A.What an earthquake is like. |
B.How to predict earthquakes. |
C.Where earthquakes often happen. |
D.When a fault is formed. |
A.do research on the past frequency of large earthquakes |
B.estimate the magnitude of similar earthquakes |
C.forecast the possibilities of similar earthquakes |
D.judge the specific location of future earthquakes |
A.There were four magnitude 6 earthquakes in the San Francisco Bay region between1979 and1989. |
B.The accumulating strain of the fault to a certain level results in the earthquake. |
C.About 68 years after 1911, no earthquakes occurred in the San Francisco Bay region. |
D.The fast increasing population on the earth is the main cause of the earthquake. |
A.The material of rocks. |
B.The existing time span of the rocks. |
C.The plate movements around the rocks. |
D.The amount of strain released in the last earthquake. |
A.has a greater understanding of the causes and effects of earthquakes |
B.stores much more information about the history of large earthquakes |
C.offers the potential for doing research on the faults where strain accumulates |
D.illustrates specifically how rocks along a fault are formed |
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