热门试题:
[判断题]安全基础建设包括安全设施设备、安全人才和安全文化建设。( )
A.正确
B.错误
[单项选择]Mrs. Read is our English teacher. She is from England. She is not young. She is 48. She can speak English very well. There are twenty girls and twenty-four boys in her class. Jim is from England, too. Bill is from Australia. The twins are from America. But the other students are Chinese. Mrs. Read likes her students very much. She works very hard. She often helps them to study English in her class. Site is a good teacher and she is the students’ good friend, too.
Mrs. Read is ______ of the students.
A. a good teacher
B. a good friend
C. A and B
[单选题]施工作业部门必须严格遵守施工作业时限。当预计不能在规定时限内施工完毕的,应至少提前( )向车站值班员说明需延长的时间及原因,待得到值班员的许可后,方可延长施工作业时间。
A.10分钟
B.10分钟
C.30分钟
D.没有时间限制
[单选题]两只电容C1=10mF,C2=20mF并联后的电容量为( )。 ( )
A.30mF
B. 20/3mF
C. 10mF
D. 20mF
[单选题] 使足内翻的肌是( )
A.腓肠肌
B.胫骨前肌
C.腓骨长肌
D.腓骨短肌
E.比目鱼肌
[单选题]送风盔式面罩风源应是()。
A.二氧化碳
B.纯氧
C.净化的新鲜空气
[判断题]( )在大雾天气行驶时,能见度在50米以内时,机动车最高时速不得超过每小时60公里。
A.正确
B.错误
[单选题]依据《省住房和城乡建设厅关于改革和完善房屋建筑和市政基础设施工程招标投标制度的实施意见》(苏建规字(2017)1号文),技术复杂的市政工程有()。
A.单跨40米以上的城市桥梁
B.直径1.5米以上的大口径顶管工程
C.垃圾处理厂
D.10万吨/日以上污水泵站
[单项选择]生精功能障碍的病因不包括()。
A. 睾丸本身疾病
B. 精子发生功能障碍
C. 染色体异常
D. 前列腺增生
E. 局部病变
[单选题]由一个或一组工人在不更换设备或地点的情况下完成的装配工作叫( )。
A.A、装配工序
B.B、工步
C.C、部件装配
D.D、总装配
[单项选择]Imagine a world in which there was suddenly no emotion--a world in which human beings could feel no love or happiness, no terror or hate. Try to imagine the consequences of such a transformation. People might not be able to stay alive: knowing neither joy nor pleasure, neither anxiety nor fear, they would be as likely to repeat acts that hurt them as acts that were beneficial. They could not learn: they could not benefit from experience because this emotionless world would lack rewards and punishments. Society would soon disappear: people would be as likely to harm one another as to provide help and support. Human relationships would not exist: in a world without friends or enemies, there could be no marriage, affection among companions, or bonds among members of groups. Society’s economic underpinnings would be destroyed: since earning $10 million would be no more pleasant than earning $10, there would be no incentive to work. In fact, there would be no incentives of any kind. For as
A. believe that emotions are fundamental for them to stay alive
B. benefit from rewarded for doing the right thing
C. know what is vital to progress of society
D. enjoy being rewarded for doing the right thing
[单项选择]红木家具的产品质量明示卡中的产品规格应以()为单位标注。
A. mm
B. cm
C. dm
D. m
[单选题]下述论述中,完全正确的是(____)。
A.自感系数取决于线圈的形状、大小和匝数等,跟是否有磁介质无关
B.互感系数的大小取决于线圈的几何尺寸、相互位置等,与匝数多少无关
C.空心线圈的自感系数是一个常数,与电压和电流大小无关
D.互感系数的大小与线圈自感系数的大小无关
[判断题] 前挡风玻璃装置的刮水器应完好有效,确保驾驶员有良好的前方视野。
A.正确
B.错误
[单选题]构支架吊装作业,吊件离地面约( )mm时,应停止起吊,全面检查确认无问题后,方可继续,起吊应平稳。
A.100
B.150
C.200
D.250
[单选题]凡在车站参加作业的站、段、所等有关人员,均须熟悉和执行()的有关规定。
A.A.《技规》
B.B.《站细》
C.C.《行规》
D.D.《调规》
[单选题]下面哪个口令的安全性最高( )。
A.integrity123456
B.!7es6RFEd195ds@@SDa
C.passWodassWodassWod
D.qiuadmin123456
[单项选择]下列各项工程中,需要编制单位工程施工组织设计的是( )。
A. 某工厂新建厂区工程
B. 某工程深基坑支护工程
C. 某高校新校区办公大楼工程
D. 某定向爆破工程
[单选题]现场高压试验区域应设置遮栏或围栏,向外悬挂(____)的安全标志牌,并设专人看护,被试设备两端不在同一地点时,另一端应同时派人看守。
A.止步,高压危险!
