热门试题:
[单项选择]任何一种窒息性气体的主要致病环节是
A. 缺氧
B. 呼吸困难
C. 昏迷
D. 刺激
E. 变性血红蛋白症
[单选题]恐怖主义，是指通过（ ）、破坏、恐吓等手段，制造社会恐慌、危害公共安全、侵犯人身财产，或者胁迫国家机关、国际组织，以实现其政治、意识形态等目的的主张和行为。
A.权利
B.武力
C.暴力
D.非法
[单项选择]某零件年需要量18 000件，日供应量90件，一次订货成本25元，单位储存成本10 元/年。假设一年为360天。需求是均匀的，不设置保险库存并且按照经济订货量进货，则下列各项计算结果不正确的是( )。
A. 经济订货量为450件
B. 最高库存量为200件
C. 平均库存量为200件
D. 与进货批量有关的总成本为2 000元
[判断题]站内线路、道岔发生故障时，应立即通知工区工班长。
A.正确
B.错误
[单选题]氧气瓶、乙炔气瓶应分开放置,间距不得少于( )米。
A.1;
B.3;
C.5;
D.10。
[单项选择]对长期反复使用、加工大批量零件的情况，以配备（）刀柄为宜。
A. 整体式结构
B. 模块式结构
C. 增速刀柄
D. 内冷却刀柄
[判断题]作业人员撤离电缆井或隧道后，应立即将井盖盖好。
A.正确
B.错误
[单选题]安全检查不包括( )等形式。
A.员工抽查
B.班组日常检查
C.定期检查
D.专项检查
[多项选择]常用的减压阀有（）。
A. 弹簧薄膜式；
B. 活塞式；
C. 波纹管式；
D. 电动式。
[单选题]调车作业中,在空线上牵引运行时,不准超过 ( )km/h
A. 20
B. 30
C. 40
D. 45
[判断题]在有可燃气体.蒸气和粉尘并可达到爆炸浓度的房间内安装的风机应选择防爆型。
A.正确
B.错误
[填空题]Want a longer life Volunteer to do good and you might benefit at least as much. Visiting the sick, feeding the hungry and (36) that committee no one else wants to touch are morally admirable—but being (37) can also be good for both body and soul.
A new review of the health effects of volunteering found that helping others on a (38) basis—like serving food in a soup kitchen or reading to the blind—can reduce early (39) rates by 22%, compared to those in people who don’t participate in such activities.
The review, which included 40 studies and was published in BMC Public Health, also revealed that volunteers benefit from reduced rates of (40) and an increased sense of life satisfaction and well being—doing good, it seems, made them feel good. "Our systematic review shows that volunteering is associated with improvements in health," lead author, Dr. Suzanne Richards of the University of Exeter Medical School in England,
[判断题]矿用本质安全输出直流电源应具有的主要功能包括： 输入、 输出电源指示功能； 限流、限压和短路保护功能。
A.正确
B.错误
[多选题]导致零件变形的因素有()。
A. 零件所受载荷在内部产生的内应力超过零件材料的弹性极限
B. 零件在制造和加工过程中产生的残余内应力足够大
C. 零件受到变化的不均匀的冲击较大时
D. 零件受热不匀而产生的热应力足够大
[单项选择]某慢性心功能不全患者表现为夜间阵发性呼吸困难、尿量减少等症状，给予药物治疗后，上述症状好转，但是出现心慌、恶心、呕吐、食欲不振、头晕头痛、黄视、视物模糊等，应考虑为（ ）
A. 慢性心功能不全症状反复
B. 利尿剂的副作用
C. 洋地黄药物中毒
D. 扩血管药物的不良反应
E. 洋地黄药物用量不足
[单选题]一共大概有多少战士反抗那次由彼得留拉残匪和驻华沙的外国使团组织的暴动？（）
A.200
B.300
C.400
D.500
[多项选择]财产所有权的权能是指对财产的( )。
A. 占有权
B. 使用权
C. 经营权
D. 收益权
E. 处分权
[单选题]宪法是国家的根本大法。下列哪个不是我国现行宪法的基本原则（ ）
A.三权分立原则
B.民主集中制原则
C.社会主义法制原则
D.保障公民权利和义务的原则
[判断题]预铺道岔整组道岔要搭设7~9个架台，架台枕木垛间距一般为( )m。
A.正确
B.错误
[单选题]握手应由主人、年长者、( )和妇女先伸手。
A.年轻者
B.男士
C.身份低者
D.身份高者
[多选题]下列关于值班信息报送的说法正确的是( )。
A.要认真收集、编写、报送
B.初次报告要快(可先报事、再报情)
C.补报、续报要新
D.总结报告要全
E.报告内容要准确
F.严禁迟报、漏报、误报
[单选题]TCP的中文含义是______。
A.网络互连协议
B.传输控制协议
C.内部协议
D.信息协议
[多选题]调控机构调管的继电保护和安全自动装置、稳定控制系统（装置），在新投入或经过更改时，运行值班人员应与定值更改人员逐项核对定值及有关运行注意事项，并和相应调控机构的值班调度员进行定值通知单编号、定值更改结论的核对，无误后方可投入。现场定值更改人员、运行值班人员核对定值单后应在打印的定值清单上（）等信息，并及时将回执送达整定部门。
A.签名
B.打钩
C.注明变比
D.核对时间
E./
F./
G./
H./
[判断题]硬盘无法启动的原因一般是CMOS中的硬盘设置参数丢失或硬盘类型设置错误造成的。
A.正确
B.错误
