热门试题:
[判断题]自动密度仪仪器要放在坚硬的台面上,不能有影响到液滴振动的情况发生(液体不能振动)。( )
A.正确
B.错误
[判断题]旅客未上下车完毕,除本务机车、补机摘挂(包括可随机车一次性摘挂的专用车、发电车、检测车等车辆的摘挂作业)作业外,可以进行旅客列车(车底)的连挂。
A.正确
B.错误
[简答题]Read the following text carefully and then translate the underlined segments into Chinese. Your translation should be written neatly on the ANSWER SHEET. (10 points)
It was only after I started to write a weekly column about the medical journals, and began to read scientific papers from beginning to end, that I realised just how bad much of the medical literature frequently was. I came to recognise various signs of a bad paper: the kind of paper that purports to show that people who eat more than one kilo of broccoli a week were 1.17 times more likely than those who eat less to suffer late in life from pernicious anaemia. (46) There is a great deal of this kind of nonsense in the medical journals which, when taken up by broadcasters and the lay press, generates both health scares and short-lived dietary enthusiasms.
Why is so much bad science published? A recent paper, titled “The Natural Selection of Bad Science”, published on the Royal Society’s open science website, attempts to answer this intriguing and important question. It says that the problem is not merely that people do bad science, but that our current system of career advancement positively encourages it. What is important is not truth, but publication, which has become almost an end in itself. There has been a kind of inflationary process at work: (47) nowadays anyone applying for a research post has to have published twice the number of papers that would have been required for the same post only 10 years ago. Never mind the quality, then, count the number.
(48) Attempts have been made to curb this tendency, for example, by trying to incorporate some measure of quality as well as quantity into the assessment of an applicant’s papers. This is the famed citation index, that is to say the number of times a paper has been quoted elsewhere in the scientific literature, the assumption being that an important paper will be cited more often than one of small account. (49) This would be reasonable if it were not for the fact that scientists can easily arrange to cite themselves in their future publications, or get associates to do so for them in return for similar favours.
Boiling down an individual’s output to simple metrics, such as number of publications or journal impacts, entails considerable savings in time, energy and ambiguity. Unfortunately, the long-term costs of using simple quantitative metrics to assess researcher merit are likely to be quite great. (50) If we are serious about ensuring that our science is both meaningful and reproducible, we must ensure that our institutions encourage that kind of science.
[判断题]氢气、甲烷、乙烯、天然气等都是一级可燃气体。
A.正确
B.错误
[判断题]因工作原因需短时移动或拆除遮栏(围栏)、标示牌时,应有人监护。完毕后应立即恢复。
A.正确
B.错误
[单项选择]已知某建设工程影响范围为40km2,主要生态影响为生物量减少47%,则该项目的评价等级为( )。
A. 1级
B. 2级
C. 3级
D. 条件不足,难以判断
[单选题]下列内容是双方行政行为的是( )。
A.行政监督
B.行政处罚
C.行政委托
D.行政强制措施
[单选题]木材使用敞车装载时,装车后中心高度不得大于( )mm。
A.4000
B.4500
C.4600
D.5000
[多选题]根据交办运函(2017)1213号,符合国家标准要求允许上高速的运输车型有:()
A.平头铰接列车
B.长头铰接列车
C.中置轴车辆运输车。
[单项选择]不会出现颈静脉怒张的是
A. 左心功能不全
B. 缩窄性心包炎
C. 右心功能不全
D. 大量心包积液
E. 上腔静脉阻塞
[多选题]消费者有权根据商品的不同情况,要求经营者提供商品的( )。
A.价格
B.用途
C.主要成分
D.售后服务
[单选题]动车组车辆气密性受哪些方面影响:车体结构形式、车门密封、
、风挡密封。
A.车窗密封
B.头罩密封
C.空调密封
D.其它选项都不对
[单选题]国泰摩托募集大量资金,主要用途:(1)投资4883.6万元用于冲压生产线技术改造,年创效益1475万元;(2)投资4958.5万元用于焊接生产线技术改造,年创效益1980万元;(3)投资4957.9万元用于发动机箱体、箱盖生产线技术改造,年创效益2039.29万元;(4)投资4955.3万元用于发动机曲轴连杆生产线技术改造,年创效益2376.5万元;(5)投资4850.57万元用于塑料注塑成型加工生产线技术改造,年创效益1980万元。
在(1)~(5)中哪一项投资最大?( )
A.(1)
B.(2)
C.(3)
D.(4)
[单项选择]Now, don't tell anyone else what I've just told you. Remember, it's______.
