2017公共英語三級閱讀文章

　　對于公共英語三級，考生如果想取得比較好的成績還是需要多看多練習(xí)的。下面，就為大家送上2017公共英語三級閱讀文章三篇。

　　2017公共英語三級閱讀文章一

　　The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators.Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for millions of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.

　　All living cells send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small —— often so small that sensitive instruments are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are linked together, the effects can be astonishing.

　　The electric eel is an amazing storage battery. It can send a jolt of as much as eight hundred volts of electricity through the water in which it lives. (An electric house current is only one hundred twenty volts.) As many as four-fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to the length of its body.

　　當今時代是電氣時代。人們對電燈、收音機、電視和電話早已司空見慣以致很難想象沒有它們生活會變成什么樣。當停電時，人們在搖曳不定的燭光下暗中摸索;因沒有紅綠燈的指示，汽車在道路上遲疑不前;冰箱也停止工作，導(dǎo)致食物變質(zhì)。人們只是在兩個世紀前一點才開始了解電的使用原理，自然界卻顯然在這方面經(jīng)歷過了數(shù)百萬年�？茖W(xué)家不斷發(fā)現(xiàn)許多生物世界里可能有益于人類的關(guān)于電的有趣秘密。所有生物細胞都會發(fā)出微小的電脈沖。當心臟跳動時，把它發(fā)出的脈沖記錄下來就成了心電圖，這可讓醫(yī)生了解心臟的工作狀況。大腦也發(fā)出腦電波，這可在腦電圖上記錄下來。許多生物細胞發(fā)出的電流都是極微小的，小到要用靈敏儀器才能記錄和測量。但一些動物的某些肌肉細胞能轉(zhuǎn)化成一個個發(fā)電機，以致完全失去肌肉細胞的功能。這種細胞大量地連接在一起時產(chǎn)生的效果將是非常令人吃驚的。電鰻就是一種令人驚異的.蓄電池。它可以在水中發(fā)出相當于800伏特電壓電流(家庭用戶的電壓只有120伏特)。在電鰻的身體里，多至五分之四的細胞都專門用來發(fā)電，而且發(fā)出的電流的強度大約和它身體的長度成正比。

　　2017公共英語三級閱讀文章二

　　Television —— the most pervasive and persuasive of modern technologies, marked by rapid change and growth —— is moving into a new era, an era of extraordinary sophistication and versatility, which promises to reshape our lives and our world. It is an electronic revolution of sorts, made possible by the marriage of television and computer technologies.

　　The word "television", derived from its Greek (tele: distant) and Latin (visio: sight) roots, can literally be interpreted as sight from a distance. Very simply put, it works in this way: through a sophisticated system of electronics, television provides the capability of converting an image(focused on a special photoconductive plate within a camera) into electronic impulses, which can be sent through a wire or cable. These impulses, when fed into a receiver (television set), can then be electronically reconstituted into that same image.

　　Television is more than just an electronic system, however. It is a means of expression, as well as a vehicle for communication, and as such becomes a powerful tool for reaching other human beings.

　　The field of television can be divided into two categories determined by its means of transmission. First, there is broadcast television, which reaches the masses through broad-based airwave transmission of television signals. Second, there is nonbroadcast television, which provides for the needs of individuals or specific interest groups through controlled transmission techniques.

　　Traditionally, television has been a medium of the masses. We are most familiar with broadcast television because it has been with us for about thirty-seven years in a form similar to what exists today. During those years, it has been controlled, for the most part, by the broadcast networks, ABC, NBC, and CBS, who have been the major purveyors of news, information, and entertainment. These giants of broadcasting have actually shaped not only television but our perception of it as well. We have come to look upon the picture tube as a source of entertainment, placing our role in this dynamic medium as the passive viewer.

　　以快速變化與發(fā)展為標志的最普遍、最具有影響力的一項現(xiàn)代技術(shù)，正在步入一個極端復(fù)雜化與多樣化的新時代。這個時代承諾重新塑造我們的生活和我們的世界。這可以稱得上是又一次電子革命，其關(guān)鍵在于電視技術(shù)與計算機技術(shù)的'結(jié)合。

　　“電視”這個詞來源于希臘語詞根(tele：遠)和拉丁語詞根(vision：景象)，可以從字面上理解為來自遠處的景象。簡單說來，電視是以這種方式工作的，通過一個復(fù)雜的電子系統(tǒng)，電視能夠?qū)⒁环鶊D像(這幅圖像被聚焦在一部攝像機內(nèi)的一塊特殊的光導(dǎo)底片上)轉(zhuǎn)換成能經(jīng)過導(dǎo)線或電纜發(fā)送出去的電子脈沖信號。當這些電子脈沖信號被輸入一部接收機(電視機)時，就可以用電子學(xué)的方法把脈沖信號重新恢復(fù)成同一幅圖像。

