老托福阅读理解原文、真题及答案

老托福阅读理解原文、真题及答案

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1995.08

Question 1-9

Investigation of the Deep-Ocean

Keywords: ocean, researchers, techniques, samples, rocks

The ocean bottom – a region nearly 2.5 times greater than the total land area of the Earth – is

the deep –ocean floor was completely hidden beneath waters averaging over 3,6000 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

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, the Glomar Challenger, was able to maintain a steady position on the ocean's surface and

The Glomar Challenger completed 96 voyages in a 15 – year research program that ended in November 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger's core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like

Glomar Challenger's voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth.

The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world's past climates. Deep – ocean sediments provide a climatic

record stretching back hundreds of millions of years, are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land –based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change –information that may be used to predict future climates.

(A) is not a popular area for scientific research

(B) contains a wide variety of life forms

(C) attracts courageous explorers

(D) is an unknown territory

(A) unrecognizable

(B) unreachable

(C) unusable

(D) unsafe

3. The author mentions in line 5 because

(A) the Earth's climate millions of years ago was similar to conditions in outer space

(B) it is similar to the ocean floor in being alien to the human environment

(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

4. 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.

(A) breaking

(B) locating

(C) removing

(D) analyzing

6. The Deep Sea Drilling Project was significant because it was

(A) an attempt to find new sources of oil and gas

(B) the first extensive exploration of the ocean bottom

(C) composed of geologists from all over the world

(D) funded entirely by the gas and oil industry

(A) basis

(B) purpose

(C) discovery

(D) endurance

(A) years

(B) climates

(C) sediments

(D) cores

9. 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 hundreds of millions of years

ago.

(B) Two geological theories became more widely accepted by scientists.

(C) Information was revealed about the Earth's past climatic changes.

(D) Geologists observed forms of marine life never before seen.