托福阅读：TPO4(Deer Populations of the Puget Sound)原文及答案

　　1. According to paragraph 1, which of the following is true of the white-tailed deer of Puget Sound?

　　○It is native to lowlands and marshes.

　　○It is more closely related to the mule deer of eastern Washington than to other types of deer.

　　○It has replaced the black-tailed deer in the open prairie.

　　○It no longer lives in a particular type of habitat that it once occupied.

　　Paragraph 2: Nearly any kind of plant of the forest understory can be part of a deer's diet. Where the forest inhibits the growth of grass and other meadow plants, the black-tailed deer browses on huckleberry, salal, dogwood, and almost any other shrub or herb. But this is fair-weather feeding. What keeps the black-tailed deer alive in the harsher seasons of plant decay and dormancy? One compensation for not hibernating is the built-in urge to migrate. Deer may move from high-elevation browse areas in summer down to the lowland areas in late fall. Even with snow on the ground, the high bushy understory is exposed; also snow and wind bring down leafy branches of cedar, hemlock, red alder, and other arboreal fodder.

　　2. It can be inferred from the discussion in paragraph 2 that winter conditions

　　○ cause some deer to hibernate

　　○ make food unavailable in the highlands for deer

　　○ make it easier for deer to locate understory plants

　　○ prevent deer from migrating during the winter

　　3. The word "inhibits" in the passage is closest in meaning to

　　○ consists of

　　○ combines

　　○ restricts

　　○ establishes

　　Paragraph 3: The numbers of deer have fluctuated markedly since the entry of Europeans into Puget Sound country. The early explorers and settlers told of abundant deer in the early 1800s and yet almost in the same breath bemoaned the lack of this succulent game animal. Famous explorers of the north American frontier, Lewis and Clark arrived at the mouth of the Columbia River on November 14, 1805, in nearly starved circumstances. They had experienced great difficulty finding game west of the Rockies and not until the second of December did they kill their first elk. To keep 40 people alive that winter, they consumed approximately 150 elk and 20 deer. And when game moved out of the lowlands in early spring, the expedition decided to return east rather than face possible starvation. Later on in the early years of the nineteenth century, when Fort Vancouver became the headquarters of the Hudson's Bay Company, deer populations continued to fluctuate. David Douglas, Scottish botanical explorer of the 1830s, found a disturbing change in the animal life around the fort during the period between his first visit in 1825 and his final contact with the fort in 1832. A recent Douglas biographer states:" The deer which once picturesquely dotted the meadows around the fort were gone [in 1832], hunted to extermination in order to protect the crops."

　　4. The phrase "in the same breath" in the passage is closest in meaning to

　　○ impatiently

　　○ humorously

　　○ continuously

　　○ immediately

　　5. The author tells the story of the explorers Lewis and Clark in paragraph 3 in order to illustrate which of the following points?

　　○The number of deer within the Puget Sound region has varied over time.

　　○Most of the explorers who came to the Puget Sound area were primarily interested in hunting game.

　　○There was more game for hunting in the East of the United States than in the West.

　　○Individual explorers were not as successful at locating games as were the trading companies.

　　6. According to paragraph 3, how had Fort Vancouver changed by the time David Douglas returned in 1832?

　　○The fort had become the headquarters for the Hudson's Bay Company.

　　○Deer had begun populating the meadows around the fort.

　　○Deer populations near the fort had been destroyed.

　　○Crop yields in the area around the fort had decreased.

　　Paragraph 4: Reduction in numbers of game should have boded ill for their survival in later times. A worsening of the plight of deer was to be expected as settlers encroached on the land, logging, burning, and clearing, eventually replacing a wilderness landscape with roads, cities, towns, and factories. No doubt the numbers of deer declined still further. Recall the fate of the Columbian white-tailed deer, now in a protected status. But for the black-tailed deer, human pressure has had just the opposite effect. Wildlife zoologist Helmut Buechner(1953), in reviewing the nature of biotic changes in Washington through recorded time, says that "since the early 1940s, the state has had more deer than at any other time in its history, the winter population fluctuating around approximately 320,000 deer (mule and black-tailed deer), which will yield about 65,000 of either sex and any age annually for an indefinite period."

　　7. Why does the author ask readers to recall “the fate of the Columbian white-tailed deer” in the discussion of changes in the wilderness landscape?

　　○To provide support for the idea that habitat destruction would lead to population decline

　　○To compare how two species of deer caused biotic changes in the wilderness environment

　　○To provide an example of a species of deer that has successfully adapted to human settlement

　　○To argue that some deer species must be given a protected status

　　8. The phrase “indefinite period” in the passage is closest in meaning to period

　　○ whose end has not been determined

　　○ that does not begin when expected

　　○ that lasts only briefly

　　○ whose importance remains unknown

　　9. Which of the following statements about deer populations is supported by the information in paragraph 4?

　　○Deer populations reached their highest point during the 1940s and then began to decline.

　　○The activities of settlers contributed in unexpected ways to the growth of some deer populations in later times.

　　○The cleaning of wilderness land for construction caused biotic changes from which the black-tailed deer population has never recovered.

　　○Since the 1940s the winter populations of deer have fluctuated more than the summer populations have.

　　Paragraph 5: The causes of this population rebound are consequences of other human actions. First, the major predators of deer—wolves, cougar, and lynx—have been greatly reduced in numbers. Second, conservation has been insured by limiting times for and types of hunting. But the most profound reason for the restoration of high population numbers has been the fate of the forests. Great tracts of lowland country deforested by logging, fire, or both have become ideal feeding grounds of deer. In addition to finding an increase of suitable browse, like huckleberry and vine maple, Arthur Einarsen, longtime game biologist in the Pacific Northwest, found quality of browse in the open areas to be substantially more nutritive. The protein content of shade-grown vegetation, for example, was much lower than that for plants grown in clearings.

　　10.The word “rebound” in the passage is closest in meaning to

　　○ decline

　　○ recovery

　　○ exchange

　　○ movement

　　11.Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.

　　○Arthur Einarsen’s longtime family with the Pacific Northwest helped him discover areas where deer had an increase in suitable browse.

　　○Arthur Einarsen found that deforested feeding grounds provided deer with more and better food.

　　○Biologist like Einarsen believe it is important to find additional open areas with suitable browse for deer to inhabit.

　　○According to Einarsen, huckleberry and vine maple are examples of vegetation that may someday improve the nutrition of deer in the open areas of the Pacific Northwest.

　　12.Which of the following is NOT mentioned in paragraph 5 as a factor that has increased deer populations?

　　○A reduction in the number of predators

　　○Restrictions on hunting

　　○The effects of logging and fire

　　○Laws that protected feeding grounds of deer