专业英语试卷A

Part I Vocabulary and Grammer

Directions: There are 20 incomplete sentences in this part. For each sentence there are four choices marked A, B and C. Choose the ONE answer that best completes the

sentence. (20 points)

( ) 1. The algebraic sum of the _____ entering any node(节点) is zero.

A．r eactance B. current C. voltage

( ) 2. The switch, resistor(电阻) and wire _____a circuit.

A.constitute

B. are composed of

C. made of

( ) 3. Materials _____allow current to flow with only a small applied voltage are called conductors.

A．/ B. whose C. that

Part II Matching

Directions: There are 10 Chinese phrases and 10 English phrases. Match the English

phrase with the correct Chinese phrase. (20 points)

1.电子线路（）

2. 发光二极管（）

3.功率源（）

4. 直流电（）

5.电子放大器（）

6.逻辑电路（）

7. 电压增益（）

8. 运算放大器（）

9. 短路（）10. 正向偏置（）

a. short circuit

Part III 句子填空

Part IV Translation

Section A

Directions: There are 10 phrases in this part. You are to translate the phrases into Chinese, and write them down in the blank. (20 points )

1.Ohm’s Law ______________

2.conductor ______________

3.semiconductor

4.chip

5.microwave

6.waveform

7.digital

8.frequency

9.current

10.circuit

Section B

Directions: There are 5 sentences in this part. You are to translate the phrases into

Chinese, and write them down in the blank. (20 points )

(a)The primary purpose of an electric circuit is to move charges along specified paths.

(b)The basic building block of most semiconductor devices is the diode.

(c)Electronic amplifiers are used mainly to increase the voltage, current, or power of a signal.

(d)The key to the transistor’s rapid development was the use of silicon instead of wire.

(e)Logic circuits are used to make specific true-false signals at the inputs.

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电信专业英语期末试卷B及部分谜底

20 07 －20 08 学年第 1 学期课程名称专业英语试卷卷别 A □ B √ 专业级班级考试方式闭卷 √ 开卷 □ 本试卷共八大题( 6 页)，满分100分，考试时间120分钟。请在答题纸上作答，在试卷上作答无效。考生信息栏系专业级班级姓名学号装订线一、根据英文单词或词组，写出中文意思（本题共15小题，每题1 分，共15分） 1. insulator 绝缘子 2. conductor 导体 3. pulse 脉冲 4. sensor 传感器5. manual 手册 6. modulate 调制7. nucleus 核 8. oscilloscope 示波器 9. hardware 硬件10.multimedia 多媒体 11.terminal controllers 终端控制器 12.downlink frequency spectrum 下行频谱 13.wireless telephone 无线电话 14.power cord 电源线 15.forward bias 正向偏压、管路敷设技术通过管线不仅可以解决吊顶层配置不规范高中资料试卷问题，而且可保障各类管路习题到位。在管路敷设过程中，要加强看护关于管路高中资料试卷连接管口处理高中资料试卷弯扁度固定盒位置保护层防腐跨接地线弯曲半径标等，要求技术交底。管线敷设技术中包含线槽、管架等多项方式，为解决高中语文电气课件中管壁薄、接口不严等问题，合理利用管线敷设技术。线缆敷设原则：在分线盒处，当不同电压回路交叉时，应采用金属隔板进行隔开处理；同一线槽内强电回路须同时切断习题电源，线缆敷设完毕，要进行检查和检测处理。、电气课件中调试对全部高中资料试卷电气设备，在安装过程中以及安装结束后进行高中资料试卷调整试验；通电检查所有设备高中资料试卷相互作用与相互关系，根据生产工艺高中资料试卷要求，对电气设备进行空载与带负荷下高中资料试卷调控试验；对设备进行调整使其在正常工况下与过度工作下都可以正常工作；对于继电保护进行整核对定值，审核与校对图纸，编写复杂设备与装置高中资料试卷调试方案，编写重要设备高中资料试卷试验方案以及系统启动方案；对整套启动过程中高中资料试卷电气设备进行调试工作并且进行过关运行高中资料试卷技术指导。对于调试过程中高中资料试卷技术问题，作为调试人员，需要在事前掌握图纸资料、设备制造厂家出具高中资料试卷试验报告与相关技术资料，并且了解现场设备高中资料试卷布置情况与有关高中资料试卷电气系统接线等情况，然后根据规范与规程规定，制定设备调试高中资料试卷方案。、电气设备调试高中资料试卷技术电力保护装置调试技术，电力保护高中资料试卷配置技术是指机组在进行继电保护高中资料试卷总体配置时，需要在最大限度内来确保机组高中资料试卷安全，并且尽可能地缩小故障高中资料试卷破坏范围，或者对某些异常高中资料试卷工况进行自动处理，尤其要避免错误高中资料试卷保护装置动作，并且拒绝动作，来避免不必要高中资料试卷突然停机。因此，电力高中资料试卷保护装置调试技术，要求电力保护装置做到准确灵活。对于差动保护装置高中资料试卷调试技术是指发电机一变压器组在发生内部故障时，需要进行外部电源高中资料试卷切除从而采用高中资料试卷主要保护装置。

专业英语考试试题与答案

1.Why are cast metal sheet ingots hot-rolled first instead of being cold-rolled? Because of cold rolling is to use hot rolled steel coils as the raw material, after acid pickling to remove oxide skin for cold rolling, the finished product is hard roll, because of cold work hardening caused by deformation of continuous cold rolling hard roll strength, increase hardness, toughness and plastic index decreased, so the stamping performance will deteriorate, can only be used for simple deformation of the parts 2.What type of heat treatment is given to the rolled metal sheet after hot and “warm” rolling? What is its purpose? 轧钢的热处理的类型？轧钢热处理的目的？ Heat treatment of the main types are annealing, normalizing, quenching and tempering, solution treatment and aging treatment, cold treatment, chemical treatment, etc. Annealing： The steel is heated to a certain temperature and heat preservation for a period of time, and then make it slowly cooling, called annealing. Steel annealing is a heat the steel to the phase change or part of the phase change temperature, slow cooling after heat preservation heat treatment method. The purpose of annealing is to eliminate tissue defects, improve the organization make composition uniformity and fine grains, increase mechanical properties of the steel, reduce residual stress; Can decrease the hardness at the same time, improve the plasticity and toughness, improve machinability. So before annealing in order to eliminate and improve both the legacy of tissue defects and internal stress, and to prepare for the follow-up process, so the annealing is belong to the intermediate heat treatment, also called heat treatment in advance Normalizing： Normalizing is heated to above the critical temperature of steel, to all into homogeneous austenitic steel, heat treatment and natural cooling in air. It can eliminate hypereutectoid steel mesh cementite, for hyposteel normalizing can refine crystal lattice, improve comprehensive mechanical properties, low requirements for the parts use the normalized instead of the annealing process is more economic. Quenching: Quenching is the steel is heated to above the critical temperature, heat preservation for a period of time, then quickly into the quenching medium, the temperature plummeted, rapid cooling at greater than the critical cooling rate of speed, which is mainly composed of martensite and unbalanced heat treatment method of the organization. Can increase strength and hardness of the steel quenching, but to reduce its plasticity. That is commonly used in quenching hardening agent are: water, oil, caustic soda, and salt solution, etc

专业英语 试卷A