热门试题:
[判断题]电流截止负反馈是一种只在调速系统主电路过电流下起负反馈调节作用的环节,用来限制主回路过电流。
A.正确
B.错误
[判断题]现场维修人员可以随意调整电动转辙机摩擦力.( )
A.正确
B.错误
[不定项选择题]共用题干
赵某拥有存款50万元,为实现居住私密性好、生活和学习方便的愿望,通过置业担保公司取得银行贷款50万元,购买了一套建筑面积为120 m2、三室二厅、售价为80万元的商品住宅。赵某购房后又投入20万元进行了装修并向保险公司购买了房屋火灾保险,与保险公司签订了定值保险合同,确定保险标的价值90万元。不料当年发生了事故,经现场查看认定保险标的损失比例为20%,该损失应由保险公司理赔。根据以上内容,回答96~100题。
如果该居住区买房与租房的比例是7:3,该指标按其性质为( )。
A.结构相对指标
B.比较相对指标
C.强度相对指标
D.比例相对指标
[判断题]晶闸管整流电路中过电流的保护装置是快速熔断器,它是专供保护半导体元件使用的。
[判断题] 若工作需要(如测量极性、回路导通试验等),且现场设备具体情况允许时,不可以准许工作班中有实际经验的一人或几人同时在他室进行工作。( )
A.正确
B.错误
[单项选择]某“城中村”聚居了大量外来人口,最近有居民反映,有部分租户图方便将杂物随意堆放,导致社区存在较大的火灾隐患,社会工作者拟采用地区发展模式开展服务,其基本假设是()
A. 政府向该社区投入的消防资源不足
B. 该社区房东和租户的利益冲突较大
C. 该社区居民有解决火灾隐患问题的潜力
D. 该社区火灾隐患可以通过渐进方式解决
[判断题]政府信息公开工作年度报告应当包括政府信息公开工作存在的主要问题及改进情况。
A.正确
B.错误
[单选题]100kg重的灯具固定及悬吊装置,做恒定均布载荷强度试验的重量是( )。
A.100kg
B.200kg
C.300kg
D.500kg
[简答题]62) The method of scientific investigation is nothing but the expression of the necessary mode of working of the human mind; it is simply the mode by which all phenomena are reasoned about and given precise and exact explanation. There is no more difference, but there is just the same kind of difference, between the mental operations of a man of science and those of an ordinary person, as there is between the operations and methods of a baker or of a butcher weighing out his goods in common scales, and the operations of a chemist in performing a difficult and complex analysis by means of his balance and finely graded weights. It is not that the scales in the one case, and the balance in the other, differ in the principles of their construction or manner of working; but that the latter is much finer apparatus and of course much more accurate in its measurement than the former.
You will understand this better, perhaps, if I give you some familiar examples. 63) You have
[多选题]二号线FAS工作站软件中PC Monitor都有“ ”功能?
A.启动WorkStation软件
B.导入系统数据
C.还原系统数据
D.恢复系统数据
[单选题]患者,男性,30岁,表现为贫血、出血、高热,以“急性白血病”入院。在向患者及家属解释出现发热的主要原因,正确的是
A.坏死物质被吸收
B.严重出血
C.核蛋白代谢亢进
D.感染
E.抗原-抗体反应
[多选题]陈云在中共八大提出了关于社会主义经济制度实行“三个主体,三个补充”的设想,下列选项属于“三个补充”的是( )。
A.个体经营
B.自由生产
C.自由市场
D.手工业生产
[单选题]线路10kV的理论线损率与( )没有太多关系。
A.导线截面积
B.电流大小与分布
C.线路长度
D.专变型号
[单选题]在《登高作业管理规定》中规定,登高作业是指在()米以上有可能造成坠落事故的高度上进行的。(单选题)(1分)
A.1
B.2
C.5
D.10
[判断题]确定设备不带电时,作业人员可临时跨越安全围栏进行工作
A.正确
B.错误
[单选题]( )适用于高含硫、溢流量大的条件,优点是避免有毒有害气体对装备和人员的伤害、减少操作难度提高压井成功率、所需要压井装备也比较简单。
A.压回法
B.反循环压井
C.正循环压井
D.体积法压井
[单项选择]When is dock survey carried out?()
A. During annual repair
B. Usually during dock repair
C. Before sea trial
D. After 5 years from last annual survey
[单项选择]毒性中药是指()。
A. 可成瘾的中药
B. 副作用大的中药
C. 作用剧烈的中药
D. 有刺激性的中药
E. 毒性剧烈,治疗量与中毒量相近,使用不当会致人中毒或死亡的中药
[单项选择]海洋表层的运动主要受海平面风的牵制。信风的存在使得大量暖水被吹送到赤道西太平洋地区,而赤道东太平洋地区暖水被刮走后,主要靠海面以下的冷水进行补充,因此,赤道东太平洋海温比西太平洋海温明显偏低。当信风加强时,赤道东太平洋深层海水涌升上翻现象更加剧烈,导致海表温度异常偏低,使得气流在赤道太平洋东部下沉,而气流在西部的上升运动更为加剧,有利于信风的加强,这进一步加剧了赤道东太平洋冷水的发展,引发了所谓拉尼娜现象。
这段文字主要谈的是______。
A. 海表运动与信风的关系
B. 赤道东西太平洋海温差异的原因
C. 拉尼娜现象的形成原理
D. 信风的存在对海温的影响
[不定项选择题]共用题干
Cloning(克隆):Future Perlect?
