热门试题:
[单项选择]伤寒病人最严重的并发症是（）。
A. 肠出血
B. 肠穿孔
C. 中毒性心肌炎
D. 伤寒肝炎
E. 肺炎
[单选题]事故调查组人数通常为,一般事故()人
A.3
B.4
C.5
D.6
[判断题]依据《工作票实施规范(发电、变电部分)》(Q/CSG 1205005—2016)5.3、5.4规定:厂站第一种工作票的备注栏可填写因设备试验等原因进行的安全措施临时变更及恢复情况(需工作许可人和工作负责人签名确认及时间)。( )
A.正确
B.错误
[单选题]电气化铁路区段车站风雨棚、跨线桥、隧道等构建物距牵引供电设备（ ）米范围内不得出现漏水、悬挂冰凌等现象。
A.2
B.3
C.4
[单选题] 托运行李体积每件不能超过( )厘米
A.20×40×55厘米
B. 20×40×60厘米
C.．60×80×100厘米
D. 40×60×100厘米
[单选题]信号微机监测系统滚动数据存储时间大站不少于( )。 ( )
A.16h
B.24h
C.36h
D.48h
[单选题]现场勘察工作由（）组织。
A.工作票签发人或工作负责人
B.工作票签发人或工作许可人
C.工作许可人或工作负责人
D.工作票签发人或专责监护人
[单项选择]甲公司向公安机关报案，称高某利用职务便利侵占本公司公款320万元。侦查机关在侦查中发现，高某有存款380万元，利用侵占的公款购买的汽车1部和住房1套，还发现高某私藏军用子弹120发。公安机关对于上述财物、物品所做的下列哪种处理是错误的
A. 扣押汽车1部
B. 查封住房1套
C. 扣押子弹120发
D. 冻结存款380万元
[单选题] 为肝性脑病患者灌肠时,应选用的溶液是( )
A.温水
B.生理盐水或弱酸性溶液
C.2%碳酸氢钠溶液
D.肥皂水
E.苏打水
[简答题]作业安全距离不够且未采取有效措施是Ⅰ类严重违章。
[多项选择]烧伤瘢痕的非手术治疗方法包括（）
A. 激光
B. 弹力套
C. 瘢痕贴
D. 瘢痕内注射曲安奈德
E. 皮肤软组织扩张器
[单选题]线路允许速度为120km/h(不含)～160km/h的正线道岔(直向)与曲线超高顺坡终点之间的直线段长度，一般情况下不应小于（ ）。
A.70m
B.60m
C.40m
D.30m
[不定项选择题]共用题干
New Understanding of Natural Silk's Mysteries
Natural silk,as we all know,has a strength that man-made materials have long struggled to match.In a
discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT re-
searchers have discovered that silk gets its strength from its weakness.Or,more specifically,its many weak-
nesses. Silk gets its extraordinary durability and ductility（柔韧性）from an unusual arrangement of hydrogen
bonds that are intrinsically very weak but that work together to create a strong,flexible structure.
Most materials一especially the ones we engineer for strength一get their toughness from brittleness.As
such,natural silks like those produced by spiders have long fascinated both biologists and engineers because of
their light weight,ductility and high strength(pound for pound,silk is stronger than steel and far less brittle).
But on its face,it doesn't seem that silks should be as strong as they are;molecularly,they are held together by
hydrogen bonds , which are far weaker than the covalent（共价的）bonds found in other molecules.
To get a better understanding of how silk manages to produce such strength through such weak bonds,
the MIT team created a set of computer models that allowed them to observe the way silk behaves at the
atomic level. They found that the arrangement of the tiny silk nanocrystals（纳米晶体）is such that the hydro-
gen bonds are able to work cooperatively,reinforcing one another against external forces and failing slowly
when they do fail,so as not to allow a sudden fracture to spread across a silk structure.
The result is natural silks that can stretch and bend while retaining a high degree of strength.But while
that's all well and good for spiders,bees and the like,this understanding of silk geometry could lead to new
materials that are stronger and more ductile than those we can currently manufacture.Our best and strongest
materials are generally expensive and difficult to produce(requiring high temperature treatments or
energy-intensive processes).
By looking to silk as a model,researchers could potentially devise new manufacturing methods that rely
on inexpensive materials and weak bonds to create less rigid,more forgiving materials that are nonetheless
stronger than anything currently on offer. And if you thought you were going to get out of this materials
science story without hearing about carbon nanotubes（纳米碳管）, think again. The MIT team is already in
the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural
silk-like carbon nanotubes. Super-silks are on the horizon.
Biologists and engineers are interested in understanding natural silks because they are very light and brittle.