[单选题]在正常情况下进站、通过、接近、遮断信号机的显示距离，不得小于( )m。
A.600
B.800
C.1000
[判断题]啮合传动部位的故障特征是磨损、破损、发热、异响、位移。（易）
( )
A.正确
B.错误
[多选题] 动铁心式弧焊变压器的型号是( )。
A.BX3-120
B.BX3-400
C.BX1-135
D.BX1-330
[单选题]气象信息综合服务系统中的通信系统对（ ）的信息接收、存储、转发。
A.自动观测系统
B.气象雷达系统
C.卫星云图接收处理系统
D.民航转报系统
[填空题]
Blogging
Blogging is growing and for very good reasons, much like e-mail took off ten years ago. And like ten years ago when I found myself repeatedly trying to explain e-mail to people and why they really did need an e-mail address, now I’m explaining blogging and why it matters.
What Is Blogging The act of producing a blog. What’s a blog That’s a little bit harder to answer. The term blog is short for web log, a "log" of diary-like entries published on a website. This is how it started, people publishing their daily thoughts for all to read on their website. Sometimes new entries are produced every few minutes, and sometimes just once and a while. It all depends on the author and what she or he wants to express.
But blogging has evolved to mean much more than diary entries. Blogging is easy, almost instant, publishing of content to a website, where every entry is preserved in a database and is t
[单项选择]When Marine Lt. Alan Zarracina finally did the splits after months of struggling with the difficult pose in yoga class, the limber women around him applauded.
Zarracina, a 24-year-old Naval Academy graduate and flight student, admits he would have a hard time explaining the scene to other Marines. Each class ends with a chant for peace. Then, instructor Nancy La Nasa hands students incense sticks as a gift for their 90 minutes of back bends, shoulder stands and other challenging positions. Zarracina has tried to drag some of his military friends to class, but they make fun of him. "It’s not necessarily considered masculine," he said.
Still, the popular classes, based on ancient Hindu practices of meditation through controlled breathing, balancing and stretching, are catching on in military circles as a way to improve flexibility, balance and concentration. A former Navy SEAL told Zarracina about the class.
The August edition of Fit Yoga, the nation’s second-largest yoga
A. has been popular ever since its advent in India.
B. is an ancient Hindu practice of meditation.
C. focuses on improving muscular strength.
D. is becoming increasingly popular among soldiers.
[单选题] 进行人工呼吸和心脏按摩时,在以下（）情况下可以停止进行。
A.操作人员疲劳的；
B.患者有一定反应；
C.呼吸和心跳均得到充分恢复；
[多选题]预防直接接触电击的正确措施有（）。
A.保护接地
B.保护接零
C.绝缘
D.屏护
E.间距
[多项选择]属于由省级烟草专卖行政主管部门作废烟草专卖品准运证情形的，申办人应提交以下哪些材料（）。
A. 申明作废理由并加盖本单位公章的书面申请
B. 需方单位出具的未收到该份烟草专卖品准运证所记载烟草专卖品的证明材料
C. 所在地市级烟草专卖行政主管部门的审查意见
D. 因工作人员工作失误造成准运证作废的，应写出书面检查并由单位领导签署意见
[单选题]206．（ ）将交流电源转换成-48V的直流电源，为通信设备提供电源。
A.高频开关电源
B.UPS电源
C.逆变器
D./变换器
[单项选择]病原菌检测中，不属于SPF级小鼠必须检测项目的是：（）
A. 金黄色葡萄球菌
B. 肺炎克雷伯杆菌
C. 肺炎链球菌
D. 沙门菌