A. controversial
B. secretive
C. confidential
D. sacred
[多选题]在进入( )搜救人员时,要在水枪冷却掩护或者驱散稀释措施的配合下行动。救援人员要携带救生担架、一次性防毒面具或其他呼吸保护器具,用于救助和保护被困人员。
A.浓烟
B.高温
C.有毒区域
D.洁净区域
[简答题]AP在AC页面显示“离线”或者“空闲”,可能的原因有( )。
[单选题]通信电源模块配置容量必须满足( )要求。
A.N+1
B.N-1
C.负载
[多选题]应在以下情况下重新洗手消毒
A.处理食品活动前
B.上过洗手间后
C.处理可能污染的物料后,立即清洗消毒
D.每次完成不卫生的动作或工作后
E.咳嗽和打喷嚏时应用手掩住口鼻,然后彻底对手清洗消毒
[判断题]我国的社会主义改造取得了历史性的胜利,也出现了一些失误和偏差,但是,不能因为出现这些失误和偏差而否定社会主义改造的伟大意义。
A.正确
B.错误
[多选题]易燃品、油脂和带油污的物品不得与氧气瓶同车运输。禁止( )同车运输。
A.氧气瓶
B.乙炔瓶
C.氟气瓶
D.氯气瓶
[判断题]供电电源中断后,专变采集终端时钟至少正常运行5年。电源恢复时,内部时钟正常运行。
A.正确
B.错误
[单选题]对于供电可靠性,下述说法中正确的是()
A.A. 所有负荷都应当做到在任何情况下不中断供电
B.B.一级和二级负荷应当在任何情况下不中断供电
C.C.除一级负荷不允许中断供电外,其它负荷随时可以中断供电
D.D.一级负荷在任何情况下都不允许中断供电、二级负荷应尽可能不停电、三级负荷可以根据系统运行情况随时停电
[单选题]在人的各种需要中,最低层次的需要是( )。
A.生理需要
B.安全需要
C.尊重需要
D.社会需要
[多选题]听觉感知设备应具有的特性是( )。
A. 全向三维定位特性
B. 沉浸式定位特性
C. 分步跟踪特性
D. 三维实时跟踪特性
[单项选择]计算机采用二进制数的最主要理由是( )。
A. 符合人们的习惯
B. 数据输入输出方便
C. 存储信息量大
D. 易于用电子元件表示
[单选题] 焊机负载持续率增大,则焊机许用电流增大。 ( ) 【判断题】
A.正确;
B.错误
[多项选择]影响部门剩余收益的因素有( )。
A. 支付股利
B. 销售收入
C. 投资额
D. 资本成本率
[单项选择]穿第6~1颈椎横突孔,经枕骨大孔入颅的结构是()
A. 副神经
B. 椎动脉
C. 下腔静脉
D. 胸背神经
E. 肩胛背神经
[判断题]整流设备的设备容量小于额定输出直流功率。
A.正确
B.错误
[单项选择]一般处方当日有效,特殊情况下由医师注明,但有效期最多不超过()
A. 2天
B. 3天
C. 4天
D. 5天
E. 7天
[填空题]中国动画的创始人为()、()和万超尘,简称万氏三兄弟。
[单选题]延期复审 ( )的,特种作业证失效。
A.通过
B.合格
C.不合格
[单选题]
窗口的移动可通过鼠标选取()后按住左键不放,至任意处放开来
实现.
A.标题栏
B.工具栏
C.状态栏
D.菜单栏
[单选题]灯桥照明配线沿桥支柱敷设时宜采用( )。
A.钢管配线
B.塑料管配线
C.绝缘子明配线
D.瓷夹板配线
[多选题]本案中,客户经理没有做好( )工作。
A. 现场检查项目工程进度
B. 查看抵押物现状
C. 了解楼宇的销售情况
D. 关注开发商的对外负债情况
[单选题]行驶跑偏的原因之一是( )。
A.转向器缺油
B.两侧钢板弹簧弹力不均
C.差速器失效
[单项选择]判断肾小球滤过功能的首选指标是()。
A. 血清胱抑素C
B. 内生肌酐清除率
C. 血肌酐测定
D. 血清尿素氮测定
E. 血B2-微球蛋白测定
[多选题] 以下设备中,属于一次设备的是( )。
A. 、隔离开关
B. 、继电器
C. 、操作电源
D. 、断路器
[判断题] 未经人民法院依法判决,对任何人不得确定有罪。
A.正确
B.错误