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What is the main idea of the news item? [originaltext] The United States is i
What is the main idea of the news item? [originaltext] The United States is i
游客
2023-12-08
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问题
What is the main idea of the news item?
The United States is introducing a new public alert system that will deliver warnings to mobile phones in the event of emergency. The system is first being rolled out in New York and Washington and will operate nationwide by April.
Top mobile phone company executives joined federal officials and New York Mayor Michael Bloomberg at the World Trade Center site to announce the so-called Personal Localized Alerting Network, or PLAN. Bloomberg said the system will allow cell phones to receive free alerts about imminent safety threats.
"If people need to take action, the system will transmit instructions accurately and in a timely manner, which is something that could save countless lives," he said.
The warnings will be localized by using only local cell phone towers. The notifications could warn residents and visitors about an approaching tornado, hurricane or storm. If there is an urban terror threat, everyone in the area with a cell phone can be warned and advised what to do.
All major U.S. cell phone companies will participate in the system. The system will give priority to emergency messages, overriding all regular telephone and text traffic.
选项
A、The United States developed a computer chip for cell phones.
B、A new cell phone emergency alert system will be launched in the U.S.
C、Local cell phones towers have been built in many cities of U.S.
D、Dangerous messages could be conveyed through cell phones.
答案
B
解析
本题问及新闻的主要内容是什么。新闻指出,美国引入了一种新的公共警报系统,该系统能在紧急状态将警报发送至移动电话。并允许手机免费获取迫在眉睫的安全威胁警报。故正确答案是B。新闻的首句一般为主旨句。
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