题目内容：
听材料，回答下列各题：Directions: In this section, you will hear a passage three times. When the passage is read for the firsttime, you should listen carefully for its general idea. When the passage is read for the second time, youare required to fill in the blanks with the exact words you have just heard. Finally, when the passage isread for the third time, you should check what you have written.
Man is a land animal, but he is also closely tied to the sea. (26) ___ history the sea has survivedthe needs of man. The sea has provided man with food and a (27) __ way to travel to many partsof the world. Today, experts (28) __ that nearly two-thirds of the world's population lives withineighty kilometers of the seacoast.
In the modem technological world the sea offers many resources to help mankind (29) ___Resources on land are beginning to grow less. The sea, however, still offers hope to (30)___many ofman's needs.
The riches of the sea yet to be developed by man's technology are (31) __. Oil and gasexploration has existed for nearly thirty years. Valuable amounts of (32) such as iron, nickel andcopper exist on the ocean floor, ready to be (33) __
Fish farming promises to be a good way to produce large quantities of food. The culture of fish and
selfish is an ancient skill practiced in the past mainly by (34) __ peoples.
Besides oil and gas, the sea may offer new sources of energy. Experts believe that the warmtemperature of the ocean can be used in a way similar to that of the steam in a steamship. Ocean currentsand waves offer possible use as a source of hydroelectric power.
Technology is enabling man to explore even deeper under the sea. New undersea technology isproviding divers with diving suits and (35) __ that are kept at sea-level pressure. The developmentof strong, new materials has made this possible.
第(26)题________
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