A.Right
B.Wrong
C.Not mentioned
[单项选择]在合同履行期限届满之前，当事人一方明确表示或者以自己的行为表明不履行合同义务的行为称为（ ）。
A. 实际违约
B. 预期违约
C. 不可抗力
D. 解除合同
[单选题]对于查验结果为不合格或假冒绿通车的车辆，应对不合格或假冒具体情况进行拍照取证，相关证据影像记录资料在收费公路经营管理单位本地保存期不得少于( )。
A.3年
B.1年
C.6个月
D.3个月
[单项选择]两个或两个以上公民或产权主体对同一房屋客体共同享有一个完全产权，即享有房屋的（）
A. 区分所有权
B. 共有产权
C. 不同产权
D. 独立产权
[单选题]是由于基床土质不良，在列车荷载作用下液化成泥浆，由于荷载的反复作用形成抽吸作用，泥浆受挤压向上冒出，进而形成（）。
A.滑坡
B.泥石流
C.塌方
D.翻浆冒泥
[单选题]要保持立体层次感,插制时必须注意造型的空间结构关系,( )各部分之间的分布关系,应高低错落.疏密有致。
A.容器
B.花枝
C.花泥
D.花插
[单项选择] The most important step in developing an effective campaign, and the step which must come before all others, is to define the objectives of the campaign with greatest possible clarity. Does the company wish to attract new investors Does it seek to acquire a company abroad Is a new product to be introduced
Are new government regulations threatening the company’’s profitability Only after the fundamental needs of a corporation have been established can the basic objective for a corporate program be isolated; without such a clearly defined objective the campaign will have little effect.
Note that we have spoken of "an objective," not a set of objectives. One cannot create a favorable climate among the financial community, emphasize one’’s concern for the environment, seek to attract new employees by the creation of a progressive image, give direct support to sales staff, and emphasize social responsibility, all in a single campaign. A scattering of diverse messages will con
A. Explain too much with no figures and facts.
B. Emphasize the details without illustration.
C. Explain nothing about the objectives.
D. Illustrate too few detailed data.
[判断题]双鼠笼式或深槽式电动机最大的特点是启动性能好。（）[1.0分]
A.正确
B.错误
[单项选择]以下对RBS200的TX-BUS与INTERNAL TX-BUS的描述，哪项是错误的？（）
A. TX-BUS将脉冲串送各个RTX，INTERNALTX-BUS送脉冲串至RRX，实现收发同步。
B. TX-BUS是TG中的外部总线，INTERNALTX-BUS是TG中的内部总线。
C. 如果不开跳频，可以不用接RTX上的TX-BUS。
D. RTX依据脉冲串中的串头频率信息来选择脉冲串，且由BBX来执行。
[单项选择]下列各项中，通过营业外支出核算的有( )。
A. 结转出租、出借包装物的成本
B. 结转对外出售不需用原材料的成本
C. 结转转让无形资产所有权的亏损
D. 结转随同商品出售单独计价的包装物成本
[简答题]使用中发生卡链情况，应将重物放下后方可检修。
[多选题]我国居民健康档案包括
A.个人健康档案
B.家庭健康档案
C.家族健康档案
D.社区健康档案
E.群体健康档案
[多项选择]关于招标控制价中“暂列金额”的说法，正确的有（）
A. 设计图纸详细深入的工程，可适当降低暂列金额
B. 复杂工程的暂列金额可适当提高
C. 暂列金额由材料暂估价和专业工程暂估价两部分组成
D. 暂列金额的估算要考虑工程环境条件
E. 暂列金额应根据拟采用的施工方案估算
[单选题]工作票由电力监控系统运维单位（部门）签发，也可由经电力监控系统运维单位（部门）审核批准的（）签发。
A.A.检修单位
B.B.使用单位
C.C.运维管理单位
D.D.施工单位
[简答题]简述我国古代四大亭的名称、地点、建筑年代及亭名的由来。
[单选题]在四显示自动闭塞区段，列车通过进站信号机显示一个黄色闪光和一个黄色灯光时，其限制速度为()。
A.50km/h
B.60km/h
C.75或80km/h
D.90km/h
[单选题] 网络品牌社区是以( )为核心主题而建立的网络论坛。
A.网友
B.产品
C.品牌
D.网游
[单项选择]
A. spiritual
B. material
C. economical
D. social
[判断题]《中华人民共和国消防法》是我国消防工作的最高法律。（）
A.正确
B.错误
[单项选择]夸美纽斯指出：“凡是需要知道的事物，都要通过事物本身来进行教学；那就是说，应该尽可能地把事物本身或代替它的图像放在面前，让学生去看看、摸摸、听听、闻闻等等。”乌申斯基进一步指出：“一般说来，儿童是依靠形式、颜色、声音和感觉来进行思维的。”“逻辑不是别的东西，而是自然界里的事物和现象的联系在我们头脑中的反映。”这就要求我们在教学中要重视运用( )
A. 直观性原则
B. 巩固性原则
C. 量力性原则
D. 教育适应自然性原则
[单项选择]小陈于2006年由某省甲县乙乡考入邻省丙市丁大学应征入伍。2009年小陈退伍后无意继续上学。根据现行规定，小陈应当由( )安置工作。
A. 甲县退伍军人安置机构
B. 乙乡人民政府
C. 丙市退伍军人安置机构
D. 丁大学有关部门
[单项选择]字词概念理解能力发展的转折点出现在（）。
A. 小学六年级
B. 初中一年级
C. 初中二年级
D. 初中三年级
[判断题]使用绞磨工作，在必要时宜搭设防护工作棚，操作位置应有良好的视野。
A.正确
B.错误
