1．It's easy to see how the sawfish got its name．These frightful creatures can grow to be more than 6 meters （nearly 20 feet） long．Their bodies are flat and winged，like underwater airplanes．And their noses are shaped like chainsaws．
Sawfish are predators of the sea．When a sawfish is hungry，it waves its sharp-toothed snout through a school of fish．Then，it lifts its nose and uses its mouth to inhale the injured victims．
Hardy populations of sawfish thrived in warm waters along coastlines around the world for thousands of years．Over the past 200 years，however，human actions have severely endangered sawfish．
Threats include fishing nets that snag the huge animals，often by mistake．Compared with other fish，sawfish reproduce late in life and at slow rates．These traits make it hard for them to recover from over fishing．
Some people collect sawfish snouts as trophies：One snout recently sold for nearly $1，600 on eBay．Shamans，or priests，in some Asian cultures，use the toothy snouts in ceremonies to repel demons and disease．And sawfish are also a delicacy．A growing demand in Asia for the animal's fins for a pricey soup has contributed to the fish's disappearance．
New efforts now aim to revive sawfish populations．Beginning next month，an international agreement will provide protection for all seven of the world's sawfish species．
"Until 1998，this fish had never been formally studied in the United States，"says Tonya Wiley of the Mote Marine Laboratory in Sarasota，Fla．"We didn't know such basic things as where they live，what habitat they use，how often they reproduce，how many young fish they have．"
Through historical studies and field research，scientists have become aware of how much the fish's numbers have dwindled．Today，there may be 90 percent fewer sawfish than there used to be．Wiley estimates that only 3，000 to 6，000 sawfish remain in US waters．
72．Which of the following is the best title for the passage？A
A．Long Nose，Hopeful Future B．The Mote Marine Laboratory
C．Sawfish in US D．The Past of the Sawfish
73．The sawfish got its name becauseC．
A．It can grow to be more than 6 meters long
B．Its body is flat and winged，like underwater airplanes
C．Its nose is shaped like chainsaws
D．It can be used as a saw to cut down the trees
74．The number of sawfish becomes smaller than before becauseB．
A．compared with other fish，sawfish reproduce early in life and at fast rates
B．in some Asian cultures，the toothy snouts can be used in ceremonies to repel demons and disease
C．sawfish are also smelly，which attracts people to kill them
D．fishing nets that snag the huge animals，often on purpose kill them
75．From the passage we can learn thatC．
A．scientists knew where they live，what habitat they use before 1998
B．scientists have become aware of how much the fish's numbers have dwindled until 1998
C．there may be 30，000 to 60，000 sawfish in the past
D．there may be 90 percent more sawfish than there used to be．
分析 文章主要介绍了Sawfish所面临的灭绝的危险，文章分析了具体的原因以及人们现在所采取的措施．因此一项国际协定将向世界上所有七个种类的锯鳐提供防护．
解答 72． A 主旨大意题． 根据文章内容，主要讲述了Sawfish所面临的危险，但是由于人们的措施，它在未来有可会得到很好的保护．their noses are shaped like chainsaws，他们的鼻子像链锯，相对比较长，结合选项，A就能概括出该文章的大意．有着长长鼻子的Sawfish，有着光明的未来．
73．C 细节理解题．根据文章These frightful creatures can grow to be more than 6 meters （nearly 20 feet） long．And their noses are shaped like chainsaws由此可知，这种生物身体会长很长，并且尤其鼻子长的像链锯，由此得到了锯鳐这个称呼，故选C．
74．B 细节理解题． 根据文章内容in some Asian cultures，use the toothy snouts in ceremonies to repel demons and disease以及A growing demand in Asia for the animal's fins for a pricey soup has contributed to the fish's disappearance 在亚洲，人们在祭祀时用它们的嘴来击退恶魔和疾病，并且食用他们的鳍等原因使得这种动物消失了，结合选项，答案为B．
75．C 细节理解题．根据文章最后一段的表述，Wiley estimates that only 3，000 to 6，000 sawfish remain in US waters可知Wiley 估计，在美国所剩的锯鳐的数量为3000到6000条．结合选项，故答案为C．
点评 本文是人文地理类阅读理解．做这类题材阅读理解时要求考生对文章通读一遍，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，结合选项选出正确答案．推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
