The Ice Age
Twenty thousand years ago, the earth was held in control by relentlessly (不宽容地) probing fingers of ice that drew power from frigid strongholds in the north and crept southwestward to bury forests, fields, and mountains. Landscapes that were violated by the slowly moving glaciers(冰川)would carry the scars of this advance far into the future. Temperatures dropped deeply, and land surfaces in many parts of the world were depressed by the unrelenting weight of the thrusting ice. At the same time, so much was drawn from the oceans to form these huge glaciers that sea levels around the world fell by three hundred and fifty feet, and large areas of the continental shelf became dry land.
This period of the Earth’s history had come to be called the Ice Age. In all, about eleven million square miles of land were covered with ice. The Ice Age terminated about fourteen thousand years ago when the ice sheets began to retreat. It took about seven thousan
A. Right
B. Wrong
C. Not mentioned
| Ten thousand years ago, as the last ice
age drew to a close, sea levels around the world were far lower than they are
today. Much of the land under the North Sea and the English Channel was part of
a huge region of forests and grassy plains. Then the climate gradually became
warmer and the water trapped in glaciers and ice caps was released. This ancient
land was submerged in the resulting deluge and all that remains to tell us that
it was once lush and verdant— and inhabited — is the occasional stone tool,
harpoon or mammoth tusk brought up from the sea bed by fishing boats. Now the development of advanced sonar technology, known as bathymetry, is making it possible to study this flooded landscape in extraordinary detail. While previous devices have only been able to produce two-dimensional images, bathymetry makes use of computers, satellite positi A. (A) inspire more young people to take up archaeology B. (B) modify the attitudes of the British to their country’s history C. (C) provide confirmation about the dangers of global warming D. (D) alter the perception other countries have about Britain 我来回答: 提交
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