热门试题:
[判断题]工作许可人在接到所有工作签发人(包括用户)的终结报告,并确认所有工作已完毕,所有工作人员已撤离,所有接地线已拆除,与记录簿核对无误并做好记录后,方可下令拆除各侧安全措施。
A.正确
B.错误
[单项选择]
In early 2004 eight tiny sensors were dropped from a plane near a military base in California. After hit ting the ground, the sensors—also known as smart dust sensors organized themselves into a network and quickly detected a fleet of military vehicles on the ground. They determined the direction, speed and size of a series of military vehicles traveling along the road and later transmitted the data to a computer at a nearby base camp.
Smart dust sensors are minicomputers—as small as a grain of rice in some cases—that can monitor and evaluate their physical environment and can relay the information via wireless, communication. They can monitor elements such as temperature, moisture, humidity, pressure, energy use, vibration, light, motion, radiation, gas, and chemicals. These devices will soon have many applications, such as use in emergency rescue.
Software has been developed to run these minicomputers. A key feature of the software is the abili
A. the position of military troops
B. the presence of minicomputers
C. the strength of radio signals
D. the amount of water vapor in the air
[单项选择]某生产经营单位一职工周日加班时发现危化品仓库存在安全隐患,可能引发重大事故。一句《安全生产法》的规定,下列关于该职工隐患报考的说法,正确的是( )
A. 应次日向负责人报告
B. 应立即向负责人报告
C. 应立即向媒体报告
D. 不应报告
[单选题] 再生制动与电阻制动利用的都是电磁感应原理。(1.0分)
A.Yes
B.No
[判断题] 在带电设备周围,禁止使用钢卷尺、皮卷尺和线尺(夹有金属丝者)进行测量作业,应使用相关绝缘量具或仪器进行测量。( ) (1.0分)
A.正确
B.错误
[单项选择]主卷扬保护装置中()对大车的行程作保护。
A. 限位开关
B. 松弛开关
C. 过流保护
[多选题]消防员灭火防护胶靴适用于一般火场、事故现场进行灭火救援作业时穿着。但不能用于( )
A.有强腐蚀性液体
B.气体存在的化学事故现场
C.有强渗透性军用毒剂
D.生物病毒存在的事故现场
[单项选择]车门铰链在重新焊接到立柱上时,要采用()。
A. 电阻电焊
B. 气体保护焊的塞焊
C. 气体保护焊的连续焊
[单项选择]Internet可以提供多媒体虚拟现实技术,为人们创造五彩缤纷的网上娱乐生活。虚拟现实的含义是()。
A. 远程教育、远程会诊、电视购物
B. 通过计算机、传感器、显示器、控制技术建立起来的立体空间
C. 全球性网络世界,实现资源共享
D. 通过本地端的网络设备了解远端的情况
[单项选择]目前全球知名的会展企业主要集中在欧洲,全球前十大组展企业,欧洲占满十席,排在首位的是()。
A. 欧洲博闻
B. 英国励展博览集团
C. 法兰克福展览集团
D. 慕尼黑国际博览集团
[判断题]线路曲线正矢,每季应至少全面检查 1 次。
A.正确
B.错误
[单选题]属于同一电压等级、位于同一平面场所,工作中不会触及带电导体且同时停、送电的几个电气连接部分上工作时,应填用一张( )。
A.第一种工作票
B.第二种工作票
C.紧急抢修单
D.带电作业工作票
[单选题]心肺复苏法是挽救心跳呼吸骤停人员的重要急救措施。
A.A.对
B.B.错
[单项选择]表现出X线具有微粒性的现象是()
A. 频率
B. 波长
C. 能量
D. 折射
E. 反射
[单选题]为了防止司机可能产生的误操作,司控器调速手柄与换向手柄之间设有( )装置。
A.电气联锁
B.机械联锁
C.手动联锁
[多选题]防火墙应具备包过滤功能,具体技术要求如下()
A.防火墙的安全策略应使用最小安全原则,即除非明确允许,否则就禁止
B.防火墙的安全策略应包含基于源IP地址、目的IP地址的访问控制
C.防火墙的安全策略应包含基于源端口、目的端口的访问控制
D.防火墙的安全策略应包含基于协议类型的访问控制
E.略
F.略
[多选题]高级消防员包含有哪些消防员级别?
