课时分层作业（六）.docx

课时分层作业（六）.docx课时分层作业（六）
I .阅读理解
A
The US government has recently helped people learn more about the dangers of earthquakes by publi.
【语篇解读】本文是一篇说明文。为了提高人们对地震的防范意识，美国 政府加大了在防震、预测方面的投入，他们甚至在努力采取措施控制地震的发生。
Earthquakes belts are.
maps that show where earthquakes are likely to occur
B ・ zones with a high probability of earthquakes
C ・ breaks between two sections of the earth's surface
D. the two layers of earth along a fault
B ［细节理解题。根据第一段的第三句可知，地震多发地带被称为earthquake belts o ］
2 ・ The San Andreas fault is・
A. an active fault system
B ・ a place where earthquakes have been predicted correctly
C ・ a place where earthquakes have been controlled
D ・ at the foot of the Rocky Mountain
A ［细节理解题。根据第二段可知，该地区为地震比较活跃的地区。］
What did scientists learn about earthquakes at the Rocky Mountain Arsenal?
They occur at about 4, 000 metres below ground level.
The injection of water into earthquake faults prevents earthquakes from occurring.
C ・ They are usually caused by the oil in the faults.
D. Harmful earthquakes could be prevented by causing harmless earthquakes.
D ［细节理解题。根据最后一段尾句可知选D。］
What can be said about the experiments at the Rocky Mountain Arsenal?
They have no practical value in earthquake prevention.
They may have practical value in earthquake prevention.
C ・ They are certain to have practical value in earthquake prevention.
D. Nothing is told about their practical value in earthqu