9．Don't be surprised if you see a group of people dancing or shouting on the square．They are a flash mob．Confused by their name？Actually，a flash mob，organized with the help of the Internet or other digital communications networks，is a group of people who gather suddenly in a public place，do something unusual for a period of time，such as exchanging books，coming together to look at the sky，waving their hands and shouting something at the top of their lungs for 30seconds，and then quickly disappear before the police can arrive．
Bill Wasik，senior editor of Harper's Magazine，organized the first flash mob in Manhattan in May 2003and the first successful flash mob gathered on June 3，2003at Macy's department store involving 100people gathering on Macy's Department Store．Following this，about 200people flooded the lobby of the Hyatt hotel，applauding in one voice for fifteen seconds，and next participants pretending to be tourists on a trip invaded a shoe shop in Soho．A later mob saw hundreds of people in Central Park making bird noises．
Wasik claimed that he created flash mobs as a social experiment designed to make fun of hipsters （赶时髦的人），and call attention to the cultural atmosphere．
Many web logs，chat rooms and Web groups are devoted to the craze．Though flash mobs were originally regarded as useless，the concept has already developed for the benefit of political and social events．Flash mobbing takes advantage of the efficiency of communicating information on Websites and by email，and protesters can similarly use the"on and off"concept to be involved in political events．Such flash mob gatherings can sometimes shock or frighten people who are not aware of what is taking place．They also have enormous economic potential，such as using flash mobs to advertise a product．
The flash mob is now becoming more and more popular．People use it to do many things．For example，in 2009，hundreds of Michael Jackson's fans took part in a flash mob to remember him，gathering outside the railway station in Liverpool，singing and dancing Michael's famous song Beat It together．In another example，some people took part in a flash mob to warn people against negative words．Flash mobs give people from all walks of life an opportunity to come together to create a memory．
28．The writer indicates that the flash mobA．
A．may perform some positive functions
B．is always a headache for the police
C．is now a social experiment to criticize fashion followers
D．helps to improve the efficiency of communication
29．A flash mob is most likely toB．
A．give out leaflets of a brand bicycle to the passers-by
B．gather in public places performing and leave quickly
C．plan to go mountaineering on the first day of Horse Year
D．sit for days in front of the city hall for higher wages
30．According to the passage，what contribute（s） most to the popularity of the flash mob？
D
A．Harper's Magazine
B．the government
C．political events
D．digital networks
31．The purpose of the writing isC．
A．to amuse and interest
B．to argue and advise
C．to describe and introduce
D．to question and comment．
分析 如果你在街上或者火车站看到一群人唱歌跳舞，你不必惊讶，这是快闪族在活动．快闪族是一群在公共场所突然聚集在一起的人群，做一些不同寻常的事情，然后快速解散．在本文中作者对快闪族进行了一些介绍．
解答 28．A，细节理解题，根据句子the concept has already developed for the benefit of political and social events可知，作者认为快闪族可能有一些积极的功能，故答案为A．
29．B，细节理解题，根据第一段的a flash mob，organized with the help of the Internet or other digital communications networks，is a group of people who gather suddenly in a public place，do something unusual for a period of time，such as exchanging books，coming together to look at the sky，waving their hands and shouting something at the top of their lungs for 30seconds，and then quickly disappear 可知，快闪族最有可能在公众场合集合，做一些不同寻常的事情，然后迅速消失，故答案为B．
30．D，细节理解题，根据文章第三段Many web logs，chat rooms and Web groups are devoted to the craze可知，数字网络最有助于快闪族的流行，故答案为D．
31．C，推理判断题，随着网络的快速发展，出现了一种新型人类：快闪族．本文主要介绍了快闪族的形成及发展，故答案为C．
点评 解答任务型阅读理解题，首先对原文材料迅速浏览，掌握全文的主旨大意．因为阅读理解题一般没有标题，所以，速读全文，抓住中心主旨很有必要，在速读的过程中，应尽可能多地捕获信息材料．其次，细读题材，各个击破．掌握全文的大意之后，细细阅读每篇材料后的问题，弄清每题要求后，带着问题，再回到原文中去寻找、捕获有关信息．最后，要善于抓住每段的主题句，阅读时，要有较强的针对性．对于捕获到的信息，要做认真分析，仔细推敲，理解透彻，只有这样，针对题目要求，才能做到稳、准．
