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The ocean bottom, a region nearly 2．5 times greater than the total land area of the Earth, is even today largely unexplored．Until about a century ago, the deep-ocean floor was completely inaccessible and hidden beneath waters averaging over 3,600 meters deep．Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a strangeenvironment to humans, in some ways as forbidding and remote as the outer space．
Although researchers have taken samples of deep-ocean rocks for over a century, the first detailed global study of the ocean bottom did not actually start until 1969, with the beginning of the National Science Foundation’s Deep Sea Drilling Project(DSDP)．Using techniques first developed for the offshore oil and gas industry, the DSDP’ s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, taking samples of rock from the ocean floor．
The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983．During this time, it sailed 600,000 kilometers and took almost 20,000 samples of rocks aroun d the world．Those samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to make out what it will probably look like millions of years in the fu ture, Today, largely on the strength of evidence gathered during the Glomar Challenger’ s voyages, nearly all earth scientists agree on the theories of plate tectonics （构造学）and continental drift that explain many of the geological processes．
The samples of rocks drilled by the Glomar Challenger have also provided a climatic record stretching back hundreds of millions of years．The information of past climatic change can be used to predict future climates．
68．What does the underlined word “inaccessible” in line 3 means?
A．unrecognizable B．unreachable C．unusable D．unreasonable
69．Why does the author mention “outer space” in the first paragraph?
A．The Earth’s climate millions of years ago was similar to that in outer space．
B．It is similar to the ocean floor in being strange to the humans．
C．Rock formations in outer space are similar to those found on the ocean floor
D．Techniques used by scientists to explore outer space were similar to those used in ocean exploration
70．Which of the following is true of the Glomar Challenger?
A．It is a type of submarine． B．It is an ongoing project．
C．It has gone on over 100 voyages． D．It made its first DSDP voyage in 1968．
71．Which of the following is NOT mentioned in the passage as being a result of the Deep sea Drilling Project?
A．Geologists were able to determine the Earth’s appearance millions of years ago．
B．Two geological theories became more widely accepted by scientists．
C．Geologists observed forms of life never before seen
D．Information was revealed about the Earth’s past climatic changes．
查看习题详情和答案>>The ocean bottom, a region nearly 2．5 times greater than the total land area of the Earth, is even today largely unexplored．Until about a century ago, the deep-ocean floor was completely inaccessible and hidden beneath waters averaging over 3,600 meters deep．Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a strangeenvironment to humans, in some ways as forbidding and remote as the outer space．
Although researchers have taken samples of deep-ocean rocks for over a century, the first detailed global study of the ocean bottom did not actually start until 1969, with the beginning of the National Science Foundation’s Deep Sea Drilling Project(DSDP)．Using techniques first developed for the offshore oil and gas industry, the DSDP’ s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, taking samples of rock from the ocean floor．
The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983．During this time, it sailed 600,000 kilometers and took almost 20,000 samples of rocks aroun d the world．Those samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to make out what it will probably look like millions of years in the fu ture, Today, largely on the strength of evidence gathered during the Glomar Challenger’ s voyages, nearly all earth scientists agree on the theories of plate tectonics （构造学）and continental drift that explain many of the geological processes．
The samples of rocks drilled by the Glomar Challenger have also provided a climatic record stretching back hundreds of millions of years．The information of past climatic change can be used to predict future climates．
68．What does the underlined word “inaccessible” in line 3 means?
A．unrecognizable B．unreachable C．unusable D．unreasonable
69．Why does the author mention “outer space” in the first paragraph?
A．The Earth’s climate millions of years ago was similar to that in outer space．
B．It is similar to the ocean floor in being strange to the humans．
C．Rock formations in outer space are similar to those found on the ocean floor
D．Techniques used by scientists to explore outer space were similar to those used in ocean exploration
70．Which of the following is true of the Glomar Challenger?
A．It is a type of submarine． B．It is an ongoing project．
C．It has gone on over 100 voyages． D．It made its first DSDP voyage in 1968．
71．Which of the following is NOT mentioned in the passage as being a result of the Deep sea Drilling Project?
