单项选择题

This passage implies that ______.

A．horizontal faults are more dangerous than vertical faults
B．vertical faults are more dangerous than horizontal faults
C．earthquakes may occur around fault areas
D．California will break into pieces by an eventual earthquake

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单项选择题

This passage is mainly about ______.

A．the New Madrid fault in Missouri
B．the San Andreas and the New Madrid faults
C．the causes of faults
D．current scientific knowledge about faults

单项选择题

We may conclude from the passage that ______.

A．it is probably as dangerous to live in Missouri as in California
B．the New Madrid fault will eventually develop a mountain range in Missouri
C．California will become an island in future
D．a big earthquake will occur to California soon