热门试题:
[单选题]电缆绝缘中如含有水分,会对其绝缘性能产生影响,纸绝缘的体积电阻率和击穿电压随含水量增加而( )。( )
A.明显降低
B.缓慢降低
C.维持不变
D.略有上升。
[单选题]‐1102电容器的电容量与加在电容器上的电压(()
A.成正比
B.成反比
C.无关
D.无规则变化
[判断题]机械的连杆机构能把运动传递到较远在养路机械中常用于传递运动和操纵装置。( )
A.正确
B.错误
[单项选择]先天下之忧而忧,后天下之()。
A. 乐而乐
B. 利而利
C. 义而义
D. 能而能
[简答题]1.一些大学生认为住在校园里好。
2.一些大学生认为住在校外好。
3.你的看法。
[单选题]通信前置机工控机的型号为( )。
A.HP Z621
B.HP Z421
C.研华611H
D.研华621H
[填空题]中性点直接接地系统,当发生单相金属性接地时,故障点零序电压 ,变压器中性点零序电压为零()
[单项选择]PET显像所使用的射线和能量是()
A. 511Kev的单光子
B. 1.02Mev的双光子
C. 511Kev的X射线
D. 511Kev的双光子
E. 1.02Mev的单光子
[多选题] 安全工器具使用前的外观检查应包括绝缘部分有无(),固定连接部分有无松动、锈蚀、断裂等现象。
A.裂纹
B.老化
C.绝缘层脱落
D.严重伤痕
[多选题]以下选项由交强险死亡伤残负责赔偿的是()
A.误工费
B.医药费
C.整容费
D.精神损害抚慰金
[简答题]试论述在小学数学教学中应如何培养学生初步的空间观念。
[单项选择]第一心音标志着 ( )
A. 心室收缩开始
B. 心室舒张开始
C. 心房收缩开始
D. 心房舒张开始
[单选题][238]可以从示波器的波形图上读出被测电压或电流的幅度、( )、频率、脉冲宽度及相位等参数。
A. 周期
B. 带宽
C. 功率因数
D. 起振时间
[单选题]空调系统混合组件装置将哪里的空气进行混合?
A.空调组件新鲜冷空气,再循环后的客舱空气,应急冲压空气入口空气及地面低压进气口空气
B.空调组件新鲜冷空气,应急冲压空气入口空气及地面低压进气口空气
C.再循环后的客舱空气,应急冲压空气入口空气
D.驾驶舱和客舱的空气
[单选题][单选题]能刺激甲状腺腺体增生和甲状腺激素分泌的物质是
A.TRH
B.TSH
C.CRH
D.T3,T4
E.ACTH
[判断题]温度的测定目前常用摄氏温度(℃)和国际温标(K)。( )
A.正确
B.错误
[多选题]有下列( )行为之一,造成不良影响的,给予警告处分。
A.在工作中对群众态度蛮横、行为粗暴、故意刁难或者吃拿卡要的
B.不按规定着装,严重损害人民警察形象的
C.非因公务着警服进入营业性娱乐场所的
D.受雇于任何组织、个人的
[单项选择]
The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that 40 percent of cancer is related to the diet as well, especially cancer of the colon. Different cultures ate more prone to get certain illnesses because of the food that is characteristic in these cultures. That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates and nitrites, commonly used to preserve color in meats, and other food additives, caused cancer. Yet these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives that we eat are not all so direct. Farmers often give penicillin to beef and poultry, and because of this, penicillin has been found in the milk of treated cows. S
A. They preserve flavor in packaged foods.
B. They preserve the color of meats.
C. They are the objects of research.
D. They cause the animals to become fatter.
[单选题]副交感神经兴奋可引起
A.瞳孔扩大
B.糖原分解
C.胃肠运动增强
D.骨骼肌血管舒张
E.竖毛肌
[单项选择]1 In the nineteenth century, Americans were becoming more familiar with European homes and luxuries. When "period" furniture became popular, American furniture factories attempted to duplicate various styles of French and English furniture of the seventeenth and eighteenth centuries. At the same time, designers in England were attempting a return to handicrafts as a means of self-expression. William Morris and other leaders of the English Arts and Crafts movement created home furnishings that celebrated the individuality of the designer.
2 In the United States, a similar movement soon followed. The American Arts and Crafts-or Craftsman--movement was based not only on individualism but also on a return to simplicity and practicality. Like the Arts and Crafts furniture in England, the Craftsman furniture in America represented a revolt from mass-produced furniture. Makers of Craftsman furniture sought inspiration in human necessity, basing their furniture on a res
A. Reproductions of earlier styles
B. Furniture that is made by hand
C. The last pieces made in any style
D. Nineteenth-century designer furniture
[判断题]不间断电源的整流、逆变、静态开关各个功能总体试验合格,就能进行整个不间断电源试验。( )
[单选题]每辆车每侧安装有[]个车门。
A.2
B.3
C.4
D.5
[多选题]在处置易燃易爆气体或者可燃液体泄漏事故时,车辆严禁停靠在( )上方及其附近。
A.地沟
B.窨井
C.管道
D.坡道
[单项选择]悬挂内、外钳的滑轮其公称载荷应不小于(),滑轮固定用ф12.7mm的钢丝绳绕两圈卡牢。
A. 10Kn
B. 20Kn
C. 30Kn
[单选题]( )是权力正确运行的根本保证,是加强和规范党内政治 生活的重要举措。
A.监督
B.执纪
C. 问责
D.公开
[不定项选择题]A.主动-被动型模式
A.指导-合作型模式
B.共同参与型模式
C.初始期
D.工作期
E.主要任务是建立信任关系,确定病人的需要
[多选题]井下供电必须做到的“三坚持”是指( )。
A.坚持使用电动机综合保护
B.坚持使用三大保护
C.坚持使用检漏继电器
D.坚持使用煤电钻、照明、信号综合保护
E.坚持使用风电闭锁
F.坚持使用风电和瓦斯电闭锁
[单选题]以下说法错误的是( )
A.农村信用社不得接受已经设置抵押的抵押物重复抵押
B.农村信用社不得接受在一年内可能进入破产程序的企业法人、其他组织对原来没有财产担保的债务提供抵押担保。
C.农村信用社可以接受以该抵押物的价值大于已担保债权的余额部分再次抵押
D.农村信用社不可以接受以该抵押物的价值大于已担保债权的余额部分再次抵押
[单选题]现场作业发生安全阀起跳事件时,应进行紧急停机处理,待安全阀()后,再进行相应的检查和处理。
A.A.自动关闭
B.B.自动开启
C.C.关闭
D.D.开启
E.略
F.略
G.略
[填空题]根据供电电源电压等级的不同,供电方式可以分为()和()。
[判断题]表格可以布局网页。( )
A.正确
B.错误
[单选题]资本主义社会的商品价值中,既是新创造价值的一部分,又是生产成本的一部分的,用公式表示是( )。
A. v
B. v+m
C. c+v
D. m
[单选题] 基础的位置应保证视线良好,物料提升机任意部位与建筑物或其他施工设备间的安全距离不应小于( )m。
A.2
B.1.5
C.0.6
D.1