A．Geologists were able to determine the Earth’s appearance millions of years ago．
B．Two geological theories became more widely accepted by scientists．
C．Geologists observed forms of life never before seen
D．Information was revealed about the Earth’s past climatic changes．
查看习题详情和答案>>One topic is rarely mentioned in all the talk of improving standards in our schools: the almost complete failure of foreign-language teaching. As a French graduate who has taught for more than twenty-five years, I believe I have some idea of why the failure is so total. 21 the faults already found out in the education system as a whole — such as child-centred learning, the “discovery” method, and the low expectations by teachers of pupils — there have been several serious 22 which have a direct effect on language teaching.
The first is the removal from the curriculum (课程) of the thorough teaching of English 23 . Pupils now do not know a verb from a noun, the subject of a sentence from its object, or the difference between the past, present, or future.
Another important error is mixed-ability teaching, or teaching in ability groups so 24 that the most able groups are 25 and are bored while the least able are lost and 26 bored. Strangely enough, few head teachers seem to be in favour of mixed-ability school football teams.
Progress depends on memory, and pupils start to forget immediately they stop having 27 lessons. This is why many people who attended French lessons at school, even those who got good grades, have 28 it a few years later. Because they never need it, they do not practice it.
Most American schools have accepted what is inevitable and 29 modern languages, even Spanish, from the curriculum. Perhaps it is time for Britain to do the same, and stop 30 resources on a subject which few pupils want or need.
21. A. Due to B. In addition to C. Instead of D. In spite of
22. A. errors B. situations C. systems D. methods
23. A. vocabulary B. culture C. grammar D. literature
24. A. wide B. similar C. separate D. unique
25. A. kept out B. turned down C. held back D. left behind
26. A. surprisingly B. individually C. equally D. hardly
27. A. extra B. traditional C. basic D. regular
28. A. needed B. forgotten C. practised D. left
29. A. restored B. absorbed C. prohibited D. withdrawn
30. A. wasting B. focusing C. exploiting D. sharing
查看习题详情和答案>>. It is difficult for us to learn a lesson in life __________ we’ve actually had that lesson.
A. until B. after
C. since D. when
查看习题详情和答案>>If you travel around the world , you will be surprised to find just how different the foreign customs can be from your own .
A visitor to India would do well to remember that people there consider it impolite to use the left hand for passing food at table . The left hand is supposed to be used for washing yourself . Also in India , you might see a man apparently shaking his head at another and assume that he is disagreeing . But in many parts of India a shake of the head is a gesture that shows agreement of acceptance .
Nodding your head when offered a drink in Bulgaria is likely to leave you thirsty . In that country you shake your head to indicate “yes” —a nod indicates “no”. The Arabs are known for their hospitality . At a meal in countries on the Arabic Peninsula , you will find that any drinking vessel （容器，器皿）is repeatedly refilled as soon as you drink it up .
In Europe it is quite usual to cross your legs when sitting talking to someone , even at an important meeting . Doing this when meeting an important person in Thailand , however , could cause offence . It is too informal an attitude for such an occasion . Also when in Thailand you are not supposed to touch the head of an adult —it’s just not done . In Japan , it is quite usual for men to plan evening entertainments for themselves and leave their wives at home . In Europe such attitudes are disappearing .
Customs vary from country to country . Visitors may be at a loss as to what to do in a foreign environment . In such circumstances , the golden rule to follow is : When in Rome , do as the Romans do .
60．In which country , a left — hand is not welcomed ? .
A．Thailand B．India C Arabic peninsula D．Bulgaria
61．In which country , if someone shakes his head at another , it shows that he agrees or accepts ?
.
A．Bulgaria B．Thailand C．China D．Arabic Peninsula
62．Which of the following is impolite in Europe ? .
A．to cross your legs
B．to touch the head of an adult
C．That men plan evening entertainment and leave their wives at home
D．To drain the glass in your hand
63．If you don’t know the customs in the country where you visit , the golden rule to follow is .
A．to do as the Romans do B．to do nothing
C．to visit Rome only D．to do as the natives do
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