7．While the history of technology can be traced along many lines，one of the most amazing development is that of photo technology，the technology of light．From the prehistoric invention of fire to laser beams （激光束） and fiber optics （光纖），light has"continually occupied the minds of inventors"．Their inventions fall into two groups：the use of light to help us see better and more interestingly，the use of light for purposes of communication．
The use of light for communicating is one of the major directions that technology has taken ever since the middle of the nineteenth century．From still photography to motion pictures to television （with a development from black-and-white to color imagery in each），photo technology has had a great effect upon mass communication and mass education．Unlike the printed words，visual images have more impact because they are more immediate．They copy reality in a way that the printed words cannot．Unlike letter shapes，they are not abstract； unlike words，they require no symbolic interpretation by the mind．Combined with the widespread and uniform spreading of such images，photo technology affects the thinking of vast audiences and shapes their view of reality．
Millions of Americans are affected by the commercially-inspired electronic manipulation （操作） of artificial images．We call it"entertainment"and can't wait to get more．
As the number of commercially available television channels grows，the viewer's freedom of choice increases，but so does the burden of that choice．Increasingly he is faced with a sea of in formation and is asked to make quick choices．
More significantly，the ease and rapidity of mass communication has created a supply of information greater than it can readily be absorbed．Flooded in the sea of information，the individual struggles to swim through it．
67．Prom the first paragraph1we can learn about the Technology of light thatD．
A．its practical use is only to enable people to see welt arid clearly
B．it achieved an amazing development in the early nineteenth century
C．its development is related to the study of the history of technology
D．it has aroused the interest of inventors ever since ancient times
68．Why do visual images differ from the printed words？Because theyD．
A．have much deeper meanings
B．enable the viewer to use his imagination fully
C．fail to produce a beneficial effect upon youngsters
D．have a greater immediate influence upon the viewer
69．According to the passage we can know thatA with the development of photo technology．
A．more and more television channels are opened
B．it takes less time for a new idea to be absorbed
C．the number of film goers has become greater
D．fewer and fewer people seem to prefer TV programs
70．The passage is mainly aboutC．
A．the history of technology
B．the speed of mass communication
C．the influence of light on communication
D．the great number of television channels．
分析 文章主要講從遠古時期開始，人們就對光充滿了興趣，隨著社會的發(fā)展，光的運用可以促進人們的交流．
解答 67-70DDAC
67：D 由第一段第二句"From the prehistoric invention of fire to laser beams and fiber optics，light has'continually occupied the minds of inventors'．"可知，從遠古時期開始，人們就對光充滿了興趣，故正確答案為D．
68：D 細節(jié)題．由第二段第三句"Unlike the printed words，visual images have more impact because they are more immediate．"可知，比起 printed words，visual images 的影響更大，故正確答案為D．
69：A 由文章倒數(shù)第二三段內(nèi)容可知，成千上萬的美國人被電子操作人工圖象所帶來的商機激勵，產(chǎn)生了更多的電視頻道，于是人們的選擇更多了，因此A項正確，故正確答案為A．
70：C 主旨題．文章主要講光的運用促進人們的交流，C項"光對溝通方式的影響"符合文意，故正確答案為C．
點評 1、要想做好科普英語閱讀理解題，同學們就要注意平時多讀科普知識類文章，學習科普知識，積累常見的科普詞匯，從根本上提高科普英語的閱讀能力．
2、要熟悉科普類文章的結(jié)構(gòu)特點．科普類文章一般由標題（Head line），導(dǎo)語（Introduction），背景（Back ground），主體（Main body）和結(jié)尾（End）五部分構(gòu)成．標題是文章中心思想高度而又精辟的概括，但根據(jù)歷年的高考情況來看，這類閱讀理解材料一般不給標題，而要同學們選擇標題．導(dǎo)語一般位于整篇文章的首段．背景交待一個事實的起因．主體則對導(dǎo)語概括的事實進行詳細敘述，這一部分命題往往最多，因此，閱讀時，同學們要把這部分作為重點．結(jié)尾往往也是中心思想的概括，并與導(dǎo)語相呼應(yīng)，命題者常在此要設(shè)計一道推理判斷題．
3、在進行推理判斷時，同學們一定要以閱讀材料所提供的科學事實為依據(jù)，同時所得出的結(jié)論還應(yīng)符合基本的科普常識．
