国家电网公司专业技术人员电力英语水平考试宝典(补全短文)补全短文Passage 1 Functions of power transmission CEADBThe function of (1) is to send power from power plants to load center or to exchange。
A. step-down substations and connected transmission equipmentB. power network operationC. power transmissionD. transmission at high voltageE. power networksPassage 2 Substation misoperation and its preventing CEABDThe misopemtion that can lead to (1) mainly are：①on-load switching of isolating switch；A. preventing the misoperation in substationB. the closing of grounding switch with power onC. accidents in the electrical operation of the substationD. the persons from illegal entering the lived bayE. the grounding wire (closing the grounding switch) with power onPassage 3 A brief introduction on the development of supercritical boilers and their main advantages BDEACIn (1) such as U.S.A，Japan and European countries，the supercritical。
A. good homogenization of distributionB. some advanced countriesC. whole process management is strengthenedD. great advantages oil economy and environmental protectionE. subcritical once-through boilerPassage 4 Steam generation and use BEADCSteam is one of man’s dependable servants More and more in the background，。
A. first generating steamB. an electrically heated homeC. use of steam for electric power generationD. the new generating capacity being installedE. the fuel is uranium and the heat is suppliedPassage 5 Circuit breaker BDAECCircuit breakers are automatically operated high voltage (or high current) switches.。
A· to perform any switching operation after long periodsB. to control electrical power networksC. of the circuit breakerD. to switch the current which can be from a few amperesE. of the highest importance for high reliabilityPassage 6 The ratio of distance to height of pumped-storage power plant BDACEFor pumped-storage power plant, generally the ratio of distance to height(l), 。
A. is most economicB. is used to evaluate topographic condition of power plantC. is not desirableD. is the ratio of horizontal distance between upper and low reservoirE. is the bestPassage 7 Fuel cells BAECDFuel cells are devices that when a fuel such as hydrogen or hydrogen-rich compounds and oxygen are supplied to 。
A . further development is under wayB. there is no storage capacity in a fuel cellC. many cells are operated in series to obtain voltagesD. supply alternating current from fuel cellsE. as they are being developed there have been some applicationsPassage 8 Substations pace into the Digital Age CAEBDSubstations constitute the main part of power transmission and distribution in a power grid. 。
A. substation automation technology has reached a certain levelB. simulation training technology for substation operationC. composed of a large number of primary and secondary equipmentsD. a full-digital automation systemE. all of which has become an indisputable factPassage 9 Overcoming the Problem of Waste CADEBMany large cities are anything but beautiful Streets are littered with trash. In this trash, however, (1) 。
A. there is no time to be lostB. building beautiful cities out of garbage is only a dreamC. there is still something that can be usefulD. it can be put to use againE. more and more machines are designed for this purposePassage 10 Hibernation EBDACThe weather in winter. Call be very cold. Some animals sleep during the winter, 。
A. So they don’t need to worry about bad weather and other dangerous animalsB. We call this kind of sleep in wintertime “hibernation’’C. As it gets warmer and warmer in spring，the sleeping animals begin to wake up and look around for foodD. Hibernating animals don’t need to eat much because they don’t moveE. They can sleep for a long timePassage 11 Satellites BDACEThe body that is neatest to the Earth is the moon. (1). This satellite is 。
A. The bigger and heavier a body is, the greater is its force of gravityB. It circles the Earth and is therefore know as a satellite of the EarthC. To get out into space we have to overcome the Earth’s gravitational pullD. A satellite stays in orbit because the planet gravitational force keeps pulling it into a circleE. Artificial satellite can be used for various purposesPassage 12 Secondary equipment in power system BDEACThe secondary equipments in power system are (1), measuring，regulating，。
A. 5A rated current of the current transformer secondary windingB. the equipments that provide protecting，monitoringC. 50V rated voltage of PT secondary sideD. the equipments that send the command signalsE. current values in secondary systemPassage 13 Switching overvoltage EABCDA sudden change in the configuration of transmission network caused (1) or by the appearance of a fault can。