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Most earthquakes occur within the upper 15 miles of the earth’s surface, but earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 miles one earthquake occurs only every few years. Near the surface earthquakes may run as high as 100 in a month, but the yearly average does not vary much.
The extent of the disaster in an earthquake depends on many factors. If you carefully build a toy house with an erect set (堅立架), it will still stand no matter how much you shake the table. But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir was not strong, but it completely destroyed the city. Many stronger earthquakes have done comparatively little damage. If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic. When people rush out into narrow streets, more deaths will result.
There is one type of earthquake disaster that little can be done about. This is the disaster caused by seismic (地震的) sea waves, or tsunamis (海嘯). These are often called tidal waves, but the name is incorrect. They had nothing to do with tides. In certain areas, earthquakes take place beneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. The waves are not noticeable out at sea because of their long wave length. But when they roll into harbors, they pile up into walls of water 6 to 60 feet high. The Japanese call them “tsunamis” meaning “harbor waves”, because they reach a sizable (相當大的) height only in harbors.
Tsunamis travel fairly slowly, at speeds up to 500 miles an hour. An earthquake warning system is in use to warn all shores likely to be reached by the waves. But this only enables people to leave the threatened shores for higher ground: There is no way to stop the oncoming wave.
【小題1】Which of the following can NOT be concluded from the passage?

A.The number of earthquakes is closely related to the depth.
B.Roughly the same number of earthquakes occur each year.
C.Earthquakes are impossible at depths over 460 miles.
D.Earthquakes are most likely to occur near the surface.
【小題2】The destruction of Agadir is an example of       .
A.faulty building construction
B.an earthquake’s strength
C.widespread panic in earthquakes
D.ineffective instruments
【小題3】According to the passage, the waves caused by submarine earthquakes are not noticeable out at sea because of       .
A.their high speed
B.the wide shores
C.their silent movements
D.their long wave length
【小題4】The significance of the slow speed of tsunamis is that people may      .
A.help reduce fear
B.find ways to stop them
C.be warned early enough
D.develop warning systems
【小題5】According to the passage, the number of factors that may determine the extent of the disaster in an earthquake is      .
A.two B.fiveC.four D.three


【小題1】C
【小題2】A
【小題3】D
【小題4】C
【小題5】D

解析試題分析:本文介紹了地震的危害以及影響地震危害的3個因素,最后提及了地震和海嘯之間的關系。
【小題1】C 細節題。根據第一段1,2行Most earthquakes occur within the upper 15 miles of the earth’s surface, but earthquakes can and do occur at all depths to about 460 miles.說明C項的說法是錯誤的,故C項符合要求。
【小題2】A 推理題。根據第二段But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir was not strong, but it completely destroyed the city.說明如果建筑不夠堅固,最輕微的搖晃也能導致很大的傷害。接著就舉例說明了,那么在Agadir這里的建筑應該屬于不夠牢固的建筑,故A正確。
【小題3】D 細節題。根據第三段第五行The waves are not noticeable out at sea because of their long wave length.說明D項正確。
【小題4】C 推理題。根據最后一段1,2行Tsunamis travel fairly slowly, at speeds up to 500 miles an hour. An earthquake warning system is in use to warn all shores likely to be reached by the waves.說明這樣的海嘯是可以被預測警告的,故C項正確。
【小題5】D 細節題。根據第二段6,7,8這3行內容If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic.說明有3個因素,故D正確。
考點:考查科普類短文閱讀
點評:本文屬于科普類短文,此類文章的最大的障礙是詞匯以及考生對閱讀內容的不熟悉,需要考生在閱讀的時候有足夠的耐心。要養成在上下文串聯中猜測詞義的能力,根據上下文中出現的同義詞,近義詞,反義詞,以及詞義的解釋來理解生詞。同時要抓住文章的中心,不要受其他信息的影響。要根據題目及選項以及文章的上下文串聯合理的判斷推理。

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