6．Hawaii is an important trading center and about six million tourists visit there every year．With all that traffic in and out，exotic species（外来物种）have plenty of opportunities to reach the islands．According to biologists，exotic species are the number one threat to the state's economy，environment，and way of life．
The question in Hawaii is，can the invaders be stopped？
Quarantines are one way to do this．Quarantine is the process of isolating animals or products．In Hawaii，pet dogs and cats coming into the state remain in a special holding facility for four months to make sure they don't have rabies（狂犬病） Many agricultural products are also quarantined to see if they are carrying insect pests or plant diseases．
Inspection is a second way to stop biological invaders．At airports，borders，and shipping ports，inspectors examine passengers and their baggage to see if they are carrying exotic species．The inspectors also destroy fruits，vegetables，or other goods that might be carrying harmful pests or diseases．Specially trained dogs also smell goods in the ship for exotic species．
What if an exotic species slips by inspectors？Then efforts are made to control the invader．In Hawaii，government agencies control invaders by setting livetraps around wildlife shelters and other places．At Haleakala National Park employees have built miles of fences to keep out exotic pigs and goats．For years these animals ate and walked over native rain forest plants，hut the fences have helped reverse（逆 转）this damage．Now native plants grow in places that were bare rock only a short time ago．
In some cases biological control helps to solve the exotic species problems．It is the science of controlling one invader with another．In the early 1900s，several exotic predators（肉食动物） were imported to Hawaii to eat a harmful exotic pest called the sugarcane leafhopper．The insect was destroying 70，000 tons of sugar a year，but the predators brought it under control．
The efforts of these scientists and other people are vitally important．In Hawaii alone，10，000 different species of native plants and animals still need to be protected．Many of these are found nowhere else on earth．By stopping the spread of the biological invaders，we not only protect ourselves，but we also protect the many other native species that make our planet such a special place to live．
63．This passage is mainly aboutA．
A．the methods for preventing exotic species
B．the effects of exotic invasion on Hawaii
C．the problems faced by the Hawaiian economy
D．the role of biologists in controlling native species
64．Hawaii is at a great risk of invasion by exotic species，becauseC．
A．many agriculture products grow there
B．regular inspections of animals are useless
C．millions of people go to Hawaii each year
D．biological control efforts have not worked
65．Which of the following statements is true？A
A．Animals and products are put in quarantines before entering Hawaii．
B．Trained dogs are used to examine passengers and their baggage．
C．Livetraps and fences are set to protect exotic pigs and goats．
D．Some exotic predators are imported to destroy invaders'food．
66．What argument does the author make in the last paragraph？B
A．Hawaii has the most unknown species of plants on earth．
B．Humans have a responsibility to control exotic species．
C．Scientists make the difference to the species protection．
D．Species should be allowed to exist without human interruption．
分析 本文论述了夏威夷采取的种种控制外来物种入侵的措施及所取得了成果．
解答 ACAB
63．A 本题考查主旨大意．文章从第三段开始到第六段，每一段的第一句即主旨句，论述了夏威夷采取的种种控制外来物种入侵的措施，最后一点进行了综合概括，从而可以推断出文章的主旨就是：阻止外来物种入侵的手段．
64．C 本题考查考生的细节查找能力．根据文章第一段Hawaii is an important trading center and about six million tourists visit there every year．With all that traffic in and out，exotic species（外来物种）have plenty of opportunities to reach the islands．可知夏威夷面临物种入侵的危险是因为每年有数百万的人来此观光旅行．
65．A 本题考查考生的细节查找能力．根据第三段In Hawaii，pet dogs and cats coming into the state remain in a special holding facility for four months to make sure they don't have rabies（狂犬病）．Many agricultural products are also quarantined to see if they are carrying insect pests or plant diseases．可知动物和农作物在进入夏威夷之前要先进行隔离．根据Specially trained dogs also smell goods in the ship for exotic species．可排除B项；根据倒数第三段government agencies control invaders by setting livetraps around wildlife shelters and other places．可排除C项；根据倒数第二段several exotic predators（肉食动物） were imported to Hawaii to eat a harmful exotic pest…可排除D项．
66．B 本题考查考生的推理判断能力．根据最后一段：A项中的 the most与事实不符；C项与倒数第一段第一句The efforts of these scientists and other people are vitally important．不符；D项中的without human interruption文章未提到．
点评 做阅读时经常犯错的主要原因是，仅凭读过文章后残留在脑海中的一丝印象来勾选答案，这样便很容易掉入出题人故意设布下的题目陷阱．所谓阅读理解，对于题目的理解一定要忠实于原文，因此，每一道题都应该与原文作全面的对比与核查，再得出答案．也就是说，阅读理解的每一道题目，在原文都应该有明确的出处，我们把这一出处叫做原文相关句，（1）排除与原文相关句主题不一致的选项（2）排除与原文相关句态度相反的选项 （3）排除用于过于极端或负面的选项（4）注意结合文章主旨和主题去排除．