B.禁止跨越
C.禁止入内
D.在此工作
[单选题]曲线半径250m<R≤350m的到发线曲线正矢计划维修容许偏差管理值:圆曲线正矢最大最小值差为()。
A.6mm
B.18mm
C.12mm
D.9mm
[单选题]在路上遇见童年时期的小伙伴,虽然叫不出他的姓名,但确认是认识的,此时的心理活动是( )
A.重现
B.保持
C.回忆
D.再认
[单项选择]我国已经进入老龄化社会,老龄化不仅意味着人口老年负担系数不断提高,同时也意味着劳动投入的减少。面对我国老龄化这一不争的事实,延迟退休年龄可以大大减缓劳动力总量的不足。如果以下各项均为真,最能削弱上述观点的是()。
A. 中国适龄劳动力存量正处于高峰期,大约有1亿人口没有就业。
B. 2010年我国60岁以上人口1.8亿,占全球60岁以上人口的24%。
C. 按照我国目前的老龄化进度,到2050年我国仍有劳动人口7.1亿。
D. 我国每年新增的1200万个就业岗位中,有超过30%来自退休人员。
[单选题]当超长列车尾部停在警冲标外方,接入相对方向的列车时,在进站信号机外制动距离内进站方向为超过( )的下坡道,而接车线末端无隔开设备,须使列车在站外停车后,再接入站内。
A.6‰
B.4‰
C.8‰
D.5‰
[单项选择] A Hierarchy of Hormones
All of the cells in a particular plant start out with the same complement of genes. How then can these cells differentiate and from structures as different as roots, stems, leaves, and fruits The answer is that only a small subset of the genes in a particular kind of cell are expressed, or turned on, at a given time. This is accomplished by a complex system of chemical messengers that in plants include hormones and other regulatory molecules. Five major hormones have been identified; auxin (生长素), abscisic acid(脱落酸) ,cytokinin(细胞激动素), hetylene(乙烯), and gibberellin(赤霉素). Studies of plants have now identified a new class of regulatory molecules called oligosaccharins.
Unlike the oligosaccharins, the five well-known plant hormones are pleiotropic (多向性的) rather than specific, that is, each has more than one effect on the growth and development of plants. The five have so many simultaneous effects that they are not very useful i
A. trace the passage of chemicals through the walls of cells.
B. pinpoint functions of other plant hormones.
C. artificially control specific aspects of the development of crops.
D. alter the complement of genes in the cells of plants.
[填空题]需登乘动车组进入故障地点处置故障时,设备管理单位应在<--NRC-->《行车设备检查登记簿》内办理登记。
[单选题]坚决维护党中央权威和集中统一领导,最关键的是什么?
A.坚决维护总书记新时代特色社会主义思想
B.坚决维护总书记党中央的核心、全党的核心地位
C.坚决维护党中央权威和集中统一领导
D.坚决维护党的政治纪律和政治规矩
[单项选择]
分为四组,任选一组作答。每题的备选项中,只有1个最符合题意。
矿井高压电网,必须限制单相接地电容电流,使之不超过( )。
A. 10A
B. 20A
C. 30A
D. 40A
[填空题]当水中含有钠盐硬度时,应不会存在非碳酸盐硬度(永久硬度),因为二者会起反应,如(),所以钠盐碱度称之为“负硬度”。
[判断题]在运行中,当贮罐发生超液位现象时,应采取贮罐串气、倒罐方法处理。
A.正确
B.错误
[判断题]高架火炬应布置在生产区全年最小频率风向的下风侧。
A.正确
B.错误
[单选题] 事故形成的四个条件中,()处于中心位置,是主导因素。
A.管理因素;
B.人的因素;
C.物的因素;
D.环境因素;
[单选题]配送员指甲不能超过手指边缘多长?
A.0.3cm
B.0.5cm
C.0.2cm
D.无要求
[单选题]切除肾上腺皮质的狗,会出现
A.血容量减少,尿钠增多,血钾升高
B.血容量增加,尿钠增多,血钾升高
C.血容量减少,尿钠减少,血钾降低
D.血容量增加,尿钠增多,血钾降低
E.血容量、尿钠和血钾均不变
[判断题]抵押人将已出租的财产抵押的,原租赁合同无效。
A.正确
B.错误
[简答题]人民防空法规定,县级以上人民政府根据需要可以组织试鸣防空警报,并规定了试鸣防空警报前应发布公告。请问,政府应在试鸣前几日发布公告?
[多选题]六氟化硫断路器施工在验收时应提交下列技术文件:()。
A.设计变更的证明文件
B.制造厂提供的产品说明书.装箱单.试验记录.合格证明文件及安装图纸等技术文件
C.检验及质量验收资料.试验报告
D.备品.备件.专用工具及测试仪器清单
[单选题]CFM56-7B发动机,以下哪个部件安装在附件齿轮箱的后部?
A.起动机
B.润滑组件
C.IDG
D.EDP