热门试题:
[判断题]线路设备状态评定应以千米为单位,得分在85(不含)~60分为合格。
A.正确
B.错误
[多选题]《普修规》双块式和轨枕埋入式桥梁地段无砟道床结构由( )凹槽周围弹性垫层等部分组成。
A.双块式轨枕(或长枕)
B.道床板
C.隔离层
D.底座
[判断题]行政法规高于地方性法规,但低于法律。
A.正确
B.错误
[单项选择]按照法律的表达形式和创制方式的不同,法可分为:( )。
A. 国内法和国际法
B. 根本法和普通法
C. 一般法和特别法
D. 成文法和不成文法
[单选题]安全线有效长一般不小于( )m。
A.30
B.50
C.80
D.100
[单选题]举高消防车的工作目标在车辆的( )。
A.前方
B.后方
C.后方或侧方
D.前方或侧方
[单选题]兆欧表的计量单位是( )。
A.A、兆欧
B.B、千欧
C.C、吉欧
D.D、欧姆
[单选题]使用次氯酸钠作为根管冲洗剂,下列错误的是
A.有杀菌作用
B.可润滑根管器械
C.可溶解坏死组织
D.有螯合作用
E.浓度为2%~5. 25%
[判断题]班应当指定安全员,安全员由分队长担任。
A.正确
B.错误
[单项选择]计算机网络涉及()和计算机两个领域,是两者紧密结合的产物。
A. 通讯
B. 信息
C. 数据
D. 传输介质
[单选题]计算机病毒感染的检测分为人工检测和( )。
A.自动检测
B.还原检测
C.网络检测
D.系统盘检测
[单选题]在三相鼠笼式异步电动机定子绕组上通入三相交流电,能产生一个旋转磁场,旋转磁场的旋转方向取决于电源的()。
A.相位
B.相序
C.角频率
[单选题]引起锅炉受热面结成水垢的离子是( )
A.钙钠离子 B.镁钠离子 C.镁铁离子 D.钙镁离子
A.A
B.B
C.C
D.D
[单选题]钢丝绳端部用绳卡固定连接时,绳卡压板应在钢丝绳主要受力的一边,并不得正反交叉设置;绳卡间距不应小于钢丝绳直径的( )倍。
A.3
B.4
C.5
D.6
[简答题]《普速铁路线路修理实施细则(试行)》(京工函[2019]32号)第4.1.7条 改善轮轨关系,提高轨道结构、基础质量应采取哪些有效的修理方法?
[单选题]由脊髓发出的脊神经数量是( )。
A.31对
B.30对
C.32对
D.29对
E.28对
[单项选择]患者,女性,症见阴肿,阴痒,阴汗,小便淋浊,带下黄臭,舌红苔黄腻,脉弦数有力。辨证为肝胆湿热下注证。方剂宜选用
A. 龙胆泻肝汤
B. 黄连解毒汤
C. 青蒿鳖甲汤
D. 清瘟败毒饮
E. 犀角地黄汤
[判断题]在双侧电源线路上发生接地短路故障,考虑负荷电流情况下,线路接地距离保护由于故障短路点的接地过渡电阻的影响使其测量阻抗增大。( )
A.正确
B.错误
[判断题]个人活期存款结息时,按结息日挂牌活期利率计息。()
[单项选择]市场研究与投资机会分析的着重点是( ),目的和作用是鉴别投资方向,选择建设项目,为下一步的研究打基础。
A. 投资环境分析
B. 企业经营目标和战略分析
C. 企业内外部资源条件分析
D. 工艺技术分析
[多项选择]作用于电力系统的过电压,按其起因及持续时间大致可分为()
A. 大气过电压
B. 工频过电压
C. 谐振过电压
D. 操作过电压
[多选题]对不合规车辆运输车,要认真核查车辆运输车行驶证信息,并使用()或()微信公众号对不合规车辆运输车挂车退出期限进行核查。
A. 车辆运输车治理APP
B. 12328
C. 交警部门APP
D. 交通部门APP
[单选题]熔断器熔丝熔断时,应更换( )。
A.熔丝
B.相同熔丝
C.大容量熔丝
D.小容量熔丝
[单选题]倠.数控系统增量返回参考点,零点到位信号的是从( )发出的。
A. 系统中的脉冲
B. 减速开关
C. 电机后面脉冲编码器中的 A/B 相信号发出的
D. 电机后面脉冲编码器中的 Z 相(一转信号)发出
[单项选择]
Materials and Tools for Language Learning
① The range of materials and tools available to help you with your language studies is huge, from dictionaries to language courses. All of them can help you in different ways, and the appropriate use of these materials and courses will make your language learning much easier and more effective.
