4、    All over the world，libraries have begun the great task of making faithful digital copies of the books and records that protect the mental efforts of mankind?. For armchair schools，the work promises to bring such a wealth of information to desktop that the present Internet may not match.

    Librarians see three clear benefits to going digital. First，it helps them preserve rare and easily broken objects without refusing the demands of those who wish to study them. The British Library, for example，holds the only medieval(middle-aged)manuscript(手稿)of Beowuif in London. Only quantified scholars were allowed to set and put the images up on the Internet for anyone to use.

    A second benefit is convenience. Once books arc changed to digital form， readers can find them in seconds rather than minutes. Several people can read the same book or view the same picture at the same time. Clerks are spared the chore (瑣事)of reserving. And libraries could use the Internet to lend their collections to those who are unable to visit in person.

    The third advantage of electronic copies is that they occupy millimeters of space on a magnetic disk(磁盤(pán))rather than meters on a shelf. The cost of library buildings is increasingly high. The University of California at Berkeley recently spent $46 million on all underground addition to house 1. 5 million books at an average cost of $30 per set of them. The price of disk storage on the contrary, has fallen to about $2 per 300-page publication and continues to drop

 

64. What is the main idea of the first paragraph?

    A. Libraries are making efforts.     

    B. More people can read precious books.

    C. The Internet provides more information.

    D. Libraries are making digital copies of books.

65. Which words in the second paragraph help you to identify the supporting points?

    A. Three，first，for example.     B. Benefim，manuscript，scholars

    C. Helps，holds，scanned          D. Clear qualified，different

66. Which of the following is mentioned in the text as a benefit of going digital?

    A. Fewer staff will be required in libraries.

    B.Libraries will be able to move underground.

    C. Borrowers need not go to the library buildings.

    D. Old manuscripts can be moved more easily.

67. How does the author develop the text?

   A. First the author gives some messages and then explain them.

   B. First the author presents his opinions and then describes them.

   C. First the author informs us of main arguments and then compares them.

   D. First the author makes an introduction and then draws a conclusion.