热门试题:
[判断题]采用电话闭塞法的区段原则上不组织小交路运行，采用电话闭塞法的边界车站不组织列车折返（终点站除外）。( )
A.正确
B.错误
[多选题]正弦交流电三要素的内容以及表示的含义是(____)。
A.最大值:是指正弦交流量最大的有效值
B. 最大值:是指正弦交流量最大的瞬时值
C. 角频率:是指正弦交流量每秒钟变化的电角度
D. 初相角:正弦交流电在计时起点t=0时的相位,要求其绝对值小于180°
[单项选择]（）年12月，朱棣下令设立了“天津卫”。
A. 1401
B. 1404
C. 1403
[单项选择]
One of our great symbols is the American flag, 13 red and white stripes corresponding to the number of original states on a rectangular piece of color, one comer blue with 50 white stars for 50 states.
You see the flag everywhere now, "what so proudly we hail." It means the World Trade Center happened to all of us. "We’re proud to be Americans," say flags on front porches in small towns across the country. Some homes seem to have been built to fly the flag. This wouldn’t be complete without it; just perfect. "We’re American too," say the flags inelegant glued to the city apartment windows. The declaration of patriotic intent is everywhere, the simplest as persuasive as the displays where one was considered not enough. Rockefeller Center with 150 beauties is in show business, a stirring sight although it’s unlikely that management there loves our country more than the owner of the smallest business, displaying just one.
A. happiness
B. mourn
C. frustration
D. pride
[单项选择]人工合成的有机污染物，每年被排放到环境中的数量有（）
A. 数千万吨，种类达几十万种
B. 数百万吨，种类达十万多种
C. 数十万吨，种类达数万种
D. 数万吨，种类达上万种
E. 数万吨，种类达数千种
[单项选择]（）的发明和使用，不但为广告提供了一种先进的传播手段，使它的传播范围得到空前的扩大。也打破了广告缓慢发展的状态，使广告在世界各地都出现了飞跃。
A. 报纸
B. 排字印刷
C. 招牌
D. 印刷术
[单项选择]机体对细胞内寄生虫的防御主要依靠（）
A. 中性粒细胞的吞噬作用
B. 细胞免疫
C. 抗体、补体的调理及溶菌作用
D. 特异性抗毒素（IgG类）的中和作用
E. 巨噬细胞的吞噬作用
[单选题]‘年9月28日起实施的车辆分公司《消防安全管理规定》中指出,在工作期间,( )将安全出口上锁。
A.随时
B.应当
C.可以
D.不应
[单选题]用绝缘棒拉合隔离开关、高压熔断器，或经动机构拉合断路器和隔离开关，均应戴（ ）。
A.线手套
B.防毒面具
C.护目镜
D.绝缘手套
[单选题]标准预防强调：（ ）。
A.A.主要保护病人
B.B.主要保护医护人员
C.C.保护抵抗力差的病人
D.D.保护病人和医护人员
[判断题] 油水井堵水可分为选择性堵水和非选择性堵水。
A.正确
B.错误
[单项选择]主数据文件的推荐扩展名为______。
A. .mdf
B. .cdf
C. .ldf
D. .ndf
[单选题]绝缘轨距块共有（）种规格
A.8
B.9
C.10
D.11
[单项选择]机车连挂时保持一定的连挂速度，在《技规》允许的连挂速度内，利用一定的动能冲击确保（）落槽锁闭。
A. 钩舌
B. 防跳穿销
C. 钩锁铁
[单选题]从业人员在回采工作面行走时，不得进入( )。
A.采空区
B.支架下
C.避难硐室
[单选题]It is generally agreed that the first true cities appeared about 5,000 years ago in the food-producing communities of the Middle East． The cities of Sumeria, Egypt and the Indus Valley possessed a number of characteristics that distinguished them as truly urban． The cities were very much larger and more densely populated than any previous settlement, and their function wasclearly differentiated from that of the surrounding villages． In the cities the old patterns of kinship relations were replaced by a complex hierarchy of social classes based on the specialization of
labor． Moreover, the need to keep records led to the development of writing and arithmetic, and the increased sophistication of urban society gave a new impetus to artistic expression of every kind．
When the basis of city life was established in Europe the urban tradition was drawn from the ancient cities of the Middle East, via the civilization of Greece and Rome． We can trace three main phases in the growth of the West European city． The first of these is the medieval phase which extends from the beginning of the 1 lth century
A．
D． to about 1,500 to the beginning of the 19th century． The third is the modern phase extending from the early 19th century to the present day．
Every medieval city began as a small settlement, which grew up round a geographical or cultural focal point． This would be a permanent structure such as a stronghold, a cathedral or a large church． In districts where travel and trade were well established, it might be a market, a river crossing, or a place where two or more trade routes met, in studies of urban geography the oldest part of town is referred to as the nuclear settlement． There are many small towns in Europe where it is still possible to trace the outline of the original nuclear settlement． It is, of course,
much more difficult to do this in the case if a large modern city which has grown to many times its original size．
?Which of the following statements is TRUE?
