热门试题:
[单项选择]现代饭店的一次性投入很大，而经营过程中的劳动消费很小，在客房经营费用中，（）占绝大比重。
A. 可变费用
B. 不变费用
C. 固定资产
D. 消耗品
[判断题]必须按规定穿戴防护用品，，严禁穿皮鞋、塑料底鞋进入现场作业。（ ）
A.正确
B.错误
[单项选择]有甲、乙两船同时从龙口出发，甲船路线是龙口——旅顺——大连，乙船路线是龙口—大连．两船航行两天后都在下午三点到达大连，以下关于两船全航程的描述中不正确的是（）
A. 文中“两天”指的是时间，“下午三点”指的是时刻
B. 在研究两船的航行时间时，可以把船视为质点
C. 两船的平均速度相同
D. 两船的路程相同，位移不相同
[多选题]我段防止机车、车辆人身伤害安全措施中规定对（）的人员，严禁单人作业和使用重点工、机具及担任防护员等工作。
A.视听不良
B.行动不便
C.责任心不强
D.三高人员
[判断题]工程施工专业分包合同规定，施工便道由甲方统一规划、设计，由乙方修建至各工点。施工便道日常维护由乙方承担，费用已包含在各分项单价中，甲方不再另行支付。
[单选题]目前环境污染在世界范围内很大部分的原因是A能源的利用引起的，这主要是( )。
A.化石资源利用
B.煤炭资源利用
C.电磁能利用
D.核裂变能利用
[简答题]谈谈如何预防、处理幼儿走失事故。(.10 分)
[多选题]下列关于电绝缘装具阻燃性能的表述中，正确的是( )。
A.以每20s，升压2000V的速度施加电压，在16000V时不被击穿。
B.续燃时间≤2s。
C.阻燃时间≤10s。
D.损毁长度≤10cm。
E.耐酸碱性能：1h内不渗透
[判断题]钢筋骨架中受力变形钢筋的末端宜做成90°弯钩。( )
[判断题]2.51 办理警车注册登记时,登记审核岗应当审查并收存《警车号牌审批表》原件。
A.正确
B.错误
[单项选择]
Sometimes we have specific problems with our mother; sometimes, life with her can just be hard work. If there are difficulties in your (1) , it’s best to deal with them, (2) remember that any (3) should be done (4) person or by letter. The telephone is not a good (5) because it is too easy (6) either side to (7) the conversation.
Explain to her (8) you find difficult in your relationship and then (9) some new arrangements that you think would establish a (10) balance between you. Sometimes we hold (11) from establishing such boundaries because we are afraid that doing (12) implies we are (13) her. We need to remember that being (14) from our mother does not (15) mean that we no longer love her. If the conflict is (16) and you cannot find a way to (17) it, you might decide to give up your relationship with your mother for a while. Some of my patien
A. mustering
B. ejecting
C. insulting
D. retaliating
[判断题]行车中遇老人横过道路，行动缓慢，可持续鸣喇叭催促。
[单选题] 继电保护装置是在（ )或异常运行情况下动作的一种自动装置。
A.电力系统故障
B.频率升高
C.频率降低
[多项选择]桥式起重机的维护修理制度规定的修理项目（）。
A. 事故性修理
B. 预见性修理
C. 计划性修理
D. 一级保养
[单选题]在行显微支气管镜检查时下列哪项容易引起肺部感染
A.应在专用窥镜室内进行
B.应戴口罩，帽子
C.毛刷和活剪钳要符合无菌要求
D.纤维支气管镜应行中水平消毒
E.操作时要戴无菌手套
[判断题]二级化学防护服也适用于灭火以及处置涉及放射性物品、液化气体、低温液体危险物品和爆炸性气体的事故。( )
A.正确
B.错误
[单项选择]立式车床的主轴是直立的，工作台是水平的，笨重工件的装夹、找正比较（）。
A. 方便
B. 麻烦
C. 简单
D. 复杂
[单选题]《铁路旅客运输管理规则》规定，对在不准吸烟处所吸烟的旅客，客运人员应（
）。
A.给予处罚
B.驱出候车室
C.严禁乘车
D.进行劝阻
[单项选择]某大型公共建筑群，设有多个消防控制室，将其办公区的消防控制室作为主消防控制室，其酒店区、商业区等消防控制室作为分消防控制室。下列关于各消防控制室内的消防设备控制和显示说法中，正确的是（）。
A. 可以相互传输、显示状态信息，各分消防控制室可以互相控制
B. 不可以相互传输、显示状态信息，但应互相控制
C. 可以相互传输、显示状态信息，也应相互控制
D. 可以相互传输、显示状态信息，主消防控制室可以控制分消防控制室
[多选题]高空救人时,必须使用安全绳对救援人员进行保护;承载的绳索在接触建(构)筑物的转角处必须设置( )。
A.消防钩
B.安全钩
C.护垫
D.护具
[判断题]( )鉴别是“把关”的前提，通过鉴别才能判断产品质量是否合格。
A.正确
B.错误
[单选题]血小板减少性紫癜鼻出血常见的处理方法错误的是
A.局部压迫止血
B.鼻腔填塞
C.仰头
D.遵嘱输血小板
[多选题]工作终结后，变电工作票、事故应急抢修单，由（ ）保存。
A.运检部
B.运维班
C.工作负责人
D.工作负责人交回签发单位
[简答题]烧伤按伤情分类有哪些？各度具体总面积为多少？
[单选题]窦性心动过缓不发生于：
A.运动员
B.甲状腺功能亢进者
C.病态窦房结综合征者
D.洋地黄中毒者
E.甲状腺机能减退者
[判断题]培育和践行社会主义核心价值观,是推进中国特色社会主义伟大事业、实现中华民族伟大复兴中国梦的战略任务。
A.正确
B.错误
[单项选择]胃十二指肠溃疡穿孔非手术治疗期间最关键的措施是（）
A. 禁食
B. 胃肠减压
C. 严密观察病情
D. 补液，纠正水电解质紊乱
E. 半卧位
[单选题]按照《山东省生产经营单位安全生产主体责任规定》规定，生产经营单位有 （）行为的，由安全生产监督管理部门或者有关部门责令限期改正，可处以5000元以上2万元以下的罚款，对其主要负责人处以1000元以上1万元以下的罚款逾期不改正的，责令限期整顿，可处以2万元以上3万元以下的罚款，对其主要负责人处以1万元以上2万元以下的罚款涉嫌犯罪的，依法追究刑事责任
A.未按规定存缴安全生产风险抵押金的
B.未按规定参加安全生产责任保险的
C.未按规定存缴安全生产风险抵押金或者参加安全生产责任保险的
D.未按规定存缴安全生产风险抵押金和参加安全生产责任保险的
[判断题]在加臭剂注入喷嘴的安装现场的压力管道、管件及配件的焊接作业应由相同级别有效压力容器证件的焊工进行焊接、焊接后应100%探伤检查。 ( )
A.正确
B.错误
[多项选择]工作人员不准在SF6设备防爆膜附近停留，若在巡视中发现异常情况，应（），采取有效措施进行处理。
A. 立即远离
B. 查明原因
C. 立即报告
D. 及时处理
[不定项选择题]共用题干
Lack of Oxygen Delayed the Rise of Animals on Earth
Scientists have long speculated as to why animal species didn't flourish sooner,once sufficient oxygen covered the Earth's surface. Animals began to prosper at the end of the Proterozoic period,about 800 million years ago-but what about the billion-year stretch before that,when most researchers think there also was plenty of oxygen?
Well,it seems the air wasn't so great then,after all.
