【简答题】A.He thought the noise was caused by the flu. B.He promptly realized an earthquake happened. C.He went downstairs and screamed. D.He went back to his bedroom to sleep.
【单选题】Which of the following is true according to the passage?
A.
Although the nature of earthquakes and earthquake belts are understood by most people, there is still not a widespread awareness of earthquake hazards.
B.
It will probably be many years before we can predict earthquakes accurately and the control of earthquakes is even farther away.
C.
Scientists are looking very closely at the most active fault system in the United States, such as the Rocky Mountain Arsenal earthquakes.
D.
Experimentation has shown that the earthquake activity has no connection with the fluid injection.