A.高级消防长
B.一级消防长
C.二级消防长
D.三级消防长
[单项选择]For the people who have never traveled across the Atlantic the voyage is a fantasy. But for the people who cross it frequently one crossing of the Atlantic is very much like another, and they do not make the voyage for the (41) of its interest. Most of us are quite happy when we feel (42) to go to bed and pleased when the journey (43) . On the first night this time I felt especially lazy and went to bed (44) earlier than usual. When I (45) my cabin, I was surprised (46) that I was to have a companion during my trip, which made me feel a little unhappy. I had expected (47) but there was a suitcase (48) mine in the opposite comer. I wondered who he could be and what he would be like. Soon afterwards he came in, He was the sort of man you might meet (49) , except that he was wearing (50) good clothes that I made up my mind that we would not (51) whoever he was and did not say (52) . As I had expected, he ’
A. tired enough
B. enough tired
C. enough tiring
D. enough tiring
[判断题]伸长率(延伸率)公式δ=(l1-l)/l×100%中l1指的是断裂后试件的长度。
[单选题]无人机驾驶员关于无人机发动机不需要了解的是
A.大车状态的连续工作时间
B.稳定怠速
C.发动机生产日期
[单选题] 正常地层随着埋深的增加,由于上覆岩层的压力增大,使得泥(页)岩孔隙度减小,岩石致密程度增加,( ),dc指数增大。(出自SY/T 6243-2009)
A.可钻性变差
B.钻井速度减小
C.机械钻速减小
D.钻时增大
[单项选择]酶竞争性抑制剂的特点是()。
A. Km值不变,Vmax降低
B. Km值不变,Vmax增高
C. Km值降低,Vmax降低
D. Km值降低,Vmax不变
E. Km值增高,Vmax不变
[多选题] 设有双向闭塞设备的自动闭塞区间,遇轨道电路发生故障等情况,需使用总辅助按钮改变闭塞方向时,车站值班员必须确认( )后,根据列车调度员命令,使用( )总辅助按钮改变闭塞方向,并在《行车设备检查登记簿》内登记。【铁总运〔2014〕172号铁路技术管理规程】
A. 区间空闲
B. 站内无信号
C. 总辅助按钮
D. 允许按钮
[单项选择]药典是()
A. 医疗必需、疗效确切、毒性和副作用小、质量稳定的常用药物及其制剂
B. 国家对药品质量规格及检验方法所作的技术规定,是药品生产、供应、使用、检验和管理部门共同遵循的法定依据
C. 质量标准、制备要求、鉴别、杂质检查、含量测定、功能主治及用法用量等
D. 一个国家记载药品标准、规格的法典
E. 能反映该国家药物生产、医疗和科技的水平,能保证人民用药有效安全
[判断题]( )前照灯高压放电氙灯泡在发光效率上不如卤素灯泡。
A.正确
B.错误
[单项选择]One of the most important features that distinguish reading from listening is the nature of the audience. (67) the writer often does not know who will read what he writes, he must (68) to be as clear as possible. Time can be taken to plan the piece of writing so that it is eventually organized into some sort of (69) sequence of events or ideas. When we speak, however, we normally have very little time to plan what we (70) to say. Since we are actually (71) our audience face to face we may (72) some of the information we believe our audience shares. And the more (73) we are with our audience, the more information we are likely to leave out. In any (74) they can always stop and ask a question or ask for (75) if we have left out too much. A reader, however, cannot do this but can at least attempt comprehension at his own speed; (76) , he can stop and go backwards or forwards, <
A. run
B. sort
C. fill
D. count
[判断题]侧墙卷材防水层的保护层与防水层应黏结牢固,结合紧密,厚度均匀一致。( )
[多选题]二级允许担当的工作各种地面上的作业。()(1分)
A.不拆卸零件的高空作业(如清扫绝缘子、支柱涂漆、)
B.不拆卸零件的高空作业(如涂号码牌)
C.不拆卸零件的高空作业(如验电、装设接地线、作业车巡检等)
D.巡视工作
[单项选择]第三次信息技术革命指的是()。
A. 互联网
B. 物联网
C. 智慧地球
D. 感知中国
[简答题]甲、乙两港相距720千米,轮船往返两港需要35小时,逆流航行比顺流航行多花5小时,帆船在静水中每小时行驶24千米,问帆船往返两港需要多少小时?
[单选题]APU虹吸式引气作用包括
A.仅冷却滑油系统
B.仅冷却APU舱
C.既可以冷却滑油系统、也可以冷却APU舱
D.以上说法均不正确
[单选题]直流电机的感应电动势E=CeΦn,这里的Φ指( )。
A.A.主磁通
B. B.漏磁通
C. C.气隙中的合成磁通
[判断题]为敌人指示轰击目标,是间谍罪的行为表现之一。
A.正确
B.错误
[单选题]有导电粉尘及产生易燃易爆气体的危险作业环境,必须采用( )的电气设施。
A.开启式的配电箱
B.封闭式的配电箱
C.密闭式或防爆式配电箱
[单选题]肺结核原发综合征的临床特异性体征是
A.病灶常为多结节性
B.原发灶、淋巴管炎及肺门淋巴结炎
C.肺内可有一个或多个空洞病灶
D.病灶位于锁骨上、下区
E.肺内常见结核球
[单项选择]当人处于炎热环境时,会引起()
A. 冷觉感受器兴奋
B. 温觉感受器抑制
C. 下丘脑体温调节中枢兴奋
D. 甲状腺激素分泌量增加
[判断题]重要客户现场安全检查宜使用低压工作票。
A.正确
B.错误