2000年5月托福阅读解析第一篇.pdf

新托福专业备考社区 2000年5月第一篇 Questions 1-9 The canopy, the upper level of the trees in the rain forest, holds a plethora of climbing mammals of moderately large size, which may include monkeys, cats, civets, and porcupines. Smaller species, including such rodents as mice and small squirrels, are not Line as prevalent overall in high tropical canopies as they are in most habitats globally. Comment 1: 虽 (5) Small mammals, being warm blooded, suffer hardship in the exposed and turbulent 然小的体型易于 在冠层的树枝间 environment of the uppermost trees. Because a small body has more surface area per unit 攀爬以寻找虫 子、花朵或者果 of weight than a large one of similar shape, it gains or loses heat more swiftly. Thus, in 实，但在觅食的 the trees, where shelter from heat and cold may be scarce and conditions may fluctuate, a 竞争中，体型大 的哺乳动物在食 small mammal may have trouble maintaining its body temperature. 物丰饶的枝梢端 却有自己独特的 (10) Small size makes it easy to scramble among twigs and branches in the canopy for 觅食技巧，并胜 过了体型小的哺 insects, flowers, or fruit, but small mammals are surpassed, in the competition for food, 乳动物。 by large ones that have their own tactics for browsing among food-rich twigs. The weight of a gibbon (a small ape) hanging below a branch arc