热门试题:
[单项选择]通常哪项工作可以不做？（）
A. 重要且紧急的事件
B. 重要但不紧急的事件
C. 不重要但紧急的事件
D. 不重要也不紧急的事件
[单选题]移动式电动机械和手持电动工具的单相电源线应使用（ ）芯软橡胶电缆。
A.A.二
B.B.三
C.C.四
D.D.五
E./
F./
[判断题]自动化立体仓库使用机械和自动化装备,运行和处理速度快,提高了劳动生产率,降低了操作人员的劳动强度。( )
A.正确
B.错误
[单选题] 2018年9月1日起实施的《上海轨道交通手摇道岔作业管理规定》 中规定, 当道岔当前位置与所需位置不一致时, ( )应安排手摇道岔作业人员进行手摇道岔作业。
A.运营调度
B.车站值班员
C.列车司机
D.值班站长
[单项选择]
Many foreigners who have not visited Britain call all the inhabitants English, for they are used to thinking of the British Isles as England. (21) , the British Isles contain a variety of peoples, and only the people of England call themselves English. The others (22) to themselves as Welsh, Scottish, or Irish, (23) the case may be; they are often slightly annoyed (24) being classified as "English".
Even in England there are many (25) in regional character and speech. The chief (26) is between southern England and northern England. South of a (27) going from Bristol to London, people speak the type of English usually learnt by foreign students, (28) there are local variations.
Further north, regional speech is usually" (29) "than that of southern Britain. Northerners are (30) to claim that they work harder than Southerners, and are more (31) . They
A. as
B. which
C. for
D. so
[判断题]轨道车担当非本务牵引或在列车尾部担当补机任务时,应将轨道车运行控制设备(GYK)转为本务工作状态。( )
A.正确
B.错误
[多选题]使用旧滑靴时，取决于滑靴磨损量，最大磨损15mm，测量时，碳滑靴高度+磨损量=工作位置200mm时测量，测量值必须是120N+24N，如果数值不在120N+24N内，检查（）和（ ）。
A. 碳滑板
B.弹簧
C. 受流臂
D. 弹性轴承
[单选题][T] BH004 4 1 5
在PLC的输入/输出单元中,光电耦合电路的主要作用是( )
A.信号隔离
B.信号传输
C.信号隔离与传输
D.状态指示
[判断题]车站值班员得到货物列车后端距出站（进路、调车）信号机（无信号机时为轨道电路绝缘节）距离不足3m的报告后，不得同意试风。
A.正确
B.错误
[判断题]操纵机动艇时应少用倒车，用时还要注意螺旋桨的倒车效应，猛打倒车还要注意舵叶会猛然转向一侧而使舵柄打伤舵手。（）
[单选题]从港务区出发的清洗车在轨道技术人员的指引下，抵达胀轨地段前（）的地段减速停车。
A.100m
B.50m
C.150m
D.200m
[单项选择]Without regular supplies of some hormones our capacity to behave would be seriously impaired; without others we would soon die. Tiny amounts of some hormones can modify our moods and our actions, our inclination to eat or drink, our aggressiveness or submissiveness (顺从), and our reproductive and parental behavior. And hormones do more than influence adult behavior; early in life they help to determine the development of bodily form and may even determine an individual’s behavioral capacities. Later in life the changing outputs of some endocrine (内分泌) glands (腺体) and the body’s changing sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century. The emergence of endocrinology (内分泌学) as a separate discipline can probably be traced to the experiments of Ba
A. explain the specific functions
B. provide general information about hormones
C. explain how the term "hormone" evolved
D. report on experiments in endocrinology
[单选题]下列关于施工现场功能区域划分的叙述，不正确的是（）。
A.施工现场的办公区、生活区应当与作业区分开设置
