热门试题:
[判断题]起钻挂上排档后，先挂总离合器，再遁形滚筒离合器，并同时松刹车，并将油门加大，不准先挂离合器后松刹车。()
A.正确
B.错误
[简答题]非高站台安全标线与站台边缘距离是怎么规定的？
[单选题]CTCS3-300T车载系统的安装,如果部件通过连接销连接时,使该连接销暴露于静电放电( )中,则部件将可能被损坏。
A.ESA
B.ESB
C.ESC
D.ESD
[单选题]无人机在增稳飞行控制模式下,飞控子系统控制。
A.参与
B.不参与
C.不确定
[单选题]事故调查时限通常为，重大事故( )日。
A.10
B.15
C.20
D.30
[判断题]113.更换机车闸瓦作业中，严禁移动自阀或单阀手柄并挂好禁动牌。
A.正确
B.错误
[判断题]公务型旅游指出于职业的需要,以办展览,进行贸易和商务洽谈,出席会议或进行某些科学文化交流为主要目的的旅游项目。这类旅游的特点是在完成公务的同时,进行参观游览。____
A.正确
B.错误
[简答题]在焓湿图中只要知道（）个独立参数，就可以确定空气状态及其他参数；
[单选题]智能电能表断电后，其内部的时钟电池应维持内部时钟正确工作时间累计不少于（ ）年。
A.6
B.10
C.8
D.5
[判断题]对骗取国家出口退税款的，由省级以上（含本级）税务机关批准，按规定停止其出口退（免）税资格，停止办理出口退税的时间以省级以上（含本级）税务机关批准后作出的《税务行政处理决定书》的决定之日为起始日。
A.正确
B.错误
[单项选择]对ARDS的诊断和病情判断有重要意义的检查是
A. 血气分析
B. X线检查
C. 心电图检测
D. 呼吸功能检测
E. 血流动力学监测
[单选题]A.急性肾小球肾炎
A.急进性肾小球肾炎
B.肾病综合征
C.隐匿性肾炎
D.慢性肾炎
E.反复浮肿多年，高血压，尿蛋白++，红细胞++( )
[单选题]当两台 BGP 邻居协商的 Hold Time 参数为 0 时，则不发送 Keeplive 报文。
A.正确
B.错误
[单选题]反射弧包括 ( )
A.感受器
B.效应器
C.神经中枢
D.传出神经
E.以上都是
[单选题]工作面出现异常气味，如煤油味，汽油味，松节油或焦油味，表明风流上方存在（ ）.
A.瓦斯突出
B.顶板冒落
C.煤炭自燃
D.煤尘
[多选题]灭火救援业务训练的组织形式、方法与要求,主要是依据( )等情况而确定的。
A.训练的基本规律
B.训练对象的实际情况
C.训练设施的配置
D.训练的效果
[多选题]下列哪些项目可作为诊断慢性肺心病的条件()
A.肺动脉高压表现
B.慢性肺、胸疾病史
C.右室肥大或右心衰竭
D.左室肥大或左心衰竭
E.以上都不是
[多选题]同一变电站内在几个电气连接部分上工作，同时符合下列（）的工作，可以使用一张第二种工作票。
A.依次进行
B.不停电
C.同一天
D.同一类型
[多项选择]甲建设单位与乙材料供货商签定了供货合同，合同中约定，乙供货商将甲建设单位所购买的部分货物直接运至丙施工单位。
按照我国《合同法》的规定，债务人转移债务应同时具备的条件有( )。
A. 债务人与第三人之间达成协议
B. 通知债权人
C. 经债权人同意
D. 征得法定代表人同意
E. 债务人必须一次全部转让
[单项选择]The United States has historically had higher rates of marriage than those of other industrialized countries. The current annual marriage (21) in the United States—about 9 new marriages for every 1,000 people—is (22) higher than it is in other industrialized countries. However, marriage is (23) as widespread as it was several decades ago. (24) of American adults who are married (25) from 72 percent in 1970 to 60 percent in 2002. This does not mean that large numbers of people will remain unmarried (26) their lives. Throughout the 20th century, about 90 percent of Americans married at some (27) in their lives. Experts (28) that about the same proportion of today’s young adults will eventually marry.
