单项选择题

One of the causes of earthquake might be that ______.

A．it occurs in the center of the earth, so experts cannot tell when earthquakes will occur
B．there is rushing water in the center of the earth
C．solid rocks under the ground move and strain against each other, causing the earth's surface moving
D．there are other unknown causes

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热门试题

单项选择题

We can infer from the passage that ______.

A．a great mass of solid rock suddenly moves deep inside the earth
B．earthquake usually does great damage to human beings
C．earthquake cannot be measured
D．earthquake takes place with a loud roar

单项选择题

It can be concluded from the passage that ______.

A．earthquakes no longer happen any more since many cities are taking steps to prevent loss of life in earthquakes
B．more sensitive machines are used to measure the strength of earthquakes
C．people can save themselves when earthquake happens
D．earthquakes do less damage to human beings became many cities are taking steps to prevent loss of life in earthquakes