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[判断题] RCD的主要用于防止由于间接接触和由于直接接触引起的单相触电事故。.
A.正确
B.错误

热门试题:

[单项选择]可以测量脊柱活动范围的方法是()
A. 短臂量角器测量
B. 长臂量角器测量
C. 半圆形量角器测量
D. 测量指尖与地面距离
E. 圆规测量
[单选题]主体单位负责人负责协调各单位作业组织,各单位应服从主体单位负责人指挥,按时完成施工(维修)任务。维修与施工共用时维修负责人应参加施工( )。
A.预备会和总结会
B.预备会
C.总结会
D.协调会
[单选题]一次火灾死亡十人以上的,重伤二十人以上或者死亡、重伤二十人以上的,受灾五十户以上的,由 ( )负责调查。
A.省、自治区人民政府应急部门
B.省、自治区人民政府消防救援机构
C.市人民政府消防救援机构
D.县人民政府消防救援机构
[单选题]下列各种阀门中( )不需要进行流向选择。
A.球阀
B.单座阀
C.高压阀
D.套筒阀
[单项选择]男,46岁。发现右眼睑皮下硬结半月余,自觉无明显不适。检查:右眼视力正常,眼睑皮肤稍隆起,眼睑皮下可触及一黄豆大圆形肿块,边界清楚,与皮肤无粘连,无明显压痛,局部睑结膜暗红色充血,余无异常发现。此病最好的治疗方法为()
A. 热敷
B. 局部涂抗生素眼膏
C. 全身应用抗生素类药物
D. 手术切除
E. 口服维生素B2
[简答题]车门紧急解锁方法
[单项选择]胃癌的癌前病变是指()
A. 慢性胃炎
B. 胃息肉
C. 胃溃疡
D. 残胃
E. 肠化和异型增生
[多选题]当电缆出现()时,属于严重缺陷。
A.埋深量不能满足设计要求且没有任何保护措施
B.电缆外护套严重破损、变形
C.耐压试验前后,主绝缘电阻值下降,可短期维持运行
D.埋深量不能满足设计要求且没有任何保护措施
[简答题]放炮后,司机何时可以进行操作?
[单选题]
悬空作业所用的索具、脚手板、吊篮、吊笼、平台等设备,均需经过( )或验证方可使用。
A. 安全员检查
B. 施工人员验收
C. 先试用
D. 技术鉴定
[判断题]计算机中最小单位是二进制的一个数位 (  )
A.正确
B.错误
[多选题]带电断、接空载线路所接引线长度应适当,与()应有足够安全距离,连接应牢固可靠。
A.A.周围接地构件
B.B.带电线路
C.C.作业人员
D.D.不同相带电体
E.略
F.略
G.略
[不定项选择题]共用题干 The Caffeine Habit

