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Most earthquakes occur within the upper 15 miles of the earth’s surface. But earthquakes can and do occur【C1】______all depths to
Most earthquakes occur within the upper 15 miles of the earth’s surface. But earthquakes can and do occur【C1】______all depths to
admin
2013-02-05
22
问题
Most earthquakes occur within the upper 15 miles of the earth’s surface. But earthquakes can and do occur【C1】______all depths to about 460 miles. Their number【C2】______as the depth increases. At about 460 miles one earthquake occurs only every few years. Near the surface earthquakes may run as【C3】______as 100 in a month, but the yearly average does not【C4】______much.
The【C5】______of the disaster in an earthquake depends on many【C6】______. If you carefully build a toy house with an erect set, it will still stand no matter【C7】______you shake the table. But if you build a toy house with a【C8】______of cards, a slight shake of the table will make it fall. An earthquake in Agadir, Morocco, was not strong enough to【C9】______on distant instruments, but it completely destroyed the city. Many stronger earthquakes have done comparatively【C10】______damage. If a building is well【C11】______and built on solid ground, it will【C12】______an earthquake. Most【C13】______in earthquakes have been【C14】______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【C15】______.
The United Nations【C16】______an important part in【C17】______the damage done by earthquakes. It has sent a team of experts to all countries known to be【C18】______by earthquakes. Working with local geologists and engineers, the experts have studied the【C19】______of the ground and the type of most practical building code for the local area. If【C20】______, these suggestions will make disastrous earthquakes almost a thing of the past.
【C2】
选项
A、increases
B、decreases
C、rises
D、lessens
答案
B
解析
上下文题及词义辨析题 根据下文“地底460英里处几年才发生一次地震,而接近地表处一个月可能就发生100次”,可见越深入地底,地震次数越少。而lessen的意思是减轻,比如说减轻痛苦,减轻疼痛,减轻影响;decrease的意思是量上的减少。故选B。
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0
专业英语四级
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