1 A clone is an exact copy of a plant or animal produced from any one cell.Since Scottish
scientists reported that they had managed to clone a sheep named Dolly in 1997,research
into cloning has grown rapidly.In May 1998,scientists in Massachusetts managed to
create two identical calves(牛犊)using cloning technology. A mouse has also been
cloned successfully.But the debate over cloning humans really started when Chicago
physicist Richard Seed made a surprising announcement:"We will have managed to clone
a human being within the next two years."he told the world.
2 Seed's announcement provoked a lot of media attention,most of it negative,In Europe,
nineteen nations have already signed an agreement banning human cloning and in the
U.S. the President announced:"We will be introducing a law to ban all human cloning and
many states in the U. S. will have passed anti-cloning laws by the end of the year."
3 Many researchers are not so negative about cloning.They are worried that laws banning
human cloning will threaten important research.In March,The New England Journal of
Medicine called any plan to ban research on cloning humans seriously mistaken.Many
researchers also believe that in spite of attempts to ban it,human cloning will have become
routine by 2010 because it is impossible to stop the progress of science.
4 Is there reason to fear that cloning will lead to a nightmare world?The public has been
bombarded(轰炸)with newspaper articles, television shows and films, as well as
cartoons.Such information is often misleading,and makes people wonder what on earth
the scientists will be doing next.
5 Within the next five to ten years scientists will probably have found a way of cloning
humans.It could be that pretty soon we will be able to choose the person that we want our
child to look like,But how would it feel to be a clone among hundreds,the anti-cloners
ask. Pretty cool, answer the pro-cloners(赞成克隆的人).
Richard Seed claimed to be able to clone_______.
A.the nucleus of a cell
B.cloned human beings
C.a human being in two years
D.a law to ban human cloning
E.a report on human cloning
F.heavy media coverage
[单选题]并联电容器组新装投运前,在额定电压下合闸冲击( )次,每次合闸间隔时间5分钟。
A.1
B.2
C.3
D.5
[填空题]岗前5分钟思考法(),()1分钟思考潜在危害(),1分钟思考逃生方法。
[判断题]判断题
当带电体有接地故障时,离故障点越远,跨步电压触电的危险性 越大。
正确
错误
A.正确
B.错误
[单项选择]无色注射液或滴眼剂灯检时,光照度应为()lx
A. 1000~1500
B. 1500~2000
C. 2000~3000
D. 2500~3000
[填空题]大学生泽偶主要三大原则:首先考虑与自己某些方面相似的人,既()原则;人生理想、奋斗目标、人生态度与自己相同,即()原则;个性方面互补,即()原则。
[单选题]《铁路货车运用维修规程》由()负责解释
A.铁路总公司机务部
B.铁路总公司运输部
C.铁路总公司车辆部
D.铁路总公司机辆部
[判断题]专责监护人不准兼做其他工作。
A.正确
B.错误
[判断题]施工封锁时间内,线路清筛地段、起道地段、细整地段应按照二捣一稳作业工艺要求执行。
A.正确
B.错误
[简答题]当输入额定电压,变压器空载时,其二次端子电压的误差不大于端子额定电压值的±()%。
[单选题]渗漏控制的方法必须与渗漏水的()和特定库区场地条件相适应。
A.理化特性
B.物理特性
C.化学特性
[单项选择]调节阀有两个阀芯和阀座是().
A. 直通单座
B. 套筒阀
C. 直通双座
D. 套筒
E. 蝶阀
[单选题]当触电人有呼吸但心跳停止时,应立即采用()进行抢救。
A.A、人工呼吸
B.B、胸外心脏按压
C.C、人工呼吸和胸外心脏按压
D.D、送医院救护
[单项选择]目前大型火力发电厂锅炉的主要形式为()。
A. 层燃炉
B. 室燃炉
C. 旋风炉
D. 流化床锅炉
[单选题]使用过的餐饮具和茶具如何清洁?
A.A.物理消毒,煮沸15-30min,或用高温消毒柜消毒
B.B.简单冲洗下
C.C.不消毒
D.D.以上都不对
[单选题]
船舶在供油、受油作业中检查项目包括_______。
①输油管是否完好
②输油管是否接妥,并在结合处放置了集油容器 ③主甲板的泄水孔是否己堵塞
A.
①②③
B.
①②
C.
②③