专业英语-学习指南.doc

专业英语-学习指南一 根据下面的英文解释，写出相应的英文词汇。1. that is a material or covering which electricity, heat or sound cannot go through _2. that allow electricity or heat to go through _3. the standard unit of measurement for the strength of an electrical current _4. of or relating to magnetism or magnets _5. a unit of potential difference equal to one thousandth of a volt _6. a number written using the base 10; numerical _7. something, such as a machine or an engine, that produces or imparts motion _8. the act of disturbing _9. an integrated circuit that contains the entire central processing unit of a computer on a single chip _10. a procedure for solving a problem that involves collection of data, processing, and presentation of results _11. the standard measure of electrical power _12. an electric generator that produces alternating current _13. two pieces of wire were connected end to end _14. two pieces of wire were connected side by side _15. the standard unit of measurement for strength of an electrical current _16. a device used to break or open an electric circuit or to divert current from one conductor to another _17. a device that generates light, heat, or therapeutic radiation _18. a material that insulates, especially a nonconductor of sound, heat, or electricity _19. of or relating to a system of numeration having 2 as its base _20. the standard unit of electrical resistance _21. a number written using the base 10; numerical _22. something, such as a machine or an engine, that produces or imparts motion _23. the act of disturbing _24. an integrated circuit that contains the entire central processing unit of a computer on a single chip _25. a procedure for solving a problem that involves collection of data, processing, and presentation of results _26. that is a material or covering which electricity, heat or sound cannot go through _27. that allow electricity or heat to go through _28. the standard unit of measurement for the strength of an electrical current _29. of or relating to magnetism or magnets _30. a unit of potential difference equal to one thousandth of a volt _二. 根据电气工程专业基本知识，判断正误。1. PID controller is a very useful controller in industry. _2. A digital computer controlled system is only designed for discrete variable. _3. Most programmers today prefer to use high-level languages, such as C+, Java, COBOL, and Visual Basic. _4. An output device, such as a keyboard or mouse, gathers input and transforms it into a series of electronic signals for the computer. _ 5. When three capacitors connected in parallel, . _6. Electron will flow through a conductor from the positive terminal to the negative terminal. _7. For example, if the effective value is 110V, the peak value is 220V. _8. If a conductor cuts through lines of flux, the voltage in the conductor is caused. _9. Whenever a conductor cuts through lines of flux a voltage is induced in the conductor. The voltage is CEMF (Counter Electromotive Force). _10. In China alternating current is usually generated at 60Hz. _11. In alternating current an AC generator is used to make electrons flow continuously in one direction. _12. In North American 50Hz is adopted as standard frequency in electric power system. _13. A computers microprocessor only understands high-level language. _14. Instructions written in a high-level language must be translated into machine language in binary form before a computer can use them. _15. In alternating current an AC generator is used to make electrons flow continuously in one direction. _16. In China alternating current is usually generated at 60Hz. _17. The north pole of the armature is attracted to the south pole of the main field. The south pole of the armature is attracted to the north pole of the main field. _18. When three capacitors connected in series, . _19. The commutator can change current direction in the conductor. _20. Most computers are equipped with a keyboard as the primary output device. _21. Electron will flow through a conductor from the positive terminal to the negative terminal. _22. For example, if the effective value is 110V, the peak value is 220V. _23. If a conductor cuts through lines of flux, the voltage in the conductor is caused. _24. Whenever a conductor cuts through lines of flux a voltage is induced in the conductor. The voltage is CEMF (Counter Electromotive Force). _25. PID controller is a very useful controller in industry. _26. A digital computer controlled system is only designed for discrete variable. _27. Most programmers today prefer to use high-level languages, such as C+, Java, COBOL, and Visual Basic. _28. An output device, such as a keyboard or mouse, gathers input and transforms it into a series of electronic signals for the computer. _ 29. When three capacitors connected in parallel, . _30. In China alternating current is usually generated at 60Hz. _三. 