② Possibly the most useful tools there are for learning a language are dictionaries. Dictionaries come in a number of formats including bilingual, monolingual, illustrated, electronic and online. Bilingual dictionaries are perhaps the most useful ones for beginners and intermediate learners, while monolingual dictionaries, which are designed for native speakers, are also useful for advanced learners. Pocket dictionaries are good for quick reference and easy to carry around. Larger dictionaries are better if you want more definitions, examples of usage, and information about pronunciation, and grammar. Electronic dictionaries are available as handheld units, or as software. Handheld ones are portable, easy and quick to search, and often provide other functions, such as, text-to-speech, voice recognition and speech synthesis organizers, address books. They tend to be rather expensive though. Software dictionaries offer many of the same functions, and can be used on computers, and mobile phones.
③ The traditional courses tend to consist of textbooks containing dialogues, exercises, notes on grammar, and maybe cultural information. Accompanying cassettes, CDs and/or mp3s are often available. Most such courses are intended for complete beginners or people with only minimal knowledge of the language. Intermediate and advanced-level courses are available for some of the popular languages, such as French, German, Italian and Spanish.
④ Audio courses usually consist solely of cassettes or CDs, though some may also include a limited amount of printed material. All dialogues, exercises, instructions and explanations are recorded and the focus of these courses is teaching you to understand and speak the languages. They are very good at teaching you authentic pronunciation and a manageable amount of vocabulary.
⑤ Various computer-aided courses are available on CD-ROMs and DVDs. Each course is different but they generally include dialogues, audio, exercises and tests. Some also include phrasebooks, dictionaries, videos, games and provide online and/or telephone support.
The appropriate use of these materials and courses will enable you to learn language()
A. more definitions, examples of usage, and information about pronunciation, and grammar
B. authentic pronunciation and a manageable amount of vocabulary
C. phrasebooks, dictionaries, videos, games and provide online and/or telephone support
D. from dictionaries to language courses
E. in a much easier and more effective way
F. beginners or people with only a little knowledge of the language
[判断题]城市轨道交通地下车站显示手信号时:昼间使用信号旗,夜间使用信号灯。
A.正确
B.错误
[单选题]审计部门一般在接到被审计单位的整改报告后()内开展后续审计,并确定审计方式、时间和人员安排。
A.一个月
B.二个月
C.三个月
D.六个月
[单选题]慢性牙周炎的局部治疗除了
A.彻底清除牙石,平整根面
B.牙周袋及根面需做药物处理
C.牙周手术
D.根管治疗
E.建立平衡颌
[判断题]配电工作票的有效期,以批准的停电时间为限。
A.正确
B.错误
[单项选择]频率为2.0MHz的超声在人体软组织中传播时的波长为
A. 0.73mm
B. 0.77mm
C. 0.76mm
D. 0.74mm
E. 0.78mm
[判断题]拆卸制动配件时,应注意保护螺纹,防止碰伤、夹伤。()
A.正确
B.错误
[多选题]《空调列车服务质量规范》规定:重点旅客做到“三知三有”,其中三知是指( )。
A.知座席
B.知困难
C.知到站
D.知姓名
[多选题]教学目标的特征有( )。
A.具有可操作指标体系
B.体现学生学习行为及其变化
C.体现教师思维活动的规律性
D.具有灵活性
E.反映教学方式的科学性
[单选题]检查制动管防尘堵及链作用良好。总风缸管、制动缸均衡管防尘堵无丢失。
A.油管路
B.总风缸管
C.电管路
D.气管路
[单选题]下列课外活动中,能引发学生积极性的是( )
A.体育比赛
B.科普讲座
C.专家报告
D.班会
[判断题]在直流电压作用下棒间隙的直流击穿电压与负棒-正板间隙的击穿电压相比要高。
A.正确
B.错误
[多选题]多功能担架体积小,重量轻,可单人操作,便于携带,可以( )吊运。
A.水平
B.垂直
C.水下
D.水上