热门试题:
[填空题]
Renewable Energy
A.In the past century, it has been seen that the consumption of non-renewable sources of energy has caused more environmental damage than any other human activity. Electricity generated from fossil fuels such as coal and crude oil has led to high concentrations of harmful gases in the atmosphere. This has in turn led to many problems being faced today such as ozone depletion and global warming. Vehicular pollution has also been a major problem.
B.Therefore, alternative sources of energy have become very important and relevant to today’s world. These sources, such as the sun and wind, can never be exhausted and therefore are called renewable. They cause less emission and are available locally. Their use can, to a large extent, reduce chemical, radioactive, and thermal pollution. They stand out as a viable source of clean and limitless energy. These are also known as non-convent
[单选题] FTP是指 ().
A.远程登录
B.网络服务器
C.域名
D.文件传输协议
[单选题]新建时速300~350km客运专线,两涵之间以及桥台尾与涵之间的净距离不宜小于( )。
A.20m
B.30m
C.40m
D.50m
[判断题] 10kV 及以上电力用户变电站用户宜对设备试验数据与该设备标准值、出厂及历次试验数据比较,分析数据变化的规律和趋势;与不同类设备数据比较,判断 是否异常。
A.正确
B.错误
[单项选择]不宜与三棱同用的是()。
A. 赤石脂
B. 郁金
C. 牵牛子
D. 五灵脂
E. 芒硝
[多选题]向封锁区间开行救援列车有何规定?
A.向封锁区间发出救援列车时,不办理行车闭塞手续,以列车调度员的命令,作为进入封锁区间的许可
B.当列车调度电话不通时,应由接到救援请求的车站值班员根据救援请求办理,救援列车以车站值班员的命令,作为进入封锁区间的许可
C.司机接到救援命令后,必须认真确认。命令不清、停车位置不明确时,不准动车
D.救援列车进入封锁区间后,在接近被救援列车或车列2km时,要严格控制速度
E.使用列车无线调度通信设备与请求救援的机车司机进行联系,或以在瞭望距离内能够随时停车的速度运行,最高不得超过20km/h
F.在防护人员处或压上响墩后停车,联系确认,并按要求进行作业
G.当列车调度电话不通时,应由接到救援请求的车站值班员根据救援请求办理,救援列车以车站值班员的口头通知,作为进入封锁区间的许可
[多选题]土建设施检修策略中,屋面防水层渗水的检修策略有( )。
A.涂抹防水胶
B.进行局部整改
C.全部更换
D.热沥青砂浆找平后重做面层
[单项选择]患者,女,56岁,右下肢静脉迂曲扩张20年,伴下肢酸胀、水肿,活动抬高减轻,近2年右足靴区皮肤发红,时有瘙痒,逐渐加重,右下肢大腿内侧、小腿后见迂曲扩张之静脉团,足靴区色素沉着,皮肤变厚。为明确手术治疗方法,术前必须进行哪项检查()
A. 下肢静脉压测定
B. 下肢皮温测定
C. 下肢多普勒超声检查
D. 右下肢静脉造影
E. 深静脉瓣膜功能试验
[单选题]空气弹簧出现故障后差压阀开通,使转向架的两只气囊压力保持()。
A.不变
B.高压
C.低压
D.平衡
[判断题]大型养路机械运行前,各车司机应进行制动机试验,确认基础制动作用良好。
A.正确
B.错误
[简答题]Wonderful fact to reflect upon, that every human creature is constituted to be that profound secret and mystery to every other. A solemn consideration, when enter a great city by night, that every one of those darkly clustered houses encloses its own secret; that every room in every one of them encloses its own secret; that every beating heart in the hundreds of thousands of breasts there, is, if some of its imaginings, a secret to the heart nearest it! Something of the awfulness, even of Death itself, is referable to this. No more can I turn the leaves of this dear book that loved, and vainly hope in time to read it ail. No more can I look into the depths of this unfathomable water, wherein as momentary lights glanced into it, I have had glimpses of buried treasure and other things submerged.
[简答题]电磁流量计无流量信号输出的原因一般有哪些?
