阅读理解 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. Toady, 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 2050. Experts believe that the problems to explore the food, minerals and energy resources of the sea will have been largely solved.
单选题 What is the beat title for the passage?
【正确答案】 D
【答案解析】这篇文章主要讲的海洋资源的利用。作者一直在强调，技术在海洋资源探测中所起到的重要作用。并在文章结尾说，随着技术的进步，从海洋中发掘食物、矿物和新能源的问题将在很大程度上得到解决。
单选题 It can be inferred from the passage that______.
【正确答案】 A
【答案解析】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，海洋可开发的丰富的资源是非常惊人的。所以选A．
单选题 Why does the author mention a steamship?
【正确答案】 A
【答案解析】作者在文章中提到蒸汽船，就是为了说明人类可以利用很多种海洋资源。文章第四段说，除了石油和天然气，海洋还提供了很多新能源，接着就以蒸汽船为例证明这一点。
单选题 According to the author, technology is important because______.
【正确答案】 B
【答案解析】人类可以利用技术开发深海。第三段第一句作者提到，人类利用技术可以开发的海洋资源是惊人的。其他三项都没有提到。
单选题 According to the author, when will the problems to explore the deeper sea largely be solved?
【正确答案】 D
【答案解析】21世纪五十年代。就是2050年左右。