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  3. We human beings are land animals, but we are also closely tied to the sea. T

We human beings are land animals, but we are also closely tied to the sea. T

游客2023-07-15  38
问题     We human beings are land animals, but we are also closely tied to the sea. Throughout history, the sea has【B1】______our needs.
    The sea has provided us with food, and【B2】______way to travel to many parts of the world. Today, experts【B3】______that nearly 2/3 of the world’s population live within 80 kilometers off the sea coast. In the modern【B4】______world, the sea offers many resources to help us survive. Resources on land are beginning to grow less. The sea, however, still offers hope to supply many of our needs.
    The riches of the sea yet to be developed by technology are【B5】______.Oil and gas explorations have existed for nearly 30 years.【B6】______amounts of minerals, such as iron, nickel and copper exist on the ocean floor ready to be mined.  Fish farming promised to be a good way to produce large【B7】______of food. Tile【B8】______of fish and shellfish is an ancient skill practiced in the past mainly by oriental people.
    Besides oil and gas, the sea may offer new source of energy.【B9】______such as hydro-electric power.
    Technology is enabling people to explore ever deeper under the sea. The new under-sea technology is providing divers with diving suits and under-sea chambers that are kept at sea-level pressure.【B10】______
    The technology to harvest the sea continues to improve.【B11】______ [br] 【B5】
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