[多选题]测定油品凝点时的注意事项有( )。
A.严格控制冷却速度
B.试油第一次实验后,必须重新预热至规定的温度
C.控制冷却剂的温度,比试油预期的凝点低7~8℃
D.测定凝点的温度计在试管内的位置必须固定牢靠
[判断题]电话闭塞法行车时,车站可优先填写路票,再办理进路。
A.正确
B.错误
[单选题]管型避雷器由( )三部分组成。
A. 产气管、内部电极和外部间隙
B. 产气管、内部间隙和外部间隙
C. 产气管、内部间隙和外部电极
D. 产气管、内部电极和外部电极
[单选题]表面淬火主要有( )加热和火焰加热两种。
A.高温
B.高频
C.低温
D.感应
[单选题]连挂专运、公务及特种用途车辆或带此种车辆在接近连挂车辆前,在距停留车10m前须一度停车,再以不超过( )的速度连挂。
A.10km/h
B.5km/h
C.3km/h
[多项选择]肝炎患者不宜采用的避孕方法是
A. 放置宫内节育器
B. 避孕套
C. 口服避孕药
D. 避孕贴剂
E. 使用长效避孕针
[单选题]教师设计“新闻与传记”系列的选修课程,下列适合的是( )。
A.演讲与辩论
B.采访与编辑
C.民俗旅游文化
D.儒家论著选读
[单选题]造成医患交往障碍的患者方面的最常见原因是
A.患者由于疾病的折磨,情绪不稳定,易激惹
B.患者对与医务人员过分挑剔
C.患者缺乏医学知识
D.患者恶意的挑衅
E.患者对医生的不信任
[单选题] BK28022XZ043 不能用照射紫外线制备病毒灭活疫苗的原因是 ( )
A. 此种灭活的疫苗抗原性弱
B. 此种灭活的疫苗容易诱发被接种者癌瘤
C. 紫外线杀伤力弱不能灭活所有的病毒
D. 穿透力弱
E. 此种灭活的疫苗经可见光照射可复活毒株
[判断题]变压器油本身绝缘强度比空气小,所以油箱内充满油后,可降低变压器的绝缘强度。( )
A.正确
B.错误
[单选题]安全管理是队伍建设()、经常性的基础工作,是有效履行职责使命的基本保证。
A.安全性
B.全面性
C.综合性
D.合理性
[判断题]( )用单结晶体管的触发电路的缺点是输出脉冲不够宽。
A.正确
B.错误
[单项选择]As you make your way through the crowded stalls of Beijing’s food markets nowadays, you may sometimes be confused as to just what you should be looking for. There is a profusion of fresh vegetables laid out for sale, so much celery, so many Dutch beans, tomatoes, even broccoli and parsley. How different things were only a scant 15 years ago. At that time there was no variety in the selection of vegetables. Today, with bread, jam, milk and eggs available for breakfast instead of porridge, deep-fried dough strips and pickles, more and more people can afford the indulgence of eating whatever they want.
It is all the rage for fashionable teenagers to go to a Western restaurant for spaghetti, a hamburger, filed chicken, pizza or a sandwich. Older folks in China have not quite caught on to these trends, as their younger counterparts have, and tend to be more practical, focusing their attention on simple but sensible food. The purpose of eating is not simply to fill one’s stomach, they
A. revolution
B. trend
C. ceremony
D. waste
[判断题]被誉为“地球之肺”的是位于中非的热带雨林。( )
[单选题]在职业安全健康管理体系中,危害辨识与风险评价应覆盖()。
A.所有进人用人单位作业场所人员的活动
B.用人单位的常规和非常规的活动
C.所有其他答案
D.用人单位作业场所内的所有物料和设施
[单选题]列车网络控制权转移的过程中:换端操作后弱节点(原主节点)取消对所有节点,成为从节点。
A.控制
B.命名
C.监控
D.衔接
[多项选择]下列属于连锁式聚合机理的反应有();
A. 正丁基乙烯基醚用BF3-H2O引发聚合;
B. 偏二腈基乙烯用萘钠引发的聚合反应;
C. 对苯二甲酰氯与对苯二胺低温缩聚生成全芳聚酰胺液晶高分子的反应;
D. 双酚A与光气生成聚碳酸酯的反应
[多选题]用于轴上零件周向定位的有( )。
A.轴肩
B.套筒
C.平键
D.花键
E.过盈配合
[单选题]允许速度不大于120 km/h线路,反向曲线两超高顺坡终点间的夹直线长度在极个别情况下不足25 m时,正线不应短于( ) m。
A.10
B.20
C.25
D.50
E.60
F.75
[多选题](2015年真题)根据《标准施工招标文件》,应当进行重新招标的情形有( )。
A.投标截止时间后招标人不同意开标的
B.投标截止时间止,投标人少于3家的
C.投标人投诉中标人的
D.经评标委员会评审后否决所有投标的
E.招标人不接受评标评审结果的
[单选题]
应急堵漏器是根据管径大小在工厂预制的应急堵漏器材,类似于环箍堵漏,也称( )。
A.管箍
B.管卡
C.法兰
D.紧急切断阀
[单项选择]对左心功能判断最有价值的是()
A. 心脏超声检查
B. X线心脏三位相片检查
C. 冠状动脉造影检查
D. 漂浮导管检查
E. 平板试验检查
[多选题]在电气化铁路线路上起道作业,应遵守以下规定:()。
A.两股钢轨同时起道时,一次作业起道量不得超过30毫米
B.两股钢轨同时起道时,两股钢轨起道量相差不得超过11毫米
C.调整曲线超高时,单股起道量不得超过11毫米
D.起道量超出规定时,应事先通知供电部门调查确认接触网设备调整工作量并配合作业
[单项选择]关于前列腺炎时前列腺液镜检的结果,错误的说法是()
A. 白细胞增多且成堆
B. 无红细胞
C. 上皮细胞增多
D. 卵磷脂小体减少
E. 直接涂片可检出细菌,以葡萄球菌最多见
[单选题]某站调车发生冲突,造成直接经济损失510万元,属于铁路交通一般()事故。
A.A类
B.B类
C.C类
D.D类