%。
[单选题]急性肾小球肾炎的病因是哪种菌感染
A.β溶血性链球菌
B.肺炎链球菌
C.大肠杆菌
D.葡萄球菌
[单选题]准许机动车掉头的地方是()
A.铁路道口
B.环岛
C.隧道
D.人行横道
[判断题]强令他人违章冒险作业,或者明知存在重大事故隐患而不排除,仍冒险组织作业,因而发生重大伤亡事故或者造成其他严重后果的,情节特别恶劣的,处五年以上有期徒刑。
A.正确
B.错误
[单项选择]下列常用电光源中,功率因数最大的为()。
A. 白炽灯
B. 日光灯
C. 高压汞灯
D. 高压钠灯
[单选题]我国各建筑企业广泛采用的电压为( )的三相四线制供电系统。
A.110V
B.220V
C.660V
D.380V
[单选题] 题目:一个国家,一个民族,要同心同德迈向前进,必须有( )作支撑。
A.共同的理想信念
B.共同经济
C.共同文化
D.共同的宗教信仰
E.
F.
[多选题]掘进井巷和硐室时,必须采取( )洒水和净化风流等综合防尘措施。
A.湿式钻眼
B.。冲洗井壁巷帮
C.水炮泥
D.爆破喷雾

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