Anearthquakeisatremblingorshakingofthegroundcausedbythe...

問題詳情：

An earthquake is a trembling or shaking of the ground caused by the sudden release (釋放) of energy stored in the rocks below the surface. Generally, earthquakes last only seconds. strong ground shaking during a medium to large earthquake generally lasts about 10 to 30 seconds. After-shocks (餘震) can occur once in a while for weeks or even months. Many people think that there is an "earthquake season" or a kind of "earthquake weather". As a matter of fact, there isn’t. Earthquakes can occur at any time of the year and at any time of the day or night. Earthquakes occur under all weather conditions —sunny, wet, hot, or cold —without any special weather tendency (傾向). Also, you don’t need to worry about that the ground will open up and swallow people when earthquakes occur. Open ground cracks may form during an earthquake —related, for example, to land sliding or ground falling; however, such cracks tend to be open gaps (間隙) (they don’t "swallow") that a person could stand in afterwards.

   The safest place in an earthquake is in an open field, where nothing can fall on you. Earthquakes do not injure or kill people, but buildings and falling objects do. If you are indoors, when you feel the ground start to shake, take cover immediately under a table or strong piece of furniture, placing something between falling objects and yourself. Do not attempt to use the stairs or an elevator to get out of the building.

 29. The reason why there isn’t "earthquake weather" is that ______.

     A. an earthquake only lasts seconds and doesn’t happen frequently

     B. earthquakes don’t change with the seasons

     C. when an earthquake happens is related to the weather

     D. an earthquake can happen at any time and in any kind of weather

30. The underlined word "swallow" in Paragraph 3 probably means "________".

     A. make sb. frightened

     B. take sb. / sth. in

     C. make room for sb. to stand in

     D. make the ground slide

 31. During an earthquake, which of the following things should you NOT do?

     A. Find an open field and stay there.

     B. Take an elevator.

     C. Take cover under a table.

D. Stay away from buildings.

 32. The purpose of writing this passage is to ______.

     A. tell people what an earthquake is

     B. argue if there really is "earthquake weather"

     C. tell us about the earthquake and what to do when it happens

     D. give us some suggestions on what to do during an earthquake

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