热门试题:
[单选题]每个防火分区应至少设置一只手动火灾报警按钮。从一个防火分区内的任何位置到最邻近的手动火灾报警按钮的步行距离不应大于()。
A.40m
B.20m
C.30m
D.50m
[单选题]线路中断，列车不能继续运行时，应（ ）被阻旅客。
A.尽量安排
B.通知
C.疏散
D.妥善安排
[判断题]焊工当遇到工况条件与焊接作业指导书及焊接技术措施的要求不符合时，可视情况而定是否继续进行施焊。
A.正确
B.错误
[单项选择]下列文学常识的表述不正确的一项是（）
A. 章回小说中常出现“话说”“看官”等字眼，可明显看到话本的痕迹与影响
B. “论”是一种以论证为主要议论方式，以析透彻为宗旨，一般而言，人物论、史论等较庄重的内容大多采用这一文体，如贾谊的《过秦论》、苏洵的《六国论》
C. 疏也称奏疏、奏章，是臣下向君王进言的文书。一般采用分条陈述的方式，贾谊的《论积贮疏》是疏中的名篇
D. 唐宋传奇是魏晋笔记小说上发展起来的一种情节曲折奇特，结构完整的短篇小说，《灌园叟晚逢仙女》就是其中的名篇之一
[不定项选择题]共用题干
Learn about Light
1 .Ancient civilizations were amazed by the existence of light for thousands of years. The Greek philosophers believed that light was made up of countless,tiny particles that enter the human eye and create what we call vision. However,Empedocles and a Dutch scientist named Christian Huygens believed that light was like a wave. According to them,light spread out and travelled like a straight line. This theory was accepted during the 19th century.
2 .In 1905,Albert Einstein published a research paper in which he explained what is re-ferred to as the photoelectric effect. This theory explains that particles make up light.The particles Einstein was referring to are weightless bundles（束）of electromagnetic（电磁）energy called photons（光子）.Today,scientists agree that light has a dual（二重）nature一it is part particle and part wave. It is a form of energy that allows us to see things around us.
3 .Things that give off light are known as sources of light. During the day,the primary source of light is the sun. Other sources of light include stars,flames,flashlights,street lamps and glowing gases in glass tube.
4 .When we draw the way light travels we always use straight lines. This is because nor-mally light rays travel in a straight line. However,there are some instances that can change the path and even the nature of light. They are reflection,absorption,interference（干扰）, etc.
5 .Physicists have attempted to measure the speed of light since the early times. In 1849, Hippolyte Fizeau conducted an experiment by directing a beam of light to a mirror located kilometers away and placed a rotating cogwheel（旋转齿轮）between the beam and the mirror. From the rate of rotation of the wheel,number of wheel's teeth and distance of the mirror,he was able to calculate that the speed of light is 313 million meters per second. In a vacuum（真空）,however,the speed of light is 299,792,458 meters per second. This is about a million times faster than the speed of an airplane.
Paragraph 3______
A.How Is the Nature of Light Explained Today?
B.What Are Sources of Light?
C.How Did Physicists Measure the Speed of Light?
D.How Does Light Travel?
E.How Did People Think of Light Years Ago?
F.What Causes a Shadow?
[单选题] 井场.站场电缆埋地深度不小于( )。
A. 30cm
B.50cm
C.70cm
D.90cm
[单项选择]
In October 2002, Goldman Sachs and Deutsche Bank (1) a new electronic market (www.gs.com/econderivs/) for economic indices that (2) substantial economic risks, such as nonfarm payroll ( a measure of job availability) and retail sales. This new market was made possible by a (3) rating technology, developed by Longitude, a New York company providing software for financial markets, (4) the Parimutuel Digital Call Auction. This is "digital" (5) of a digital option : ie, it pays out only if an underlying index lies in a narrow, discrete range. In effect, Longitude has created a horse race, where each "horse" wins if and (6) the specified index falls in a specified range. By creating horses for every possible (7) of the index, and allowing people to bet (8) any number of runners, the company has produced a liquid integrated electronic market for a wide array of options on economic indices.
A. for
B. in
C. on
D. up
[判断题]中国在2007年成为金融行动特别工作组（FATF）正式成员。
A.正确
B.错误
[单项选择]属于音频电疗法的是（）。
A. 感应电疗法
B. 等幅中频电疗
C. 正弦调制中频
D. 静态干扰电疗
E. 音乐-电疗法
[单选题]需要进行定期计量检定的仪器、器具有()。
A.瓷舟
B.分析天平和热电偶
C.称量皿.
