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he eye.They occur in tropical regions.Over its lifetime,one of these can release as much energy as 10,000 nuclear bombs.
　　The seed for hurricane formation is a cluster(聚集)of thunderstoms over warm tropical waters.Hurricanes can only form and be fed when the sea-surface temperature exceeds 27℃ and the surrounding atmosphere is calm.These requirements are met between June and November in the northern part of the world.
　　Under these conditions,large quantities of water evaporate(蒸发)and condense(冷凝)into clouds and rain-releasing heat in the process.It is this heat energy,combined with the rotation of the Earth,that drives a hurricane.
　　When the warm column of air from the sea surface first begins to rise,it causes an area of low pressure.This in turn creates wind as air is drawn into the area.This spinning wind drags up more moist air from the sea surface in a process that strengthens the storm.Cold air falls back to the ocean surface through the eye and on the outside of the storm.
　　Initially,when wind speeds reach 23 miles per hour,these mild,wet and grey weather systems are known as depressions,or low air pressure.Hurricane Katrina formed in this way over the south-eastern Bahamas on 23 August 2005.Katrina has had a devastating impact on the Gulf Coast of the US,leaving a disaster zone of 90,000 square miles in its wake(尾迹)-almost the size of the UK.Thousands have been killed or injured and more than half a million people have become homeless in a humanitarian(人道主义的)crisis of a scale not seen in the US since the Great Depression.The cost of the damage may top $100 billion.
　　36.The eye of a hurricane refers to its
　　A.lower part.
　　B.rotating part.
　　C.calm central part.
　　D.most violent part.
　　37.Which of the following is NOT a “requirement”for the formation of a hurricane?
　　A.Calm surrounding atmosphere.
　　B.High air pressure.
　　C.Warm sea-surface temperature.
　　D.A group of thunderstorms over warm tropical waters.
　　38.When the warm air from the sea surface begins to rise,it
　　A.creates an area of low pressure.
　　B.supplies cold air to the eye of a hurricane.
　　C.increases the sea-surface temperature.
　　D.strengthens the rotation of the earth.
　　39.The word“impact”(paragragh 5)could be best replaced by
　　A.“function”.
　　B.“pressure”.
　　C.“disaster”.
　　D.“effect”.
　　40.Which of the following is NOT true of Hurricane Katrina according to the last paragraph?
　　A.The area affected is almost as big as the UK.
　　B.It has left a disaster zone of 90,000 square miles.
　　C.Over half a million people have been forced to leave their homes.
　　D.This crisis is more serious than that of the Great Depression.
　　第三篇Trying to Find a Parther
　　One of the most striking findings of a recent poll in the UK is that of the people inbterviewed,one in two believes that it is becoming more difficult to meet someone to start a family with.
　　Why are many finding it increasingly difficult to start and sustain intimate relationships?Does modern life really make it harder to fall in love?Or are we making it harder for ourselves?
　　It is certainly the case today that contemporary couples benefit in different ways from relationships.Women no longer rely upon partners for economic security or status.A man doesn’t expect his spouse to be in sole charge of running his household and raising his children.
　　But perhaps the knowledge