In a study published Oct. 3 1 in Science,Yale researcher Noah Planavsky and his colleagues found that oxygen levels during the"boring billion"period were only 0.1%of what they are today .In other words,Earth's atmosphere couldn't have supported a diversity of creatures,no matter what genetic advancements were poised to occur.
"There is no question that genetic and ecological innovation must ultimately be behind the rise of animals,but it is equally unavoidable that animals need a certain level of oxygen,"said Planavsky,colead author of the research along with Christopher Reinhard of the Georgia Institute of Technology.“We're providing the first evidence that oxygen levels were low enough during this period to potentially prevent the rise of animals."
The scientists found their evidence by analyzing chromium(Cr)isotopes in ancient sediments from China,Australia,Canada,and the United States.Chromium is found in the Earth's continental crust,and chromium oxidation is directly linked to the presence of free oxygen in the atmosphere.
Specifically,the team studied samples deposited in shallow,iron-rich ocean areas,near the shore.They compared their data with other samples taken from younger locales known to have higher levels of oxygen.
Oxygen's role in controlling the first appearance of animals has long vexed scientists."We were missing the right approach until now,"Planavsky said."Chromium gave us the proxy."
Previous estimates put the oxygen level at 40%of today's conditions during pre-animal times. leaving open the possibility that oxygen was already plentiful enough to support animal life.
In the new study,the researchers acknowledged that oxygen levels were"highly dynamic"in the early atmosphere,with the potential for occasional spikes. However,they said,"It seems clear that there is a first-order difference in the nature of Earth surface Cr cycling"before and af- ter the rise of animals.
"If we are right,our results will really change how people view the origins of animals and other complex life,and their relationships to the co-evolving environment,"said co-author Tim
Lyons of the University of California-Riverside."This could be a game changer."
"There's a lot'of interest right now in a broader discussion surrounding the role that environ- mental stability played in the evolution of complex life,and we think our results are a significant contribution to that,"Reinhard said.
The study revealed that chromium found in Earth's continental crust remained stable before and after the rise of animals.
A.Right
B.Wrong
C.Not mentioned
[单项选择]当着某儿童的面将两杯同样多的水中的一杯倒进一个细长杯子中，然后问他哪个杯子中的水多些时，他说高杯子中的水多些，这说明该儿童思维发展尚处于（）
A. 感觉运动阶段
B. 前运算阶段
C. 具体运算阶段
D. 形式运算阶段进行
E. 无法判断
[填空题]Your assignments this term will be to write two major research papers. One of the most important things about writing a research paper is giving proper{{U}} (36) {{/U}}to your sources of information. Failure to do this is called plagiarism which is a form of{{U}} (37) {{/U}}dishonesty.
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The best way to avoid unintentional plagiarizing is to be very careful in{{U}} (41) {{/U}}your information. As you take notes on books and magazine articles about the topic you’ve selected, first try to{{U}} (42) {{/U}}the information thoroughly. Secondly, write it down in your own words. This is called paraphrasing. If you do a good job of paraphrasing, you’ll{{U}} (43) {{/U}}the main idea from your source withou
[单选题]《铁路线路修理规则》第3.4.7条规定:最高、最低轨温差不大于85℃地区，如将轨缝值减小()mm,轨温限制范围相应地降低3℃~7℃。
A.1~2
B.1~3
C.2~3
D.3~4
[判断题]出现安全事件、事故后，必须要按照四不放过原则进行处理。（ ）
A.正确
B.错误
[简答题]依据《国网陕西省电力公司关于印发反违章工作规范的通知》,违章按照性质分为那三类?
[多选题]3061对于电力产品来说,()等皆属于电力的特征。 ( )
A. 分时
B. 不同功率因数
C. 随时可间断
D. 峰谷
