热门试题:
[判断题]0.0141、25.74、321.3674三个数中,321.3674的绝对误差最大,故三数之和的有效数字应保留至小数点后四位。
[多选题]B-H-E-003 3 7 5
保持电缆头喇叭口导线形状的目的,( )的说法是错误的。
A. 保持电缆绝缘
B. 提高机械强度
C. 改善电场分布
D. 改善外观
[单项选择]有关输卵管结构正确的是()
A. 平滑肌蠕动方向是自内向外
B. 内膜上皮为低柱状上皮,有纤毛
C. 壶腹部是管腔最狭窄的部分
D. 间质部是管壁最厚的部位
E. 由浆膜层、肌层、黏膜下层及黏膜层4层构成
[判断题]桥梁的弹性挠度主要是指恒载挠度。
A.正确
B.错误
[判断题]气相色谱定量分析中,在一定的色谱操作条件下,流入检测器的待测组分的含量与检测器的响应信号(峰面积A或峰高h)成反比。()
A.正确
B.错误
[多项选择]G县人民法院在审理一起体罚、虐待被监管人案件时,被害人申请法院审判委员会委员王某、刑一庭庭长刘某、参加本案合议庭的人民陪审员陈某及辩护方提出传唤的证人锁某回避。请问,下列选项中,哪些属于应当回避的人员?
A. 审判委员会委员王某
B. 刑一庭庭长刘某
C. 人民陪审员陈某
D. 证人锁某
[多选题][TW]B-E-C-001373
广播系统系统检测可以检测哪些设备的工作状态()
A.自动检测倒机
B.噪声检测
C.自动广播
D.回路检测
[判断题]党的基层委员会设立纪律检查委员。
A.正确
B.错误
[配伍题]上颌窦病变首选() |内听道病变首选() |脑积水首选() |蝶窦病变应首选() |额窦病变应首选()
A. 头颅后前位
B. 柯氏位
C. 瓦氏位
D. 鼻窦侧位
E. 斯氏位
[多选题] 被许可人需要延续依法取得的行政许可的有效期的,行政机关应当( )。
A. 根据申请,在该行政许可有效期届满前作出是否准予延续的决定
B. 根据申请,在该行政许可有效期届满三十日前作出是否准予延续的决定
C. 行政机关逾期未作决定的,视为准予延续
D.行政机关逾期未作决定的,视为不准延续
[填空题]《本草备要》附药图461幅,多引《()》《()》及金元各家论说,本人见解注明“()”
[判断题]一般情况下,在发生横向倾覆之前先产生横向滑移现象,因此在道路设计中应保证汽车不产生横向滑移,同时也就保证了横向倾覆的稳定性。()
[单项选择]以下不属于鸡血藤的主治证的是
A. 肢体瘫痪
B. 月经不调
C. 风湿痹痛
D. 小便不利
[单项选择]下列菜品中无法实施“烹中调味”的是()。
A. 香炸猪排
B. 银芽鸡丝
C. 黄焖鸡翅
D. 平桥豆腐
[单项选择]瑞氏染色后,油镜下胞核呈单个、圆形,染色质粗大块状,胞质呈透明、淡蓝色的白细胞为()。
A. 中性粒细胞
B. 嗜酸性粒细胞
C. 淋巴细胞
D. 单核细胞
E. 嗜碱性粒细胞
[单项选择]以下哪项不是导致便秘的常见原因()
A. 胃火
B. 肝胃不和
C. 阴血不足
D. 寒凝胃肠
E. 津液亏虚
[单选题]电气主接线最基本的要求是(____)。
A.保证供电可靠性和电能质量
B.接线简单、运行灵活
C.操作简便
D.经济合理
[填空题]学校事故就其产生而言,可以分为两大类。一类是______事故,另一类是______事故。
[单项选择]( )是我国的根本政治制度。
A. 社会主义制度
B. 人民民主专政制度
C. 民主集中制度
D. 人民代表大会制度
[不定项选择题]共用题干
Electromagnetic Energy
1 White light seems to be a combination of all colors.The energy that comes from a source of light is not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy day it is possible to get a sunburn even though you feel cool.Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.
2 The sun is 93 million miles from the earth.Yet we can use energy from the sun because electromagnetic energy travels through space.
3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals travel from transmitters to receivers as low-energy electromagnetic waves.Infrared(红外线的)radiation is an electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light have more energy than waves of radio,television,or radar.Ultraviolet rays(紫外线)and X-rays are electromagnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living.Ultraviolet radiation is useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel through solid objects. They can be used to detect and treat cancer.X-rays are used in industry to find hidden cracks in metal,and in medicine to reveal broken bones.