　　但是，電視不僅僅是一個電子系統(tǒng)，它還是一種表達工具和傳播渠道。因此，電視成了一個對其他人發(fā)生影響的強大工具。

　　電視這個領(lǐng)域可以根據(jù)其發(fā)射方式分為兩類。第一類為廣播電視，通過電視信號的寬帶無線電波發(fā)射展現(xiàn)在大眾面前;第二類為非廣播電視，使用受控的發(fā)射技術(shù)來滿足個人以及某些特殊利益群體的需要。

　　電視早已成為大眾媒介。我們熟悉廣播電視，因為廣播電視已經(jīng)以類似目前的方式存在了大約37年。在那些年頭中，電視絕大部分一直由ABC、NBC、CBS這些廣播電視公司控制著，這些廣播電視公司一直是新聞、信息和娛樂的主要提供者。這些廣播業(yè)的巨頭實際上不僅塑造了電視，而且也塑造了我們對電視的理解。我們漸漸把顯像管看作是娛樂的來源，讓自己成為這個生動的媒介的被動觀眾。、NBC、CBS這些廣播電視公司控制著，這些廣播電視公司一直是新聞、信息和娛樂的主要提供者。這些廣播業(yè)的巨頭實際上不僅塑造了電視，而且也塑造了我們對電視的理解。我們漸漸把顯像管看作是娛樂的來源，讓自己成為這個生動的媒介的被動觀眾。

　　2017公共英語三級閱讀文章三

　　If by "suburb" is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization began during the emergence of the industrial city in the second quarter of the nineteenth century. Before that period the city was a small highly compact cluster in which people moved about on foot and goods were conveyed by horse and cart. But the early factories built in the 1830's and 1840's were located along waterways and near railheads at the edges of cities, and housing was needed for the thousands of people drawn by the prospect of employment. In time, the factories were surrounded by proliferating mill towns of apartments and row houses that abutted the older, main cities. As a defense against this encroachment and to enlarge their tax bases, the cities appropriated their industrial neighbors. In 1854, for example, the city of Philadelphia annexed most of Philadelphia County. Similar municipal maneuvers took place in Chicago and in New York. Indeed, most great cities of the United States achieved such status only by incorporating the communities along their borders.

　　With the acceleration of industrial growth came acute urban crowding and accompanying social stress —— conditions that began to approach disastrous proportions when, in 1888, the first commercially successful electric traction line was developed. Within a few years the horse-drawn trolleys were retired and electric streetcar networks crisscrossed and connected every major urban area, fostering a wave of suburbanization that transformed the compact industrial city into a dispersed metropolis.This first phase of mass-scale suburbanization was reinforced by the simultaneous emergence of the urban Middle Class, whose desires for homeownership in neighborhoods far from the aging inner city were satisfied by the developers of single-family housing tracts.

　　如果"郊區(qū)"指的是比已建好的城市內(nèi)部發(fā)展更為迅速的城市邊緣地帶，那么郊區(qū)化可以說始于1825 年至1850年工業(yè)化城市出現(xiàn)期間。在這之前，城市只是高度密集的小聚居群。在其中，人們步行走動，商品靠馬車來運送。但是建于18 世紀三四十年代的早期工廠位于城邊的航道和鐵路附近，被工作機會吸引到這里的成千上萬的人們需要住房。漸漸地，在與舊有的主要城區(qū)相毗鄰的地方，不斷涌現(xiàn)出由排房和公寓樓組成的工人聚居區(qū)，包圍了工廠。作為對這種侵蝕的自衛(wèi)，也為了擴大它們收稅的地域范圍，城市吞并了工業(yè)化的臨近地帶，比如1854 年費城的城區(qū)就兼并了費縣的絕大部分地區(qū)。相似的城市化也發(fā)生在芝加哥和紐約。今天很多美國的大城市其實就是靠吞并它們附近的`邊緣地區(qū)而變成大都會的。

　　隨著工業(yè)化的加速發(fā)展，城市里出現(xiàn)了嚴重擁擠和相伴而來的社會壓力。當1888 年第一條商業(yè)上成功的電氣化鐵軌被制造出來時，壓力開始接近危機的程度。幾年之內(nèi)，馬車就被廢棄了，電車網(wǎng)相互交織連接著各個重要的城區(qū)，從而形成了一種郊區(qū)化的潮流，即密集的工業(yè)城市轉(zhuǎn)變成了分散的都市。此時城市中產(chǎn)階級的出現(xiàn)進一步加強了第一波大規(guī)模郊區(qū)化。這些中產(chǎn)階級希望在遠離老舊城市的地區(qū)擁有住宅，單一家庭住宅地區(qū)的開發(fā)者滿足了他們的愿望。單一家庭住宅地區(qū)的開發(fā)者滿足了他們的愿望。

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