c. It provides users with smart phone

　　d. It allows users to enrich its material

　　e. It gives non-stop physical and digital services

　　A. a, b, d

　　B. a, c ,e

　　C. b, c, d

　　D. b, d, e

　　52.This ext more from

　　.

　　A. a put book

　　B. a library guide

　　C. a handbook

　　D. newspaper report

　　15.（2011·福建卷）E

　　The

　　internet will open up new vistas (前景),create the global village- -you can make new friends all around the world. That,at least, is what it promised us. The difficulty is that

　　It did not take the human mind into account. The reality is that we cannot keep relationship than a limited number of people. No matter how hard the internet tries to put

　　You in communication, its best efforts will be defeated by your mind.

　　The problem is twofold（双重的）. First, there is a limit on the number of people we can hole in mind and have a meaningful relationship with. That number is about 150 and is set by the size of our brain. Second, the quality of your relationships depends on the amount of time you invest （投入） in then. We invest a lot in a small number of people and then distribute what’s left among as many others as we can. The problem is that if we invest little time in a person, our engagement with that person will decline （减弱）until eventually it dies into “someone I once knew”.

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