热门试题:
[判断题]变压器吊罩时，应将外罩放置在变压器（电抗器）外围干净支垫上，避免外罩直接落在铁芯上。必要时采取支撑固定等安全措施。（）
A.正确
B.错误
[单选题]用四爪单动卡盘装夹工件时，对已加工表面进行找正，一般采用（ ）
A. 千分尺
B.划线盘
C.卡尺
D. 百分表
[单选题]坠落高度基准面( )进行临边作业时,应在临空一侧设置防护栏杆,并应采用密目式安全立网或工具式栏板封闭。
A. 1m及以上
B. 2m及以上
C. 3m及以上
D. 4m及以上
[填空题]客运人员在接班前,必须充分休息,保持( )。严禁在接班前和( )饮酒。《管规》第128条
[判断题]业务系统下线后，所有业务数据应妥善保存或销毁
A.正确
B.错误
[多项选择]刘男与李女自由恋爱结婚后，生育一女。自从孩子出生之后，夫妻双方常因生活琐事发生争吵，而且刘男爱喝酒、赌博，很少照管孩子。对刘男的所作所为，李女感到实在是忍无可忍，于是，与刘男协商离婚，但遭到了拒绝。李女又向法院起诉，要求与刘男离婚。法院依法判决双方离婚，孩子由李女抚养，刘男每月付给抚养费300元，每周探望孩子一次。离婚之后，李女带着孩子与他人再婚。为了新的婚姻家庭关系的稳定，当刘男和其妹妹即孩子的姑姑探望孩子时，李女总是带着孩子躲藏起来。而刘男的父母即孩子的祖父母十分想念自己的孙女，也要求探望孙女。那么，依法不享有对孩子探望权的人是( )
A. 孩子的祖父
B. 孩子的父亲
C. 孩子的祖母
D. 孩子的姑姑
[单选题]医务人员对患者馈赠钱物当时难以谢绝的，必须于多长时间内上缴医院指定部门，由指定部门退还患者？( )
A.12
B.24
C.36
D.48
[单项选择]单凝聚法制备微囊时，加入的硫酸钠水溶液或丙酮的作用是
A. 助悬剂
B. 阻滞剂
C. 增塑剂
D. 稀释剂
E. 凝聚剂
[判断题]腐蚀性物质事故处置协助消防人员用生石灰和稀盐酸中和泄漏流入农田、公路、沟渠、低洼处的酸性和碱性腐蚀物质，减少对环境的污染。
A.正确
B.错误
[判断题]变压器油枕的作用是扩大散热面积，改善冷却条件。（ ）
A.正确
B.错误
[判断题]电费违约金是法定违约金，是维护供用电双方合法权益的措施之一。
A.正确
B.错误
[多选题]玻璃纤维增强酚醛树脂复合材料具有良好的耐腐蚀性，其使用场合是（ ）。
A.在含氯离子的酸性介质中使用
B.在碱性介质中使用
C.在含有盐的介质中使用
D.用于酯类和某些溶剂的管道
[单选题]国有资本、集体资本、非公有资本等交叉持股、相互融合的（ ）经济，是基本经济制度的重要实现形式。
A.国有制
B.混合所有制
C.私有制
D.集体制
[单项选择]可以作为一手住房贷款购房首付款证明的是（）。
A. 借款人存折
B. 开发商出具的正式发票
C. 建筑商出具的收据
D. 存入售楼员账户的汇款凭证
[单选题]关于印发《南昌铁路局动车组列车运行时车门发生故障客运应急处置规定》的通知（南铁客〔2017〕42号），遇有列车途中车门故障无法修复时，列车长应向司机和()报告，司机向列车调度员报告，客调通知前方列车停靠站故障车门的具体位置。
A.列车调度员
B.所在铁路局客调
C.车站客运员
D.车站值班员
[单选题]气焊焊接低碳钢用焊丝规格一般在( )。
A.φ0.5~φ1mm
B.φ2~φ4mm
C.φ4~φ5mm
D.φ5~φ6mm
[判断题]高压开关在合闸后,开关内部有严重的打火、放电等异常声音,应立即拉开,停电检查原因。( )
A.正确
B.错误
[填空题]员工休病假超过（）天（含），则需由员工家属或代办人在休假当日起的两个工作日内到中心和部门填写《请假单》，并提交相关休假证明材料，逾期则视为旷工。
[单项选择]氮质血症时，饮食因应限制( )
A. 碳水化物
B. 脂肪
C. 蛋白质
D. 钠盐
E. 纤维素
[多项选择]桥梁支座的作用有( )。
A. 调节梁体标高
B. 传递上部结构的支承反力
C. 保证受力主梁(结构)在外力作用下的自由变形
D. 方便梁体维修
[简答题]
{{B}}第一节
短文改错{{/B}}
此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个(√)；如有错误(每行只有一个错误)，则按下列情况改正：
多一个词：把多余的词用斜线(—)划掉，在该行右边横线上写出该词，并也用斜线划掉。
缺一个词：在缺词处加一个漏字符号(∧)，在该行右边横线上写出该加的词。
错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
Some American soldiers was marching forward among
snow-covered 76. ______
mountains.
As he could see nothing but snow, they soon became snow
77. ______
-blind. They had no choice but to stop
go forward under such a difficult 78.
