热门试题:
[单项选择]有两个基本关系:学生(学号,姓名,系号),系(系号,姓名,系主任),学生表的主码为学号,系表的主码为系号,因而系号是学生表的________。
A. 主码(主键)
B. 外码(外关键字)
C. 域
D. 映像
[多项选择]下列成本费用中,属于取得成本的是()
A. 材料的采购成本
B. 在材料储备上占用资金而支付的利息
C. 储存中的损耗和保险费
D. 订货费用
E. 延期交货支付的罚金
[单项选择]颈内动脉虹吸段一般分为()。
A. 2段
B. 3段
C. 4段
D. 5段
E. 6段
[单选题]念珠菌性阴道炎白带的特点:
A. 泡沫状
B. 脓性
C. 干酪样或豆渣样
D. 乳白色粘液状
[多选题]逻辑证明不能成为检验真理的标准是因为()。
A. 逻辑证明不能回答结论是不是符合实际的问题
B. 逻辑证明了的东西还必须经过实践检验
C. 逻辑证明对获得正确认识没有帮助
D. 逻辑证明作为感性认识不能认识本质
[单选题]不按工作票要求布置安全措施,工作负责人应负()
A.主要责任
B.次要责任
C.直接责任
D.连带责任
[单项选择]
In what now seems like the prehistoric times of computer history, the earth’s postwar era, there was quite a wide-spread concern that computers would take over the world from man one day. Already today, less than forty years later, as computers are relieving us of more and more of the routine tasks in business and in our personal lives, we are faced with a less dramatic but also less foreseen problem. People tend to be over-trusting of computers and are reluctant to challenge their authority. Indeed, they behave as if they were hardly aware that wrong buttons may be pushed, or that a computer may simply malfunction.
Obviously, there would be no point in investing in a computer if you had to check all its answers, but people should also rely on their own internal computers and check the machine when they have the feeling that something has gone wrong.
Questioning and routine double-checks must continue to be as much a part of good business as they were in pre
A. challenging
B. dramatic
C. psychological
D. fundamental
[单选题]架高超过( )m且有风涡流作用时,应采取抗上升返流作用的连墙措施.
A.12
B.15
C.24
D.40
[单项选择]种群在逻辑斯谛增长过程中,密度增长最快时的个体数量为()。
A. 小于K/2
B. 等于K
C. 等于K/2
D. 大于K/2
[判断题]根据《山东省安全生产条例》,任何单位和个人对事故不得迟报、漏报、谎报或者瞒报。
A.正确
B.错误
[单项选择]2012年1月1日,甲公司自证券市场购入面值总额为1000万元的债券,该债券发行日为2011年1月1日,系分期付息、到期还本债券,期限为5年,票面年利率为5%,每年12月31日支付当年利息。甲公司购入该债券时,上一年的利息尚未兑付,甲公司实际支付价款1078.98万元,另外支付交易费用10万元。经测算甲公司的内含报酬率为3.93%,甲公司将该债券作为持有至到期投资核算。该持有至到期投资2013年12月31日的账面价值为()万元。
A. 1062.14
B. 1068.98
C. 1020.28
D. 1083.43
[单项选择]
30岁男性,持续发热20天,伴有周身不适,巩膜轻度黄染,体温39℃,神志清,表情淡漠,肝肋下2.0cm,脾肋下1.0cm,白细胞3.0×109/L,中性80%,淋巴20%。
在腔道内(呼吸道、消化道、泌尿道)起保护作用的是()
A. IgG
B. IgM
C. IgA
D. IgE
E. IgD
[单项选择]CorelDRAW10.0中在页面导航器右方新增了对象导航器,那么它的作用是?()
A. 察看被选种的对象
B. 察看工作区中的对象
C. 察看页面中所有对象
D. 全屏显示的快捷方式
[判断题]对于旅行社质量保证金赔偿的时效期限为90天。时效期限以请求人知道或者应当知道侵害事实发生时计算,超过时效的请求可以不予受理。 ( )
[判断题]矿井通风的目的就是为了排除井下瓦斯。
A.正确
B.错误
[单项选择]与现金持有量负相关的现金成本是( )。
A. 持有现金的管理费用
B. 丧失的再投资收益
C. 转换成本
D. 现金短缺成本
[判断题]高碳炉水冷区蒸汽冒出时,剪断并拉出炉内丝束,关闭去DFTO的排废阀门。
A.正确
B.错误
[单项选择]工作日通常保持()小时工作(操课)和()小时睡眠,并规定起床、早操、洗漱、开饭、课外活动和点名时间。
A. 八十
B. 八八
C. 十八
[填空题]使用钟机式控制器时,应考虑取样井液体的()大小。
[单项选择]How exactly, does science work How do scientists go about doing science Ordinarily we think science proceeds in a straight-forward way. Ideally scientists make observations, formulate hypotheses (假设), and test those hypotheses by making further observations. When there is difference between what is observed and what is predicted by the hypothesis, the hypothesis is revised. Science proceeds in this way, which is a gradual method of finding the best fit between observation and prediction.
But this idealized version of how one does science is naive. Although science demands proof that observations made by one observer be observable by other observers using the same methods, it is by no means dear that, even when confronted with identical phenomena, different observers will report identical observations. And it is most certain that, even if the same observations are made, the conclusions as to the meaning of the observations frequently differ.