There are more than 170 million drug addicts in the U.S.,and the strange thing is that you can be
counted as one of them.You consume your drug of choice every day;you'd feel ill if you couldri't have it;
you'd have a hard time quitting it.
_______________(46)And if you think you get it only in coffee,tea,coca cola,or in smaller bite of choco-
[ate,you haven'tbeen paying attention.Food manufacturers recognize a hot market when they see it,and
with anywhere from 55%to 90%of the U.S.population consuming caffeine every day. _______________(47)The
popular Red Bull energy drink is one of them,and others like caffeine-infused gum,mints,beer,candy,even
soap一which is supposed to provide its caffeine boost through the skin.
Regular amount of caffeine has been the subject of endless medical studies.We know caffeine could
work effectively by controlling neurotransmitters that would normally make you sleepy,improving cognitive
Function and even athletic performance.________________(48)"Exactly what level of caffeine is harmful is not
clearly established,but generally more than five cups of coffee is too much,"said physiologist Harris Lieber-
man from U.S.Army Research Institute of Environmental Medicine,who has been studying the effects of
caffeine for more than 20 years."It's typically possible to die from a caffeine overuse,but,"says Dr. Eric
Lavonas, a North Carolina emergency-room doctor,"you have to really work at it." _______________(49)Bill
Bradley,in 2000 presidential candidate,attributed his irregular heartbeat to caffeine overuse.
In a country of caffeine addicts,it's unlikely that you'll never develop a serious problem,and there
aren't any repair centers for coffee dependence._______________(50)The highest caffeine boost can be felt one
hour following input,but significant effects can last for eight hours.If you're at risk for heart disease or
digestive disorders,talk to your doctor about how much caffeine you should be drinking. Like any pleasurable
substance,caffeine can be abused.So enjoy一but with care. _________(47)
A.Depending on the study,the stuff now is turning up everywhere.
B.The chemical that has you addicted,of course,is caffeine.
C.But how much is too much?
D.Far more common are people who simply fall ill from eating or drinking too much of that stuff.
E.Here are seven tips to loosen the death grip of caffeine addiction.
F.So the best advice is to know your limits.
[多选题]有( )情况之一时,应及时修理或更换护轨
A.护轨与尖轨(基本轨)间净距偏差超过5mm
B.护轨与尖轨(基本轨)间净距偏差超过10mm
C.护轨高于尖轨(基本轨)25mm或低于尖轨(基本轨)5mm
D.护轨高于尖轨(基本轨)5mm或低于尖轨(基本轨)25mm
[判断题]防护员必须具有高度的责任感,身体健康、视力和听力良好,说话吐字清楚,能准确进行防护记录。()
A.正确
B.错误
[单选题]为了加强安全管理,政府要求施工单位要缴纳工伤社会保险,关于该保险费缴纳的说法正确的是( )。
A. 施工单位与劳动者各缴纳一半
B. 施工单位全额缴纳
C. 施工单位与劳动者在合同中约定交纳办法
D. 劳动者全额缴纳
[填空题]日最高气温达到( )℃以上,应当停止当日室外露天作业。
[单选题] 告诉糖尿病病人为良好控制血糖,饮食疗法中关键的一个方面是 ( )
A.按时进食
B.控制总热量
C.严格限制各种甜食
D.不能空腹进行体育锻炼
E.每周监测体重
[单选题]【单选】对RSRP描述错误的是( )[1分]
A.RSRP是承载小区参考信号RE上的线性平均功率
B.只通过RSRP即可以确定系统实际覆盖情况
C.一定程度上可以用来反映移动台距离基站的远近,因此可以用来度量小区覆盖范围大小
D.RSRP是一个表示接收信号强度的绝对值
[单项选择]All the recent news on AIDS is bad. The death of Rock Rudson last year raised public concern about the epidemic almost to the point of panic. But that reaction subsided for a time as people were reassured about the reliability of new tests for donated blood and the improbability of contracting the disease casually. Now, general concern is focused not so much on personal risk--most cases continue to occur in the high-risk groups of male homosexuals and drug addicts--but on the growing realization that this disease is having a deep impact on our society in a number of ways.
It is absorbing financial and other resources. AIDS patients require long-term care in hospitals and outpatient facilities, and the health care systems in such cities as New York and San Francisco are not prepared to handle the demand. Bellevue, a large and respected municipal hospital in New York, devotes one out of every four beds in its department of medicine to AIDS patients. Most are hospitalized for months,
A. There is no good news on AIDS.
B. The total economic cost for AIDS patients is staggering.
C. Nationwide efforts must be made to find a cure for AIDS.
D. AIDS has a deep impact on American society.
[单项选择]下列细胞或成分中与机体的非特异性免疫无关的是()
A. 巨噬细胞
B. 单核细胞
C. 补体
D. 免疫活性细胞
E. 中性粒细胞
[单选题]患者患高血压病3年,入院后给予降压药等治疗,在用药护理中指导患者改变体位时动作宜缓慢,其目的为( )
A.避免发生高血压脑病
B.避免发生高血压危象
C.避免发生急进性高血压
D.避免发生体位性低血压
E.避免血压增高
[单项选择]以下哪一项不属于物联网的应用层()。
A. 信息处理
B. 应用集成
C. 解析服务
D. 通信模块
[填空题]突出煤层长距离的掘进巷道中,应每隔()米设置一组压风自救器。
[单选题]炮制熟大黄时,每炙药物100kg用黄酒
A.10kg
B.15kg
C.20kg
D.30kg
E.5kg
[多项选择]女,39岁。主诉突发剧烈头痛半个月,伴意识障碍,右侧肢体活动减少1周。入院半个月前患者与家人聊天时突感剧烈头痛,呈持续胀痛,不能忍受,急到私人诊所,测血压为200/100mmHg。半小时后出现意识丧失,肢体强直抽搐,口吐白沫,持续约10分钟自行缓解。急送当地医院行头颅CT检查示颅内出血,腰穿检查示血性脑脊液(具体不详),给予药物治疗,头痛缓解。1周后患者出现昏睡,表情淡漠,不能言语,同时出现右侧肢体活动减少。入院查体:呈昏睡状态,颈强直。克氏征、布氏征阳性。右侧肢体肌力Ⅱ级,右侧巴氏征(+)。根据患者情况,应采取的外科治疗方法是()
A. 3H治疗
B. 显微手术动脉瘤夹闭术
C. 显微手术动脉瘤孤立术
D. 钙离子拮抗剂
E. 微弹簧圈栓塞术
F. 球囊栓塞术
[单项选择]在原油乳化液中加入破乳剂,可以降低乳化原油的(),使水滴易从油中分离出来。
A. 老化程度
B. 稳定程度
C. 分散度
D. 固化程度
[单项选择]按照S0LAS公约的规定,货船设备安全证书换证检验间隔,除公约另有规定外,不得超过()年。
A. 1
B. 2
C. 3
D. 5
[单选题]当市政给水管网设有市政消火栓叶,火灾吋水力最不利市政消火栓的出流量不应小于()L/S,且供水压力从地面算起不应小于0.1MPA。
A.5
B.20
C.15
D.10
[单选题]持通票旅客中转换车和中途下车旅客继续旅行时,应先行到车站办理车票签证并核收手续费。
A.正确
B.错误
[单项选择]TTS的异丁烯常用材料分别是聚()
A. 控释膜材料
B. 骨架材料
C. 压敏胶
D. 背衬材料
E. 药库材料
[单项选择]TVM单程票废票箱具有()张票的容量。
A. 600
B. 1000
C. 300
D. 500
[单项选择]( )does he write well,( )he also speaks well.
A. Not only, but
B. Neither, nor
C. Either, or
D. Both, and
[判断题]车轮有裂纹、碾堆、踏面剥离、掉块、擦伤超限,重型轨道车车轮轮辋厚度不足23mm或轮缘厚度不足23mm禁止使用。
A.正确
B.错误
[填空题]CR300AF动车组联挂界面中联挂解联过程中已经完成的步骤背景色为(),尚未进行的步骤背景色为(),某一步骤长时间未完成故障状态时背景色为红色。
[单选题](4分)【单选题】对食管的描述错误的是
A.肌层为两层平滑肌
B.粘膜肌层由一层纵行的平滑肌构成
C.食管腺位于粘膜下层
D.粘膜上皮为复层扁平上皮
[简答题]建构主义学习理论的基本观点包括( )、( )、( )
[单选题]防溜枕木应设置在岔线衔接最外方道岔内方距警冲标不少于( )处(岔线设有大门时,应置于大门内方),但不得设于共用走行线上,并固定加锁。
A.3m
B.5m
C.10m
D.20m

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