4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but the energy stored in coal came from the sun,too.
5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the theory was proposed , nuclear energy was harnessed(利用)by man.Chemical energy comes from electron (电子)rearrangement.Nuclear energy comes from a change in the nucleus of an atom.Compared with chemical reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium(氦).
6 Nuclear energy is beginning to compete with coal as an economical source of'power to generate electricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better methods of obtaining and using energy.
Paragraph 5______
A.Nuclear Reactions as the Lasting Source of the Sun's Energy
B.The Most Important Source of Energy
C.Types of Electromagnetic Energy
D.The Machines Used for Energy Generation
E.Seeking New Sources of Energy
F.The Use of Ultravio1et Radiation in Medicine
[判断题]机动车在高速公路上行驶,可以在应急车道行驶或者停车。
。
A.正确
B.错误
[判断题] 杆塔、配电变压器和避雷器的接地电阻测量工作,必须在线路和设备停电的情况下进行。( )
A.正确
B.错误
[判断题]如果将电压表串入电路中,串入电路将呈开路状态。 ( )
A.正确
B.错误
[单选题]说到底,高校的办学特色主要体现在()。
A.高水平的教师和高质量的毕业生;
B.先进的办学理念;
C.校长的卓越领导和创新实践;
D.优势学科
[单选题]以下哪部党章是我们党历史上唯一一次不是由党的代表大会通过的党章?
A.《中国共产党第三次修正章程决案》
B.《中国共产党第二次修正章程决案》
C.《中国共产党纲领》
D.《中国共产党第一次修正章程》
[单选题]A.SIgA
A.IgE
B.IgC
C.IgD
D.IgM
[单项选择]研究认为,为了提高复习的效果,第四次复习的时间应该安排在()。
A. 一星期后
B. 半个月后
C. 一个月后
D. 半年后
[单选题]《危险化学品安全管理条例》规定,( )核发剧毒化学品购买许可证、剧毒化学品道路运输通行证,并负责危险化学品运输车辆的道路交通安全管理。
A.安全生产监督管理部门
B.公安机关
C.环境保护主管部门
D.地方人民政府
[判断题] 液化石油气的燃烧温度可达2000℃;爆炸时的火焰温度可达2800℃。( )
A.正确
B.错误
[多选题]区块链的显著特点包括( )。
A.去中心化
B. 安全
C.匿名
D.透明
[单选题]开闭所中使用的SF6负荷开关大多数为( )负荷开关。
A.A.二工位
B.B.三工位
C.C.四工位
D.D.五工位
[单选题]表示磁场大小和方向的量是( )
A.磁通
B.磁力线
C.磁感应强度
D.磁力
[单项选择]
Questions 16 to 20 are based on
the following talk. |
A. (A) The modern electronic anti-noise devices are an update version of the traditional methods.
B. (B) The modern electronic anti-noise devices share similarities with the traditional methods.
C. (C) The modern electronic anti-noise devices are as inefficient as the traditional methods.
D. (D) The modern electronic anti-noise devices are based on an entirely new working principle.
[单选题]根据《国家电网公司输变电工程 设计变更与现场签证管理办法》的规定,()负责所辖范围内输变电工程设计变更与现场签证的日常管理。
A.A、省公司基建管理部门
B.B、业主项目部
C.C、国网基建部
D.D、建设管理单位
[单选题]铝及铝合金、( )不宜用埋弧焊焊接。
A.钛及钛合金
B.镍合金
C.奥氏体不锈钢
D.调质钢
[单项选择]{{B}}第二篇{{/B}}
{{B}}Japanese Car
Keeps Watch for Drunk Drivers{{/B}} A concept car developed by
Japanese Company Nissan has a breathalyzer-like detection system and other
instruments that could help keep drunk or over-tired drivers off the
road. The car’s sensors check odors inside the car and monitor a
driver’s sweat for traces of alcohol. An in-car computer system can issue an
alert or even leek up the ignition system if the driver seems over-the-limit.
The air odor sensors are fixed firmly and deeply in the driver and passenger
seats, while a detector in the gear-shift knob measures perspiration from the
driver’s palm. Other carmakers have developed similar detection
systems. For example, Sweden’s Volvo has developed a breathalyzer attached to a
car’s seat belt that drivers must blow into before the A. The same detection system mentioned in the previous paragraph. B. A breathalyzer attached to a car’s seat belt. C. A smart car seat belt. D. An intelligent engine.
[单选题]自动扶梯制动器,是靠( )使其制动的。A.挡板;B.摩擦 C.锯齿 .拉力 A.A B.B C.C D.D
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