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11．E-book is short for electronic（電子的） book．It is usually read on personal computers．Some
mobile phones can also be used to read e-books．
Earlier e-books were written for a specific group of readers and were about only a few subjects．With the development of the internet，knowledge and answers to a lot of questions mainly come from e-books．This is why the e-book business is increasing quickly
E-books have many advantages．First，they save time．We don't need to go to a bookstore to buy books，besides，we can find the topic we want to know about on the Internet，and then we can quickly get many e-books on similar topics．Second，e-books save money．Some e-books cost a little money，and there are millions of e-books on the Internet that we can get for free．Third，more trees are saved because e-books don't need to be printed（印刷） on paper．Fourth，e-books make reading more convenient．You can carry a whole library of hundreds of books with you in a small computer or any e-book reader （電子閱讀器） without worrying about their weight．
But e-books have certain disadvantages．They need a personal computer or an e-book reader and the information can be lost if its file format （文件格式） is not supported or changed in the reader's computer．
However，e-books provide us with a new way of reading．That is good．

根據短文內容，選擇最佳答案．
51．Why is the e-book business increasing quickly？BecauseD．
A．earlier e-books are about only a few subjects．
B．people don't like to read any paper books any more．
C．most e-books have been written for a specific group of readers．
D．the development of the Internet makes e-books more useful．
52．How many advantages do e-books have according to this article？B
A．Three B．Four C．Five D．Six
53．Which of the following is true according to this article？C
A．E-books can't be red on mobile phones．
B．All the e-books on the Internet cost lots of money．
C．E-books can make reading more convenient．
D．You can't read e-books without a personal computer．
54．What is the disadvantage of the e-books？A
A．You'll lose the information if its file format is not supported．
B．You can carry hundreds of books in an e-book reader．
C．You can buy cheap e-books anywhere．
D．You can read e-books at any time．
55．The author mainly tells usA．
A．you don't need to buy paper books in a bookstore if you read e-books．
B．the information can be lost if its file format is changed．
C．the development of e-books can help save the environment．

分析【主旨大意】：本文介紹了電子書的歷史，及其優、缺點．可以說利大于弊．

解答 51-55：DBCAA
51．D 細節理解題．根據第二段的最后一句話With the development of the internet，knowledge and answers to a lot of questions mainly come from e-books．This is why the e-book business is increasing quickly．因為文中提到了互聯網的發展使電子書更有用．
52．B 細節理解題．因為第三段中First，they save time．Second，e-books save money．Third，more trees are saved because e-books don't need to be printed（印刷） on paper．Fourth，e-books make reading more convenient．提到了4點．
53．C 細節題．根據第三段Fourth，e-books make reading more convenient．可知電子書能使閱讀更便利．
54．A 細節理解題．因為第四段中的最后一句話They need a personal computer or an e-book reader and the information can be lost if its file format （文件格式） is not supported or changed in the reader's computer．他們需要一臺個人電腦或電子書閱讀器，如果讀者的電腦文件格式不被支持或改變，信息就會丟失，所以選擇A．
55．A 主旨大意題．根據第三段E-books have many advantages．First，they save time．We don't need to go to a bookstore to buy books…作者就是想告訴我們，有了電子書，可以不用再買紙質的書，故選擇A．

點評題目涉及多道細節理解題，做題時結合原文和題目有針對性找出相關語句進行仔細分析，結合選項選出正確答案．推理判斷也是要在抓住關鍵句子的基礎上合理的分析才能得出正確的答案．

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