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TOEFL全真试题（1-2）

发布时间：2006-06-21 20:52 点击：

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READING　COMPREHENSION

Questions 1-9

　　　The ocean bottom ------a region nearly 2.5 times greater than the total land area of the

Earth ---- is a vast frontier that even today is largely unexplored and uncharted. Until

about a century ago, the deep-ocean floor was completely inaccessible, 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 hostile environment to humans, in some ways as forbidding and remote as the void

of outer space.

　　　Although researchers have taken samples of deep-ocean rocks and sediments for

over a century, the first detailed global investigation of the ocean bottom did not

actually start until 1968, 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, theGlomar Challenger, was able to maintain a

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