托福TPO4阅读解析版.docx

TPO-4
Deer Populations of the Puget Sound
Two species of deer have been prevalent in the Puget Sound area of Washington State in the Pacific Northwest of the United States. The black-tailed deer, a lowland, west-side cousin of the mule deer of eastern Washington, is now the mon. The other species, the Columbian white-tailed deer, in earlier times mon in the open prairie country; it is now restricted to the low, marshy islands and flood plains along the lower Columbia River.
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? pensation for not hibernating is the built-in urge to migrate. A Deer may move from high-elevation browse areas in summer down to the lowland areas in late fall. B 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.
C The numbers of deer have fluctuated markedly since the entry of Europeans into Puget Sound country. D 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 ulent 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