The timing of marriage has varied (29) over the past century. In 1995 the average age of women in the United States at the (30) of their first marriage was 25. The average ag
A. unexpectedly
B. irregularly
C. flexibly
D. consistently
[单项选择]下列关于原始凭证输入的说法中，不正确的是( )。
A. 输入的有关原始凭证汇总金额与输入的记账凭证相应金额应当相等
B. 会计软件对已经输入但尚未审核的原始凭证应提供修改和审核的功能
C. 记账凭证审核通过或者登账后，对输入的相应原始凭证可以直接修改
D. 记账凭证审核通过或者登账后，对输入的相应原始凭证可以修改
[单选题]检修电源箱内应有（）电气示意图，明确空气开关及插座接线布置，级差配置
A.交流回路
B.直流回路
C.继保回路
D.检修回路
[多项选择]关于本杰明·布鲁姆的掌握学习理论，以下哪些说法是正确的？（）
A. 绝大多数差生是由于学习过程中的失误积累（未达到教学目标的日积月累）以及未能得到适当的教学条件和合理的帮助造成的
B. 学生学习能力呈正态分布
C. 大多数学生学习能力的差异，表现在学习速度的竞争上
D. 只有少数学生能够完全学会所教的东西
[单项选择]清末首任内阁总理大臣是______；最后一任内阁总理大臣是______。
A. 奕勖 翁同龢
B. 李鸿章 张之洞
C. 奕勖 袁世凯
D. 翁同龢 袁世凯
[单选题]TVDS轨边设备设置地点距客列检或库列检所在地车站原则上不低于（）km。
A.10
B.20
C.30
D.40
[单项选择]建设项目目标( )控制遵循控制循环理论，是一个动态循环过程。
A. 计划
B. 分解
C. 静态
D. 动态
[多项选择]气动夯管锤铺管施工的特点是( )。
A. 适于在岩层中铺管
B. 适于在土层中铺管
C. 适于在含卵石的土层中铺管
D. 铺管方向不好掌握
E. 对地表无隆起或沉降
[单项选择]2011年3月7日，全国妇联在人民大会堂隆重召开“创新争优巾帼建功全国三八红旗手(集体)表彰大会”。在表彰大会上，黑龙江省伊春市嘉荫县青山乡建华村村委会主任( )荣获“全国三八红旗手标兵”。
A. 杨玉玲
B. 杨扬
C. 师雷方
D. 赵翠娟
[单项选择]对于获得性泪溢，询问病史应注意
A. 有无泪囊炎
B. 局部用药史
C. 以上全是
D. 单侧或双侧泪溢史
E. 颜面中部外伤或鼻骨骨折史
[单选题]用以切断制动主管与空气制动机的通路的是（）。
A.折角塞门
B.球芯截断塞门
C.远心集尘器
D.制动软管
[单选题]列车不停站通过的规定错误的是 （ ）
A.列车不停站通过时，司机根据运用调度的命令执行。以人工驾驶模式操
作，并广播通知车上乘客；车站员工负责通知车站乘客
B.列车进行测试需要时
C.列车因故障或依照列车时刻表需要不停站返回车场时
D.载客列车因运作上的原因，如站台大客流等，特别安排不停站时
[单选题]消防员呼救器后场接收装置的接收延时时间为( )。
A.<5 s
B.<15 s
C.<30 s
D.<60s
[判断题]2.203. 第203题
高压输电线电感对电阻的比值大,时间常数大,短路时产生的电流和电压自由分量衰减较慢。为了保持系统稳定,长距离输电线的故障应尽快切除,其继电保护的动作时间一般要求在20~40ms。
A.正确
B.错误
[单选题]依据《国家电网公司输变电工程施工现场关键点作业安全管控措施》，建设管理单位对“现场施工管理混乱，拒不整改或多次整改仍达不到要求”“安全文明施工费挪作他用”的施工单位，或履责不到位的监理单位予以停工整顿、通报批评，对有关人员提出撤换、清除现场的建议。当符合违约解除合同条款时，发出解除合同通知，启动（）。
A.索赔程序
B.追责程序
C.诉讼程序
D.约谈程序
[单选题]混凝土枕垫板作业一般仅适用于( )。
A.经常保养和临时补修
B.综合维修
C.线路中修
D.线路大修
[判断题] 吊运氧气瓶、乙炔瓶等压力容器和危险品时,必须有安全措施。
A.正确
B.错误
[不定项选择题]共用题干
Learn about Light
1 .Ancient civilizations were amazed by the existence of light for thousands of years. The Greek philosophers believed that light was made up of countless,tiny particles that enter the human eye and create what we call vision. However,Empedocles and a Dutch scientist named Christian Huygens believed that light was like a wave. According to them,light spread out and travelled like a straight line. This theory was accepted during the 19th century.
2 .In 1905,Albert Einstein published a research paper in which he explained what is re-ferred to as the photoelectric effect. This theory explains that particles make up light.The particles Einstein was referring to are weightless bundles（束）of electromagnetic（电磁）energy called photons（光子）.Today,scientists agree that light has a dual（二重）nature一it is part particle and part wave. It is a form of energy that allows us to see things around us.
3 .Things that give off light are known as sources of light. During the day,the primary source of light is the sun. Other sources of light include stars,flames,flashlights,street lamps and glowing gases in glass tube.
4 .When we draw the way light travels we always use straight lines. This is because nor-mally light rays travel in a straight line. However,there are some instances that can change the path and even the nature of light. They are reflection,absorption,interference（干扰）, etc.
5 .Physicists have attempted to measure the speed of light since the early times. In 1849, Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror located kilometers away and placed a rotating cogwheel（旋转齿轮）between the beam and the mirror. From the rate of rotation of the wheel,number of wheel's teeth and distance of the mirror,he was able to calculate that the speed of light is 313 million meters per second. In a vacuum（真空）,however,the speed of light is 299,792,458 meters per second. This is about a million times faster than the speed of an airplane.
Paragraph 5______
A.How Is the Nature of Light Explained Today?
B.What Are Sources of Light?
C.How Did Physicists Measure the Speed of Light?
D.How Does Light Travel?
E.How Did People Think of Light Years Ago?
F.What Causes a Shadow?