______
condition. They put up the tent so as to spend the night there, but
hardly 79. ______
had they put up the tent when a gust of
wind sent the tent going far away 80. ______
As they had
never meet with such a problem, they didn’t know how
81. ______
to deal with it. Lucky they were
equipped with a radio transmitter, with 82.
______
which they got touch with their commander, who immediat
[简答题]楼层进攻时，分水器阵地通常设置在主入口处，燃烧层高于6层的一般设置在下一层或下两层楼梯间。（）
[单选题]智能变电站的保护,除( )外不同间隔设备的保护功能不应集成。
A.变压器保护
B.线路保护
C.母线保护
D.断路器保护
[单项选择]YJM15-7表示的是（）
A. 用于夹持15根φ7的夹头
B. 用于夹持15根φ7的锚具
C. 用于夹持7根φ15的夹头
D. 用于夹持7根φ15的锚具
[不定项选择题]共用题干
Ants Have Big Impact on Environment as“Ecosystem Engineers”
Research by the University of Exeter has revealed that ants have a big impact on their local environment as a result of their activity as“ecosystem engineers”and predators.The study,published in the Journal of Animal Ecology,found that ants have two distinct effects on their local environment.
Firstly,through moving of soil by nest building activity and by collecting food they af-fect the level of nutrients in the soil.This can indirectly impact the local populations of many animal groups,from decomposers to species much higher up the food chain.
Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by vast numbers of ant workers.
Dirk Sanders,an author of the study from the university's Centre for Ecology and Con-servation,said:“Ants are very effective predators which thrive in huge numbers. They're al-so very territorial and very aggressive,defending their resources and territory against other predators. All of this means they have a strong influence on their surrounding area.”
“In this research,we studied for the first time how big this impact is and the subtleties of it.What we found is that despite being predators,their presence can also lead to an in-crease in density and diversity of other animal groups. They genuinely play a key role in the local environment,having a big influence on the grassland food web,”Sanders said.
The study,carried out in Germany,studied the impact of the presence of different com-binations and densities of black garden ants and common red ants,both species which can be found across Europe,including in the UK.It found that a low density of ants in an area in-creased the diversity and density of other animals in the local area,particularly the density of herbivores and decomposers. At higher densities ants had no or the opposite effect,showing that predation is counteracting the positive influence.
Dr Frank van Veen,another author on the study,said:“What we find is that the impact of ants on soil nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their predatory impacts have the bigger effect一thereby counter-acting the positive influence via ecosystem engineering.”
Ants are important components of ecosystems not only because they constitute a great part of the animal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high and these organisms are highly responsive to human impact,which obvi-ously reduces its richness. However,it is not clear how such disturbance damages the main-tenance of ant services to the ecosystem. Ants are important in below ground processes through the alteration of the physical and chemical environment and through their effects on plants,microorganisms,and other soil organisms.
What does paragraph 6 tell us?
A.Ants bring about a negative influence to an area when their population is small.
B.Ants bring about a positive influence to an area when their population is small.
C.Ants'predation counteracts the positive influence they may have on an area.
D.At higher density,ants produce a positive influence on an area.
[单选题]耦合电容器运维细则中，耦合电容器瓷套表面污秽较严重并伴有明显放电或较严重电晕现象的，应（ ）处理。
A.立即汇报调控人员，请计划停运
B.立即汇报分管领导，做紧急停运
C.立即汇报调控人员，做紧急停运
D.不待调令，做紧急停运
[多项选择]我国《合同法》的规定，合同中下列免责条款无效( )。
A. 造成对方人身伤害的
B. 因重大过失造成对方财产损失的
C. 因故意造成对方财产损失的
D. 因过失造成对方财产损失的
E. 内容约定不明确的
[单选题]A-E-G-001 5 2 4
( )设在一条线路自起点计算每半公里处。
A.公里标
B.半公里标
C.曲线标
D.里程标
[单选题]红布幔应采用（ ）制作。
A.A.纯棉布
B.B.尼龙布
C.C.塑料布
[判断题]对于封锁操作,在该操作方式下遵循“谁封锁,谁解锁”的原则,即调度员封锁的设备,车站无法解锁;车站封锁的设备,调度员无法解锁。
A.正确
B.错误
[多选题] 【消防车、消防艇前往执行火灾扑救或者应急救援任务,在确保安全的前提下,不受( )的限制制定应急预案,建立应急反应和处置机制,为火灾扑救和应急救援工作提供人员、装备等保障。——《消防法》第四十七条】
A.行驶速度
B.行驶路线
C.行驶方向
D.指挥信号
[判断题]滚筒驱动的带式输送机可以不使用阻燃输送带。
A.正确
B.错误
[填空题]扦样方案的内容有：（）、（）和扦样方法、扦样人员、扦样地点、扦样时间、扦样品种和数量、封样方式、装具和运输、储存等。
[单选题]跨越架架体的强度，应能在（）时承受冲击荷载。
A.展放导引绳
B.展放牵引绳
C.发生断线或跑线
D.紧线
[单选题]10kV及以下系统在带电作业中，过电压水平为44kV。（）
A.正确
B.错误
C.
D.
E.略
[判断题] 企业的收入包括主营业务收入、其他业务收入和营业外收入。( )
A.正确
B.错误
