[解析]
(1)推理判断题。根据第一段Libraries know they need digital wares if they are to remain relevant,but many publishers are too cautious about piracy (盗版) and lost sales to cooperate.(图书馆知道,如果他们想保持影响力,就需要数字产品,但许多出版商对盗版和销售损失过于谨慎,不愿合作。)可推知,许多出版商对电子书授权犹豫不决。故选A。
(2)细节理解题。根据第二段中Unlike printed books,e﹣book files can be downloaded at home from digital libraries anytime.The files disappear from the device when they are due automatically.Awkwardly for publishers,buying an e﹣book costs more than renting one but offers little extra value.(与纸质书不同,电子书文件可以随时在家里从数字图书馆下载。当文件到期时自动从设备中消失。令出版商尴尬的是,购买一本电子书比租用一本要贵,但却没有什么额外的价值。)可知,出版商担心电子借阅因为利润可能会明显下降。故选A。
(3)细节理解题。根据倒数第二段Late last year Amazon introduced its Kindle Owners' Lending Library,which lets its best customers borrow free one of thousands of popular books each month.(去年晚些时候,亚马逊推出了Kindle用户借阅图书馆,让最优秀的用户每月免费借阅数千本流行图书中的一本。)可知,亚马逊正在采取措施赢得更多顾客。故选A。
(4)标题归纳题。根据第一段Like a tired marriage,the relationship between libraries and publishers has long been dull.E﹣books,however,are causing heartache.Libraries know they need digital wares if they are to remain relevant,but many publishers are too cautious about piracy (盗版) and lost sales to cooperate.(就像一段疲惫的婚姻,图书馆和出版商之间的关系长期以来一直很沉闷。然而,电子书却令人心痛。图书馆知道,如果他们想保持影响力,就需要数字产品,但许多出版商对盗版和销售损失过于谨慎,不愿合作。)结合本文由出版商和图书馆的关系入手,介绍了虽然电子借阅很方便,但大多数出版商不愿与图书馆合作,拒绝授予图书馆电子书的许可,使电子借阅经济难以预料。可知,D选项"电子书引发的紧张故事"最符合文章标题。故选D。