10．The best title for this passage would be . A．The Evidence of the Continental Drift B——青夏教育精英家教网—

摘要：10．The best title for this passage would be . A．The Evidence of the Continental Drift B．The Movement of the Two Continents C．The Continental Drift D．The History of the Earth.

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阅读理解

阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。

　　Have you ever noticed, when looking at a map of the world, that the east coast of South America and the west coast of Africa look as though they might fit together? If you have, you are not alone. In 1965 the English scientist Sir Edward Bullard used a computer to test the fit of the two continents and found that at an ocean depth of 2,000 metres the match was very close indeed.

　　It seems too remarkable to be possible, but there is a lot of evidence (证据) to suggest that Africa was once joined to South America. For example, there is a belt of ancient rocks along the east coast of Brazil which is similar to the rocks across the South Atlantic in West Africa.

　　There is further evidence that existing land masses were once linked. The remains of a 400-to-500-million-year-old mountain chain has been found running down the eastern part of Greenland, western Scandinavia, and through north-west Scotland and Ireland, into western Canada, eventually finding their way to north-west Africa.

　　Then there is the evidence from life itself. In various parts of the world today the same animals and plants can be found on land masses separated by, in some cases, thousands of miles of oceans. Did they develop at the same time in two different places? It seems unlikely. Biologists believe that there must have been land bridges which have now sunk beneath the sea. Also fossils (化石) found in sedimentary rocks (fossils are the preserved remains of life forms) have allowed geologists to trace the same plants from South America, and Antarctica (北极) in rocks perhaps 300 million years old.

　　The ice that is now confined to (限制) the polar regions (北极或南极地区) has not always been so limited in extent. Indeed, during a period of the Earth's history known as the permocar-boniferors age (二叠石炭纪) about 250-350 million years ago there is evidence from the rocks that there were glaciers covering South America, parts of Africa, India, Australia, as well as Antarctica. On the other hand, in the northern hemisphere (北半球), there were deserts. If the continents spread out as they are today, it is hard to understand how this could be.

　　So there is considerable evidence to show whole continents moved apart, and naturally many people have tried to discover how and why whole land masses moved.

1．How many proofs does the author give in this passage?

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2．The underlined part “…eventually finding their way to north-west Africa.” means ________.

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A．the mountain chain goes from the eastern part of Greenland to north-west Africa

B．it is a long way from the eastern pad of Greenland to north-west Africa

C．we can also find these remains in north-west Africa

D．we can find a way from the eastern part of Greenland to north-west Africa