【正文】 mber of materials. D23. In nature, the distributive of plants is obviously related to climate. A B C D24. The United States Constitution requires that the President be a naturalborn citizen, thirty A Bfive years of age or be older, who has lived in the United States for a minimum of fourteen years. C D25. How many people realize that Marjorie Kinnan Rawlings The yearling is a minor literary A B Cclassic and an important contribute to regional literature? D26. Ensuring an adequate water supply have been a concern ever since people began to live in A B C Dtowns and cities.27. The most substances expand in volume when they are heated. A B C D28. Due to sophisticated transportation networks, people can now buy the same types of A B perishable goods in Toronto like in New York City. C D29. Glaciers that develop nearly the North and South Poles advance into the sea, break into A B C Dpieces, and bee icebergs.30. As inevitably as human culture has changed with the passing of time, so does the A B C Denvironment.31. For some purposes it is convenient to think of a surface as the locus generated when a line A B straight or a curve moves through space in a prescribed manner. C D32. A significant proportions of the plants and animals of Hawaii exists nowhere else in the A B CWorld D33. Mass advertising is employed when person – to – person selling is impractical, impossible, or A Bsimply inefficiency. C D34. Mexican jumping beans are actually seeds in which contain moth larvae whose activity A B C Dcauses the seeds to jump.CPassage 1Scientists estimate that about 35,000 other objects, too small to detect with radar but detectable with powerful Earth based telescopes, are also circling the Earth at an altitude of 200 to 700 miles. This debris poses little danger to us on the Earth, but since it is traveling at average relative speeds o~ six miles per second, it can severely damage expensive equipment in a collision. This threat was dramatized by a cavity one eighth of an inch in diameter created in a window of a United States space shuttle in 1983. The pit was determined to have been caused by a collision with a speck of paint traveling at a speed of about two to four miles per second. The window had to be replaced.As more and more nations put satellites into space, the risk of collision can only increase. Me3sures are already being taken to control the growth of orbital debris. The United States has always required its astronauts to bag their wastes and return them to .Earth. The United States Air Force has agreed to conduct low altitude rather than high altitude tests of objects it puts into space so debris from tests will reenter the Earth39。them in line 11 refers to which of the following?(A)Astronauts(B)Wastes(C)Tests(D)Crew modules2. Which of the following questions is NOT answered by the information in the passage?(A)How can small objects orbiting the Earth be seen? (B)What is being done to prevent orbital debris from increasing?(C)Why is the risk of damage to space equipment likely to increase? (D)When did the United States Air Force begin making tests in space? in the passage does the writer mention a method of protecting space vehicles against damage by space debris?(A)Lines 13(B)Lines 68(C)Line 9(D)Lines 1315Passage 2Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too small for the human eye to see. They drift about lazily with the currents, providing a basic food for many larger animals, Plankton has been described as the equivalent of the grasses that grow ~n the dry land continents, and the parison is an appropriate one. In potential food value, however, plankton far outweighs that of the land grasses. One scientist has estimated that white grasses of the world produce about 49 billion tons of valuable carbohydrates each year, the sea39。s resources loom even more important as a means of feeding an expanding world population. No one yet has seriously suggested that planktonburgers may soon bee popular around the world. As a possible farmed supplementary food source. however, plankton is gaining considerable interest among marine scientists. One type of plankton that seems to have great harvest possibilities is a tiny shrimplike creature called knil. Growing to two or three inches long. krill provide the major food for the giant blue wriale. the largest animal ever to inhabit the Earth. flealizing that this whale may grow to 100 feet and weigh 150 tons at maturity, it is not surprising that each one devours more than one ton of krill daily. Krill swim about just below the surface in huge schools sometimes miles wide, mainly in the cold Antarctic. Because of their pink color, they often appear as a solid reddish mass when viewed from a ship or from the air. Krill are very high in food value A pound of these crustaceans contains about 460 caloriesabout the same as shrimp or lobster to which they are related. If the krill can feed such huge creatu