基本词汇的英汉互译。1. 电能转换器 _2. _ load resistance3. 理想电压源 _ 4. _ internal resistance5. 转子 _6. _ semiconductor7. 运算放大器 _8. _ distributed winding9. 同步发电机 _ 10. _ reactive power compensation11. _ rated armature current 12. 理想电源 _ 13. _ circuit parameters14. 周期电流 _ 15. _ negative feedback16. 直轴 _ 17. 有功电流分量 _ 18. _ reactive current current19. 电网 _ 20. _ digital relays 21. 运算放大器 _22. _ distributed winding23. 同步发电机 _ 24. _ reactive power compensation 25. 电能转换器 _26. _ load resistance27. 理想电压源 _ 28. _ internal resistance29. 转子 _30. _ semiconductor四. 根据电气工程基本知识，完成填空。1. Resistors are _ elements. A. passive B. active C. independent sources D. dependent sources2. An electric heater draws 10 A from a 120V line. The resistance of the heater is _. A. 1200 B. 120 C. 12 D. 1.23. The algebraic sum of all voltages around a loop is _. A. zero B. indefinite value C. sum of voltage rises D. sum of voltage drops4. ON-OFF information can be represented by _ signal. A. a digital B. an analog C. a discrete D. a control5. The process quantizing the continuous values into a binary scale is called _. A. digital-to-analog conversion B. digital-to-digital conversion C. analog-to-digital conversion D. analog-to-analog conversion6. The wide application of operational amplifiers lies in advantage of using _. A. positive feedback networks B. large open-circuit gain C. negative feedback networks D. small output impedance7. When an induction motor with 10 poles is supplied by 50Hz three-phase ac power source, the synchronous revolutions per minute is _. (Synchronous r/min = 120 f/p) A. 1000 B. 900 C. 700 D. 6008. The electric machine that operates at speeds above synchronous speed works in _ region. A. motoring B. generating C. plugging D. stopping9. A transformer is a device that can convert one ac voltage to another ac voltage through the action of _. A. an electric circuit B. a magnetic field C. an electric field D. a coupling circuit10. The primary winding is connected to _. A. the power source B. the load C. the measurement instrument D. the motor11. Copper losses are _ losses in the primary and secondary windings of the transformer core. A. inductive B. capacitive C. resistive D. reactive12. _ can provide an asynchronous link between two ac electric power system with different nominal frequencies. A. The HVDC (high voltage DC) transmission B. The EHV (extra-high voltage) AC transmission C. The AC distribution D. Generators13. The generator voltages are usually stepped up to the transmission voltage level by _. A. series capacitor B. parallel reactors C. step-up transformers D. step-down transformers14. The objective of the optimal economic operation of power systems is _. A. to minimize the total production cost B. to maintain frequency constant C. to maintain voltages constant D. to ensure balance between generation and load15. Any protection scheme consists basically of _. A. two elements B. three elements C. four elements D. five elements16. The protective scheme that senses zero sequence current and operates as necessary is called as _. A. overcurrent protection B. zero sequence protection C. negative sequence protection D. directional protection17. The distance protection is applied to protect _. A. transformers B. generators C. transmission lines D. buses18. The thermal energy of the steam is converted into _ energy by the turbine. A. electrical B. mechanical C. chemical D. potential19. _ is used as coolant in light-water reactors. A. Gas B. Organic compound C. Molten salt D. Water20. In the form of _ the output is continuously fed back and compared with the reference input. A. continuous control B. discontinuous control C. discrete-data control D. sampled-data control21. The overall transfer function is the ratio of the transform of the controlled variable to the transform of _. A. the controlled variable B. the reference input C. the feedback D. the output variable22. The systems characteristic equation can be used to determine _ of a linear time-invariant system. A. the stability B. magnitude of the steady-state error C. the controllability D. the observability23. In the root-locus method the actual time response of a system can be obtained by means of _. A. the inverse Fourier transform B. the inverse Laplace transform C. the Fourier transform D. the Laplace transform24. The Buck（降压式变换器） is a _ converter. A. voltage step-up B. current step-down C. current step-up D. resistance 25. Most desktop computers use a separate _ as a display device, where notebook computers use a flat panel LCD screen (liquid crystal display screen) that attached to the system unit. A. keyboard B. Mouse C. Monitor D. hard disk 26. A desktop computers sound card sends signals to external _. A. printer B. speaker