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  3. Man is a land animal, but he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea ha

Man is a land animal, but he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea ha

admin2012-09-11  42
问题     Man is a land animal, but he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea has provided man with food and a convenient way to travel to many parts of the world. Today, experts believe that nearly two-thirds of the world’s population live within eighty kilometers of the seacoast.
    In the modern technological world the sea offers many resources to help mankind survive. Resources on land are beginning to grow less. The sea, however, still offers hope to supply many of man’s needs in the future.
    The riches of the sea yet to be developed by man’s technology are impressive. Oil and gas explorations have existed for nearly thirty years. Valuable amounts of minerals such as iron, copper and so on exist on the ocean floor.
    Besides oil and gas, the sea may offer new sources of energy. For example, warm temperature of the ocean can be used as the steam in a steamship. Sea may also offer a source of energy as electricity for mankind.
    Technology is enabling man to explore even deeper under the sea. It is obvious that the technology to harvest the sea continues to improve. By the year 2050, experts believe that the problems to explore the food, minerals and energy resources of the sea will have been largely solved.
It can be inferred from the passage that______.
选项 A、man hasn’t completely made use of the riches of the sea
B、technology for exploring the sea has been solved
C、harvesting rice in the sea will be made possible
D、in the near future man can live on the ocean floor
答案A
解析 人类还没有完全利用海洋的丰富资源。文章的第二段提到，随着陆地资源的日益枯竭，海洋还能为人类未来的需求提供资源。第三段的开头承接说，海洋可开发的资源的丰富程度是惊人的。所以选A。
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