参考答案：B

解析：[听力原文]Email captures the essence of life at the close of the 20th century with an authority that few other products of digital technology can claim. Email, ultimately, is a fragile thing, easy to forge, easy to corrupt, easy to destroy. A few weeks ago, a co-worker of mine accidentally and irretrievably wiped out 1,500 of his own saved messages. For a person who conducts most of his life online, such a digital tragedy is akin to erasing part of his own memory. Suddenly, nothing is left. He has lost himself as well as his links with others.

[分析]： 语义的理解和判断题。 关于email，原文认为在20世纪末期Email captures the essence of life... with an authority that few other products of digital technology can claim. Email，ultimately, is a fragile thing...即email捕捉到了生活的本质，其权威性是其它数字技术的产品无法比拟的。但是， email终究是脆弱的。由此可知，B项内容与原文相符，为正确答案。[解题关键] 能够将本段主要内容简单的总结归纳。