The fact is that all of us, s
A. they had not much experience in building such a model of ship
B. it was too familiar to attract their attention
C. it was too far away from the coast
D. they had never met with big sailing ships like that before
[单项选择]
A new came as a surprise that an elderly woman died yesterday after (21) knocked down by a motorist who had made no (22) to brake (刹车) . A police officer asked the driver, a man of 69, to read the number-plate of a car parked (23) the opposite side of the road. The man said this was (24) , because it was foggy. In fact, it was a sunny day. After several attempts, even from a distance of two meters, the man (25) failed to read the number-plate (26) He said he had never needed (27) , though he had been (28) in a similar accident (29) .
The question of fitness to (30) comes (31) every time some medical condition relates to an accident like this. Last week two motorists died (32) blackouts (瞬间昏厥) at the wheel, With these (33) in mind, it is not surprising that accident prevention organizations are trying to (34) the government to introduce stricter controls over (35) so th
A. yesterday
B. tomorrow
C. before the day
D. the day before
[单项选择]可用于口腔内及创口消毒的是()
A. 2%戊二醛
B. 0.1%水洗必泰
C. 0.5%醇洗必泰
D. 甲酚醛
E. 1%过氧化氢溶液
[判断题]译码器、计数器、全加器和寄存器都是组合逻辑电路。( )
A.正确
B.错误
[单选题]以下不是导航飞控系统组成部分的是( )。
A.传感器
B.电台
C.执行机构
[简答题]我们通常用把夫妻新婚过后休假的一段时间叫什么月?
[单选题]车站在使用道岔除雪设备过程中,温度一般由( )预先调节好。
A.值班站长
B. 行车调度员
C. 信号人员
D. 车站值班员
[单选题]下面是对我国一份近代历史文献的描述:是一份改革内政和建设国家的新方案;是发展资本主义的近代化纲领;因脱离当时社会现实而未能实施。这份文献可能是:
A.《海国图志》
B.《资政新篇》
C.《天朝田亩制度》
D.《中华民国临时约法》
[填空题]桂盛信用卡进行大额分期时,金额最低为(),最高暂定为()。
[填空题]
More Rural Research Is Needed
1. Agricultural research funding is vital if the world is to feed itself better than it does now. Dr. Tony Fischer, crop scientist, said demand was growing at 2.5% per year, but with modern technologies and the development of new ones, the world should be able to stay ahead.
2. "The global decline in investment in international agricultural research must be reversed if significant progress is to be made towards reducing malnutrition and poverty," he said.
3. Research is needed to solve food production, land degradation and environmental problems. Secure local food supplies led to economic growth which, in turn, slowed population growth. Dr. Fischer painted a picture of the world’s ability to feed itself in the first 25 years, when the world’s population is expected to rise from 5.8 to 8 billion people. He said that things will probably hold or improve but there’ll still be a lot of hungry peop
[多选题]督部门、工商行政管理部门、消防救援机构工作人员在消防产品监督管理中( )的,依法给予处分。
A.滥用职权。
B.玩忽职守。
C.徇私舞弊。
D.贪污腐败。
[单项选择]循环水中控制微生物的繁殖,主要靠加杀菌剂和()来实现。
A. 氧气
B. 氮气
C. 氯气
D. 空气
[多选题]有下列情形之一的,上海市消防局提前30日以书面形式通知政府专职消防员本人或者额外支付其1个月工资后,可以解除劳动合同: ( )
A.政府专职消防员患病或者非因工负伤,在规定的医疗期满后不能从事原工作,也不能从事由上海市消防局另行安排的工作的。
B.政府专职消防员不能胜任工作,经过培训或者调整工作岗位后,仍不能胜任工作的。
C.劳动合同订立时所依据的客观情况发生重大变化,致使劳动合同无法履行,经上海市消防局与政府专职消防员协商,未能就变更劳动合同内容达成协议的。
D.政府专职消防员严重失职,营私舞弊,给单位造成经济损失1万元以上的
[单选题]根据《中国农业发展银行绿色信贷指引(2021年修订)》,在调查阶段,应披露与分析环境和社会风险。建立( )环境和社会风险信息收集机制。
A.总、分、支三级
B.总、分两级
C.分、支两级
D.总、支两级
[单选题]处置交通事故,应当调派( )
A.抢险救援车、举高车等车辆和生命探测仪、漏电检测、燃气侦检、救生、破拆、牵引、起吊、支撑等特种器材。
B.抢险救援车、泡沫车等特种车辆和侦检、警戒、救生、破拆、牵引、起吊等特种器材。
C.防化救援车、洗消车、泡沫车等特种车辆和防护、侦检、警戒、堵漏、输转、洗消等特种器材。
[判断题]操作公铁两用车作业者与1号作业者联控进行轮对和镟轮床对位时,当3个指示灯同时亮起时表示对位完成。
A.正确
B.错误
[多选题]辊筛岗位交接班验收项目有( )。
A.设备
B.生产
C.安全
D.现场
E.环境
[单选题]高速铁路突发事件应急响应分为( )级。
A.3
B.4
C.6
D.8
[多选题]台风过后,场地设备可能会出现的情况有( )。
A.小车、起升速度只有一档
B.司机室进水
C.围网倒塌
D.箱区有箱子被吹移位
E.龙门吊断电