热门试题:
[填空题]设X→Y是关系模式R的一个函数依赖，并且Y不是X的子集，则称X→Y是______。
[单项选择]I don' t think it (advisable) that he (will) be assigned (to) the job (since) he has no experience.
A. advisable
B. will be
C. to
D. since
[单选题] 某输电线路的TA变比为600/5,TV变比为220kV/100V,则当二次功率为20W时一次功率为()MW。
A. 4.8
B. 528
C. 5.28
D. 480
[多项选择]颈清扫术应该遵循下列哪些原则（）
A. 切口不宜过长
B. 保证皮瓣的血供
C. 充分暴露术野
D. 充分游离颈内静脉
E. 避免切口与颈总动脉不在同一直线上
[判断题]高压清洗机主要用于化学灾害救援中人员的洗消。（易）( )
A.正确
B.错误
[单选题]纯母乳喂养多长时间最好？（ ）
A.2个月
B.4个月
C.6个月
D.9个月
E.12个月
[多项选择]电压互感器的二次回路通电试验时，除应通知运行人员和有关人员，并派人到现场看守外，为防止由二次侧向一次侧反充电，还应采取下列什么措施？（）
A. 将通电的电源刀闸换较细的熔丝
B. 将二次回路断开
C. 将电压互感器一次侧接地
D. 取下电压互感器高压熔断器或拉开一次侧刀闸
[单项选择]
In China it is relatively usual to ask people their age, but in the West this question is generally regarded as impolite. This is particularly true 【B1】 women, and even more 【B2】 if the inquirer is a man. However, it is very 【B3】 to ask children their age, and some adults may not mind 【B4】 either. In fact, some elderly people are quite happy to 【B5】 their age, especially if they feel they look young 【B6】 their age. Nevertheless, it is not very wise to ask a(n) 【B7】 question like " How old are you". If elderly people want to talk about—their age, and perhaps receive a compliment on how young they look, they may easily 【B8】 the topic themselves, and ask the other person to 【B9】 how old they are. 【B10】 such a question, it is quite acceptable to discuss age 【B11】 . They normally expect to be complimented on their youthfulness, though rather than 【B12】 that they look very old! 【B13】 Westerners do not usually ask people directly how old they are, this does not 【B14】 tha
A. For
B. With
C. In
D. On
[单选题](6525)PGM-48型线路打磨列车打磨小车控制旋钮旋至( )位使打磨小车下降。
A.RAISE
B.HOLD
C.lower
D.FLOAT
[单项选择]关于英国民间组织保护文化遗产的经费来源，下列说法错误的是（）。
A. 政府预算
B. 民间捐赠
C. 经营收入
D. 拍卖收入
[单选题]属于感觉神经节的是
A.翼腭神经节
B.肠系膜下神经节
C.螺旋神经节
D.下颌下神经节
E.腹腔神经节
[判断题]电能量采集终端和专用通道一旦投入运行（含试运行）未经允许不得擅自停用。
[判断题]延迟裂纹是冷裂纹的一种常见缺陷。
A.正确
B.错误
[单项选择]长期的高亮度会使显示器（）。
A. 加速老化
B. 变形
C. 毁坏眼睛
D. 外壳变黄
[单选题]有毒有害物质沾染皮肤时,应立即去除衣物,用大量的水进行冲洗( )分钟以上,并彻底洗消,情况严重或沾染强腐蚀性和剧毒物质必须及时就医。
A.5
B.8
C.10
D.15
[单项选择]Where is George now.
A. Here.
B. Europe.
C. Canada.
D. California.
[单选题]对于案例中10kV带电设备，如果作业中人员与带电体之间设置隔离措施的情况，人员与设备带电部分的安全距离（ ）。(单选题)
A. 0.2m
B. 0.25m
C. 0.3m
D. 0.35m
[单选题]( )是人民群众最基本、最普遍的愿望。
A.环境优美
B.国泰民安
C.经济发达
D.共同富裕
[单项选择]脑血管意外的恢复机制中属于大脑“可塑性”范畴的是（）
A. 病损区水肿消退
B. 病损区血肿吸收
C. 半暗区细胞“休克期”过去
D. 颅内压的恢复
E. 病损同侧或对侧脑细胞代偿
[多选题]资本—帝国主义通过以下手段对中国进行侵略 ____ 。
A.军事侵略
B.政治控制
C.经济掠夺
D.文化渗透
[单项选择]下列关于气胸治疗叙述错误的是（）
A. 气胸治疗目的是促进肺脏复张、消除和控制复发
B. 对于无基础疾病症状较轻，肺脏压缩小于20%的患者无需穿刺排气，一般治疗：卧床休息、吸氧、止痛。气体可自行吸收
C. 闭合性气胸，气胸量大于20%可穿刺抽气，一般每次量控制在1500ml以内
D. 张力性气胸必须尽快排气
E. 交通性气胸采用闭式引流排气
[单选题]夜间、浓雾、暴风雨雪天气，给水吸污等作业人员须佩带使用（）
A.手电筒
B.方位灯
C.应急照明
D.口笛
[单选题]在组织建设工程流水施工时，某个专业工作队在一个施工段上的施工时间称为（ ）。
A.流水节拍
B.流水工期
C.流水步距
D.流水强度
[单选题]ZigBee无线通信技术的标准传输距离一般是。
A.100m-1km
B.10—75m
C.1km－2km
D.无限远
[单项选择]Task One-Job
·For questions 13-17, match the extracts with the people, listed A-H.
