Federal regulators Wednesday approved a plan to create a nationwide emergency alert（警报）system using text messages delivered to cell phones.
Text messages have exploded 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 es from the Warning Alert and Response Network Act，a 2006 federal law that requires improvement to the nation's emergency alert system.The act tasked the Federal Communications Commission (FCC) with ing up with new ways to alert 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 Martin said following approval of the plan.
Participation in the alert system by carriers—telemunications panies is voluntary, but it has received solid support from the wireless industry.
The program would be optional for cell phone users. They also may not be charged for receiving alerts.
There would be three different types of messages，according to 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 reserved for child abduction（绑架）emergencies,or so-called Amber Alerts.
The service could be in place by 2010.
【小题1】 What is the purpose of the approved plan?A．To warn people of emergencies via messages. B．To popularize the use of cell phones. C．To estimate the monthly number of messages. D．To promote the wireless industry.【小题2】 The improvement to the present system is in the charge of .A．CTIAB．the Warning Alert and Response NetworkC．FCC D．federal regulators【小题3】 The carriers' participation in the system is determined by .A．the US federal governmentB．mobile phone usersC．the carriers themselves D．the law of the United States【小题4】. Which of the following is true of cell phone users?A．They must accept the alert service.B．They may enjoy the alert service for free. C．They must send the alerts to othersD．They may choose the types of messages【小题5】. Which of the following would be the best title for the text?
A，Cell Phone Alerts Protecting Students
B. Cell Phone Alerts by Wireless Industry
C. Cell Phone Alefts of National Disasters
D. Cell Phone Alerts Coming SoonA
网友回答
(答案→)A
解析：
【小题1】A 事实细节题，根据第一段的Wednesday approved a plan to create a nationwide emergency alert（警报）system using text messages delivered to cell phones可知，目的是使用短信来向人们发出警报
【小题2】.C 事实细节题，根据第三段.The act tasked the Federal Communications Commission (FCC) with ing up with new ways to alert the public about emergencies可知
【小题3】C 事实细节题，根据第五段的 Participation in the alert system by carriers—telemunications panies is voluntary可知，参与是自愿的，因此由他们自己决定
【小题4】B 事实细节题，根据第六段的 They also may not be charged for receiving alerts可知，可能是免费的
【小题5】.D 主旨大意题，根据中心段落第一段可知，文章主要讲述的是一项通过手机短信来通知人们紧急情况的方案即将出台。