C. Modem D. keyboard27. Data stored in RAM _ when the power of the computer is turned off. A. is held permanently B. permanently disappears C. is held temporarily D. temporarily disappears28. The notebook computers use _ as standard display equipment. A. CRT display B. LCDs C. LED D. TV screen29. Image clarity on a computer screen is measured with _. A. screen size B. dot pitch C. resolution D. color depth30. _ that connects at least two networks makes decision about the best route for data. A. A modem B. A network card C. A hub D. A router（路由器）31. Resistors are _ elements. A. passive B. active C. independent sources D. dependent sources32. An electric heater draws 10 A from a 120V line. The resistance of the heater is _. A. 1200 B. 120 C. 12 D. 1.233. The algebraic sum of all voltages around a loop is _. A. zero B. indefinite value C. sum of voltage rises D. sum of voltage drops34. ON-OFF information can be represented by _ signal. A. a digital B. an analog C. a discrete D. a control35. In North American _ is adopted as standard frequency in electric power system. A. 25Hz B. 50Hz C. 60Hz D. 125Hz 36. _ can provide an asynchronous link between two ac electric power system with different nominal frequencies. A. The HVDC (high voltage DC) transmission B. The EHV (extra-high voltage) AC transmission C. The AC distribution D. Generators37. The generator voltages are usually stepped up to the transmission voltage level by _. A. series capacitor B. parallel reactors C. step-up transformers D. step-down transformers38. A D/A is a device that can convert a digital signal to the equivalent _. A. digital form B. numerical form C. binary form D. analog form39. The precision of ADC ( analog-to-digital conversion ) is determined by _. A. its speed B. its gain C. the accuracy of the reference voltage D. the number of binary bits40. When an induction motor with 10 poles is supplied by 50Hz three-phase ac power source, the synchronous revolutions per minute is _. (Synchronous r/min = 120 f/p) A. 1000 B. 900 C. 700 D. 60041. A computer printer is _ device that produces computer-generated text or graphical images on paper. A. an input B. an output C. a storage D. a data processing42. _ carries data out to speakers and headphones, or back from a microphone. A. A graphics card B. A modem C. A network card D. A sound card43. A computers microprocessor only understands _ in binary form. A. high-level languages B. machine language C. human languages D. assembly language44. Delphi belongs to _. A. low-level programming language B. high-level programming language C. a programming language connected with the computer hardware behavior D. an assembly language45. A floppy disk drive is _ device that reads data from and writes data to floppy disks. A. an input B. an output C. a storage D. a data processing46. In a coal-fired power plant, an electrostatic precipitator is used to remove _ from the combustion gases. A. solid particle B. C. CO D. water vapour47. In cogeneration（热电联产，热电联供） systems, the overall energy efficiencies are raised by _. A. important the combustion process B. providing thermal energy to the customers C. raising the steam temperature D. reducing emissions48. The hydropower is well suited for switching according to _ command to meet changing power needs. A. a consumers B. a users C. a dispatchers D. an operators49. The total transfer function for and in cascade is _. A. B. C. D. 50. The systems characteristic equation can be used to determine _ of a linear time-invariant system. A. the stability B. magnitude of the steady-state error C. the controllability D. the observability51. The Buck（降压式变换器） is a _ converter. A. voltage step-up B. current step-down C. current step-up D. resistance52. A frequency response is a function of the variable _. A. B. C. D. 53. The unit of logarithm of the magnitude of a transfer function is _. A. radians per second B. volts C. decibel D. octaves54. The DC-DC converts _ input to _ output. A. direct current, alternating current B. direct current, direct current C. alternating current, alternating current D. alternating current, alternating current55. The primary winding is connected to _. A. the power source B. the load C. the measurement instrument D. the motor56. Copper losses are _ losses in the primary and secondary windings of the transformer core. A. inductive B. capacitive C. resistive D. reactive57. The relation results in _. A. null B. identity C. indefinite value D. zero58. The notebook computers use _ as standard display equipment. A. CRT display B. LCDs C. LED D. TV screen59. An expansion slot is a long, narrow socket on the motherboard into which you can plug _. A. an expansion card B. a modem C. a network card D. a sound card C. Kirchhoffs Current D. Kirchhoffs Voltage60. The transformer is a