·For each extract, decide which job each speaker was interviewed for.
·Write one letter (A-H) next to the number of the extract.
A marketing manager
B computer programmer
C secretary
D personnel management assistant
E engineering manager
F maintenance supervisor
G finance director
H quality control manager______
[单选题]
采用简明、扼要的文字，迅速及时地报道人们所关注的、新鲜的、重要的关于人和事件情况的报道称为()。
A.通迅
B.消息
C.解说词
D.通知
[单选题]为了提高供电可靠性、经济性,合理利用动力资源,充分发挥水力发电厂作用,以及减少总装机容量和备用容量,现在都是将各种类型的发电厂、变电所通过( )连接成一个系统。
A.用电线路
B.输配电线路
C.发电线路
[多选题]
数据库管理的发展经历了(____)几个阶段。
A.面向应用模型代
B.层次网状模型代
C.关系模型代
D.面向对象模型代
[填空题] 列车重量标准，是根据机车牵引力、（ ）等因素，通过计算和牵引试验，并将各种类型机车牵引重量平衡后确定的。
[填空题]Everyone living in this society should communicate with each other. They get what they want by buying and sell what they don’t want by selling. The most important way is to buy or to sell. Today, buying and selling merchandise is a (36) business. Some practice it as a (37) trade; others regard it as a (38) requiring, what we say, is the (39) knowledge and also with so many years of (40) . The storekeepers in Frank Woolworth’s time knew nothing about this.
The idea of "a chain of stores" is buying directly from the (41) . Sometimes they could buy it in large (42) and selling in many different places (43) the country. It had its beginnings with Woolworth and others who followed them. (44) . These men had the great vision to see that the more the manufacturers produced, the greater would be the saving to the consumer.
Frank Woolworth was born in the town of Rodman in New York Stat
[单项选择] Suburb
If "suburb" is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization began during the emergence of the industrial city, in the second quarter of the nineteenth century. Before that period the city was a small, highly compact cluster in which people moved about on foot, and goods were conveyed by horse and cart. But the early factories, built in the 1830’’s and 1840’’s, were located along waterways and near railheads at the edges of cities, and housing was needed for the thousands of people drawn by the prospect of employment. In time, the factories were surrounded by proliferating mill towns of apartments and row houses around the older, main cities. As a defence against this encroachment, and to enlarge their tax bases, the cities appropriated their industrial neighbors. In 1854 for example, the city of Philadelphia annexed most of Philadelphia County. Similar municipal maneuvers
A. The smell of the factories.
B. The growth of mill towns.
C. The development of waterways.
D. The loss of jobs.
[单选题]城市高压配电线路的档距，一般是（ ）m。
A.A.40～50
B.B.40～60
C.C.50～60
D.D.60～100
[判断题]内燃机车启机时，机车副司机（非操纵司机）发现危及安全时，应立即通知司机停机。
A.正确
B.错误
[单选题]感染性心内膜炎最主要的诊断依据是
A.白细胞计数及分类
B.血红蛋白检查
C.血培养
D.红细胞沉降率
E.心肌酶
[单选题]根据《山东省安全生产条例》，省人民政府负有安全生产监督管理职责的部门可以在其法定职权范围内，将安全生产许可证审核事项委托（）实施。
A.设区的市人民政府负有安全生产监督管理职责的部门
B.县级人民政府负有安全生产监督管理职责的部门
C.下级政府负有安全生产监督管理职责的部门
D.具备条件的安全生产中介机构
[单项选择]根据《防止生猪价格过度下跌调控预案（暂行）》规定，在生猪生产进入（）时，应当及时向社会发布生猪市场预警信息。
A. 红色区域
B. 黄色区域
C. 蓝色区域
D. 绿色区域
[多项选择]为了提高加氢反应的深度，可适当提高氢分压，提高氢分压的正确方法有（）。
A. 降低尾氢排放量
B. 提高反应系统压力
C. 提高循环氢的纯度
D. 降低氢气纯度
