2．Which of the following can benefit from the new system most?

　　A．Areas far away from the center of the earthquake.

　　B．Areas directly above the center of the earthquake.

　　C．The Los Angeles area.

　　D．High­speed bullet trains.

　　答案　A　[推理判断题。由倒数第二段第二句知，距离震中越近的地区would have the least warning，故离震中愈远，受益愈大。]

　　3．From what Professor Allen notes in the last paragraph we can infer that________.

　　A．it's very important for people to become educated

　　B．it's very important to warn people before an earthquake starts

　　C．it's very important for people to know about earthquakes

　　D．it's very important for people to know about the new system

　　答案　D　[由全文最后一句可知选D。]

　　4．What do we learn from the passage?

　　A．People could cut off electric power or gas immediately after the new system gives a warning.

　　B．A low­energy wave may move slowly and cause little damage.

　　C．Japan has a warning system based on S­waves to slow down bullet trains.

　　D．The new system has been employed in warning of major earthquakes all over the United States.

　　答案　A　[细节理解题。答案见文中第二段第三句。]

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