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  3. Federal regulators Wednesday approved a plan to create a nationwide emergence alen(警报)system using text messages delivered t0 ce

Federal regulators Wednesday approved a plan to create a nationwide emergence alen(警报)system using text messages delivered t0 ce

admin2015-07-16  20
问题 Federal regulators Wednesday approved a plan to create a nationwide emergence alen(警报)system using text messages delivered t0 cell phones．
    Text messages haVe expl。ded in popularity in recent years，particularly among young People。The wireless industry’s trade association，CTIA，estimates(估计)more than 48 billion text messages are sent each month．
    The plan comes from the Warning Alert and Response Network Act，a 2006 federal law that reqmres mprovements to the nation’emergency alert system．The act tasked the Federal Communications Commission(FCC)with coming up with new ways t0 aleI．t the public about emergencies．
    “The ability to deliver accurate and timely warnings and alerts through cell phones and other mobile services is an important next step in our efforts to help ensure that the American public has the information they need to take action to protect themselves and their families before，and during，disasters and other emergencies，”FCC Chairman Kevin Manin said following approval of the plan．
    Participation in the alert system by carriers--telecommunications companies is v01untary，but it has received solid support from the wireless industry．
  The program would be optional for cell phone users．They als0 may not be charged for receiving alerts．
  There would be three different types of messages，according t0 the rules．
  The first would be a national alert from the president，likely involving a terrorist attack or natural disaster．The second would involve“approaching threats”which could include natural disasters like hurricanes or storms or even university shootings．The third would be resen，ed for child abduction(绑架)emergencies，or so．called Amber Alerts．
  The service could be in place by 2010．
The carriers’participation in the system is determined by(    )．
选项 A、the US federal government
B、mobile phone users
C、the carriers themselves
D、the law of the United States
答案C
解析 细节理解题。由第五段“Participation in the alert system by carriers-telecommunications companies is voluntary”，特别是其中的关键词“voluntary”(自愿的，自发的)，可知手机使用者自愿决定是否参加这个新系统的实验。   
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