A.West European cities established their own urban traditions．
B.West European cities grew directly out of those in the Middle East．
C.Cities appeared earlier in the Middle East cities went through the same phases．
D.West European and Middle East cities went through the same phases．
[单项选择]老妇，65岁，2年前左股骨颈骨折，行内固定，一年后拔钉，半年来患髋痛，下蹲不便，跛行。骨盆照片，左髋间隙窄，股骨头不规则密度增高，塌陷，骨疏松。其最主要原因为（）
A. 损伤性骨化
B. 创伤性关节炎
C. 缺血性骨坏死
D. 老年骨质疏松
E. 疲劳骨折
[单选题]误码率是指收方接收到的()码元数在发方发出的总码元数中所占的比例。
A.失效
B.正常
C.错误
D.畸变
[单选题]在室外高压设备上工作，工作地点四周围栏上悬挂适当数量的（ ）标示牌，标示牌应朝向围栏里面。
A.“从此进出！”
B.“在此工作！”
C.“止步，高压危险！”
D.“禁止攀登，高压危险!”
[判断题]告知承诺书要求加盖单位的印章和法定代表人或者主要负责人的亲笔签名。
A.正确
B.错误
[判断题]依据GB/T6067.1—2010《起重机械安全规程 第1部分：总则》规定，指派人员应保证某些安全装备（例如安全帽和安全带）根据有关规定定期进行更换。由于撞击损坏的安全装备也应定期更换。
A.正确
B.错误
[单选题]右心房和胸腔大静脉的血压为
A.收缩压
B.舒张压
C.脉压
D.中心静脉压
[多项选择]影响房地产价格的经济因素具体是指（）。
A. 经济发展因素
B. 产业结构因素
C. 财政金融因素
D. 社会福利因素
[单项选择]休克治疗时应用血管活性药物的目的是（）
A. 升高血压
B. 提高组织器官的血液灌流
C. 提高心脏前负荷
D. 提高心脏后负荷
E. 增加心肌收缩力
[单项选择]非计划造成死亡、疾病、伤害、损坏或其他损失的意外事件，是（）。
A. 事故
B. 未遂事件
C. 事件
D. 不安全行为
[单项选择]Chief, I see that ship（）to her port.
A. turns
B. turning
C. to turn
D. be turning
[单选题]绝缘杆作业法断接引线登杆作业前,作业人员应检查脚扣、登高板和安全带并作()
A.耐压试验
B.冲击试验
C.型式试验
D.预防性试验
[简答题]
My eldest daughter l an Internet consultant, is only 30, but she has already lived in five different houses in five different places and has had about six different jobs. Every time I visit her, I notice how many new things there are in her house, and how many things lie unused, out of date. What is even more striking is how many things there are which are not expected to last -- disposable things. Disposable plates and glasses, disposable towels and babies’ nappies. It sometimes seems that we live in an age of the disposable.
46) This phenomenon of constant change runs through everything in life nowadays, from fashion to music, from medicine to motor cars, from education to employment. Two important factories seem to be driving these changes. The first is the rapid growth in knowledge and the consequent rapid development of technology. The second is the revolution in communications, which means that knowledge is spread faster and more widely than ever. Our t
[单项选择]肺动脉瓣位于（）
A. 平第4前肋或第3前肋间水平
B. 相当于第5肋软骨与胸骨右缘连接处
C. 在第4肋软骨与胸骨左缘连接处
D. 第3前肋水平
E. 第4前肋水平
[单项选择]玄参一等品要求每千克（）
A. 20支以内
B. 26支以内
C. 30支以内
D. 36支以内
E. 40支以内
[单选题]任何人员及所携带的物品与接触网设备带电部分，须保持( )以上的距离。(cg60)
A.1m
B.2m
C.1.5m
[判断题]自身耐受状态被破坏可导致自身免疫病。( )
A.正确
B.错误
[判断题]断题根据TSGT7001-2009《检规(简称)-曳引与强制驱动电梯》规定:轿顶装设了高于1.05m的护栏,可不设危险警示符号或须知。
A.正确
B.错误
[单选题]任意两点之间的高差与起算水准面的关系是()
A.不随起算面而变化
B.随起算面变化而变化
C.总等于绝对高程
D.无法确定
[单项选择]咨询公司为贷款银行的评估侧重于( )。
A. 项目的工艺方案、系统设计的可靠性和投资估算的准确性
B. 核算财务指标，进行敏感性分析
C. 项目可行性研究
D. 投资效益和风险分析
[判断题]核放射生命探测仪应避免存放于高温、潮湿的环境中，注意及时更换电池。（易）( )
A.正确
B.错误