B.办公生活区应当设置于在建建筑物坠落半径之外，不允许设置在在建建筑物坠落半径范 围内
C.办公区、生活区与施工区间应采取相应的防护隔离措施，设置明显的指示标识
D.功能区的规划设置时应考虑交通、水电、消防和环保等因素
[单选题]25T型客车充电器由DC11OV充电机和（ ）组成
A.单相逆变器
B.三相逆变器
C.蓄电池
D.应急电源
[单选题]模拟信号的幅度是连续的，即时间上是连续的信号，其在某一取值范围内可以取()个数值。(4114)
A.1
B.2
C.许多
D.无限
[单项选择]2004年8月28曰，十届人大常委会第十一次会议通过了《关于修改〈中华人民共和国土地管理法〉的决定》，区分了( )的不同性质。
A. “国有”和“集体”
B. “有偿”和“无偿”
C. “出让”和“转让”
D. “征收”和“征用”
[判断题]注册会计师盈利预测审核，主要是对被审核单位编制盈利预测所依据的基本假设、所选用的会计政策和盈利预测结果的可靠性发表审核意见。 ( )
[单项选择]
|
男婴，1个月，生后13天开始呕吐，进行性加重，喷射样，呕吐物不含胆汁，近3天未排大便且尿少，查体有脱水征，腹部可见胃蠕动波，无压痛及肌紧张。 |
首选的辅助检查方法是( )
A. 钡餐检查
B. 腹部放射性核素扫描
C. B超检查
D. 钡灌肠检查
E. CT检查
[多选题]危险化学品应指定专人保管，存放地点必须落实安全防护措施，易燃易爆物品应严格按规定与火源区隔离。氧气瓶与乙炔瓶（器）之间距离不得少于（）m，二者与明火之间的距离不得少于（）m。
A.3
B.5
C.8
D.10
[单项选择]按照国家规定需要有关部门批准或者核准的建设项目，以划拨方式提供国有土地使用权的，建设单位在报送有关部门批准或者核准前，应当向（ ）申请核发选址意见书。
A. 县级以上人民政府
B. 建设管理部门
C. 城乡规划主管部门
D. 国土管理主管部门
[单选题]普通螺栓按加工精度分类，（）级螺栓是粗制螺栓。
A.A
B.B
C.C
D.D
[单选题]良性肿瘤的异型性主要体现在
A.组织结构空间排列紊乱
B.瘤细胞核的多形性
C.胞核与胞质的比例增高
D.胞质呈嗜碱性
E.出现病理性核分裂象
[不定项选择题]共用题干
Face Masks May Not Protect from Super-flu
1 If a super-flu strikes,face masks may not protect you.Whether widespread use of masks will help,or
harm,during the next worldwide flu outbreak is a question that researchers are studying furiously.No results
have come from their mask research yet.However,the government says people should consider wearing them
in certain situations anyway,just in case.
2 Butit's a question the public keeps asking while the governments are making preparations for the
next flu pandemic. So the Centers for Disease Control and Prevention ( CDC ) came up with（提出）prelimi-
nary guidelines（初步指导方针）." We don ' t want people wearing them everywhere,"said the CD
C. " The
overall recommendation really is to avoid exposure."
3 When that'S not possible,the guidelines say to consider wearing a simple surgical mask if you are in
one of the three following situations.First,you're healthy and can't avoid going to a' crowded place.Second,
you're sick and think you may have close contact with the healthy,such as a family member checking on
you.Third,you live with someone who'S sick and thus might be in the early stages of infection,but still need
to go out.
4 Influenza pandemic can strike when the easy-to-mutate flu virus shifts to a strain that people never
have experienced.Scientists cannot predict when the next pandemic will arrive,although concern is rising
that the Asian bird flu might trigger one if it starts spreading easily from person to person.
5 During the flu pandemic,you should protect yourself. Avoid crowds,and avoid close contact with the
sick unless you must care for someone.Why aren't masks added to this self-protection list?Because they can
help trap virus-laden（含有病毒的、充满细菌的）droplets flying through the air with a cough or sneeze.