[单项选择]下列除哪项外均为药材羚羊角的性状鉴别特征（）
A. 长圆锥形，表面类白色或黄白色
B. 嫩枝有"血丝"，光润如玉；老枝有细纵裂纹
C. 从尖部开始，表面有隆起的环脊，用手握之，四指刚好嵌入凹处，习称"合把"
D. 骨塞长占全角的1/2～1/3
E. 对光透视，上部无骨塞部分中心有一条细孔直通角尖，习称"通天眼"
[单选题]直埋光缆接头的埋深应与该位置直埋光缆的埋深一样，在坑底铺细土或细砂防护的情况下，接头盒上方要埋上（ ）cm的细土或细砂然后进行下一道工序。
A.10
B.20
C.30
D.40
[单项选择]患者，女性，31岁，一年前因宫外孕出血输血1200mL，半年来出现发热，乏力纳差，多次检查ALT＞200U/L，抗HCV阳性，HAVIgG抗体（+），抗HBsAg（+）。该患者最可能的诊断是（）。
A. 甲型病毒性肝炎
B. 乙型病毒性肝炎
C. 丙型病毒性肝炎
D. 丁型病毒性肝炎
E. 戊型病毒性肝炎
[判断题]当灯具达不到最小高度时，应采用24V以下电压。( )
A.正确
B.错误
[判断题]在一次设备、控制保护屏等运行设备上引取测量信号，应在送电前接好线，不需办理工作票。
A.正确
B.错误
[单项选择]The head of the Australian government is the_____.
A. British monarch, represented by a governor-general
B. President
C. Prime Minister
D. Queen
[多项选择]电子产品对其生产环境的特殊要求有（）。
A. 空气洁净度要求
B. 空调恒温恒湿要求
C. 防高振要求
D. 防静电要求
E. 电磁环境和电磁屏蔽要求
[单选题]知识点：脱氨基
肌肉中氨基酸脱氨基作用的主要方式
A.脱羧基作用
B.谷氨酸氧化脱氨基作用
C.转氨基
D.嘌呤核苷酸循环
E.联合脱氨基
[判断题]采掘工作面及其他作业地点风流中、电动机或其开关安设地点附近20米以内风流中的瓦斯浓度达到1.0%时，必须停止工作、切断电源、撤出人员，进行处理。
A.正确
B.错误
[单项选择]患者，47岁，男性，肺癌病史，超声检查发现肝内多发低回声区，边界不清，内回声欠均，CDFI：低回声区内未见明显血流信号，考虑为转移性肝癌肝脏哪一部位的病灶最易漏诊（）
A. 肝叶
B. 肝尾叶
C. 肝右后叶
D. 肝膈顶部
E. 肝右前叶
[单选题]2.459. 第459题 土地复垦费和植被恢复费一般是施工租用场地到期后进行复垦和植被恢复发生的费用,计入()
A.土地征用补偿费
B.迁移补偿费
C.余物清理费
D.施工场地租用费
[单项选择]一继发性腹膜肿瘤少见于下列哪项（）
A. 胃
B. 子宫
C. 前列腺
D. 胰腺
E. 结肠
[判断题]禁止作业人员擅自移动或拆除遮栏（围栏）、标示牌。
A.正确
B.错误
[多项选择]可以阻断亚硝胺合成的为______。
A. 维生素C
B. 维生素E
C. 维生素A
D. 茶叶
[多选题]遇雷雨天气，严禁在接触网下使用（ ）。
A.草帽
B.金属材质雨伞
C.金属质杆信号旗
D.雨衣
[多选题]特殊环境、特殊吊件等施工作业应编制（ ）或（ ），必要时还应经专家论证。
A.专项安全施工方案
B.专项安全技术措施
C.专项质量控制措施
D.作业指导书
[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
[填空题]风电机控制系统参数及远程监控系统实行（），未经授权不准越级操作。系统操作员设在（）。系统操作员对于保证系统（）和（）负有直接责任。
[判断题]雷暴日是衡量雷电活动频繁程度的电气参数,一般平原较山地雷暴日多,我国的南方比北方雷暴日多。
A.正确
B.错误
[单选题]下列关于系统性红斑狼疮的临床表现,叙述不正确的是: ( )
A.最具特征的皮肤黏膜表现为面部红斑
B.尿毒症是系统性红斑狼疮常见的死亡原因
C.神经系统表现中,严重头痛可以是系统性红斑狼疮的首发症状
D.多表现关节痛、关节炎,多引起关节畸形
[单选题]列车拉铁鞋开车，该事故为（ ）事故。
A.一般A类
B.一般B类
C.一般C类
D.一般D类