Simple surgical masks only filter the larger droplets.Besides,the CDC is afraid masks may create a false
sense of security.Perhaps someone who should have stayed home would don an ill-fitting mask and hop on
the subway instead.
6 Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand,then tou--
ches a doorknob or subway pole.If you touch that spot next and then put germy hands on your nose or
mouth,you'ye been exposed.It's harder to rub your nose while wearing a mask and so your face may get
pretty sweaty under masks.You reach under to wipe that sweat,and may transfer germs caught on the outside
of the mask straight to the nose.These are the problems face masks may create for their users.
7 Whether people should or should not use face masks still remains a question.The general public has
to wait patiently for the results of the mask research scientists are still doing.
The public will not know the answer about masks until scientists_________.
A.overuse face masks
B.deal with the mask problem seriously
C.rub their faces and noses in the subway
D.protest against the mask guidelines
E.help protect people from being attacked by a flu
F.announce the results of their mask research
[单选题]牵引变电所避雷器检测周期是（ ）年。
A.0.6
B.1
C.2
D.3
[单选题]稳压管稳压时工作在( )。
A.正向区
B.饱和区
C.击穿区
D.无法确定
[单选题]给老年人滴耳药时应先牵拉外耳廓，再滴药
A.向上向前
B.向下向前
C.向后上方
D.向下向后
[单项选择]程序段N0010M03S400T0101；表示主轴正转，转速400r/min，调（）号刀，刀补号01。
A. 3
B. 4
C. 10
D. 1
[单项选择]土地使用强度是通过( )指标来控制的。
A. 土地使用性质
B. 容积率
C. 建筑密度
D. 容积率和建筑密度
[单选题]根据《生产安全事故报告调查处理条例》,事故发生单位主要负责人受到刑事处罚或者撤职处分的,自刑罚执行完毕或者受处分之日起,()年内不得担任本行业企业的矿长(厂长、经理)。
A.终身
B.10年内
C.5年内
[多选题]消防安全工作必须贯彻“预防为主，防消结合”的方针，坚持“()”
A.党政同责
B.一岗双责
C.齐抓共管
D.一岗多责
[填空题]药物降解的两个主要途径为________和________。
[判断题](468505)( )吸收是利用气体混合物中各组分的密度不同，将混合物分离的过程。((1.0分)
A.正确
B.错误
[多选题]功率因数在数值上,其即为( )与()之比。
A...有功功率
B...视在功率
C...无功功率
D...总功率
[单项选择]国内旅行社应缴纳质量保证金( )万元人民币。
A. 10
B. 15
C. 20
D. 25
[填空题](62680)SS4型电力机车处于电阻制动工况时，励磁绕组过流保护是通过电流传感器199SC→电子柜→励磁过流中间继电器559KA→（ ）器91KM分闸，切断励磁电路。(2.0分)
[单项选择]门诊体检时特别应注意的体征是
A. 前囟张力
B. 颅骨软化
C. 方颅
D. 测量头围
E. 鸡胸
[填空题]在Word 2003中默认的文档视图是______视图。
[单项选择]PN结是构成各种半导体器件的基础，其主要特性是（）。
A. 具有放大特性
B. 具有单向导电性
C. 具有改变电压特性
D. 具有增强内电场特性
[判断题]装卸钢板、卷钢类货物应使用电磁吸盘或钢板钳（夹），4米以上的柔性货物应使用电磁吸盘或均衡梁，装卸圆形新闻纸应使用夹包机，装卸原木应使用抓木机等专用机械。
A.正确
B.错误
[多选题]勤务辅警按照岗位职责可以从事下列哪些辅助工作?( )
A.协助开展治安巡逻、治安检查。
B.协助开展行政案件接报案、受案登记。
C.协助开展戒毒人员日常管理、公开查缉毒品。
D.协助开展社会治安防范、交通安全宣传教育。
