【托福阅读】精选阅读真题长难句50句.doc

【托福阅读】精选阅读真题长难句50句 　　1、 Later experiments in which researchers played recordings of songs to young 　　birds showed just how precise this influence was, many of them would learn 　　the exact pattern of the recording they had heard. 　　2、 The crude song of a bird reared in isolation gives some clues as to what this 　　rough idea may be the length, the frequency range and the breaking up into 　　notes are all aspects of chaffinch song shared between normal birds and 　　those reared in isolation. 　　3、 Whatever the nature of the learning rules in a particular species, there is no 　　doubt that they are effective, it is very unusual to hear a wild bird singing a 　　song which is not typical of its own species despite the many different songs 　　which often occur in a small patch of woodland. 　　4、 Chemical analysis of bones enables archaeologists to determine the 　　proportion of meat to vegetable foods in the diet by measuring the proportion 　　of calcium to strontium in ancient bone because strontium in place of calcium 　　in bones comes primarily from ingested plants. 　　5、 Each dwelling had a different arrangement of the giant bones, which came 　　from the skeletons of long-dead animals retrieved from the surrounding area 　　by occupants of the site, not from animals they had recently hunted. 　　6、 In a precedent-setting decision, the Federal Energy Regulatory Commission 　　ordered the dam removed after concluding that the environmental and 　　economic benefits of a free-flowing river outweighed the electricity generated 　　by the dam. 　　7、 Built nearly a century ago to provide power to lumber and paper mills in the 　　town of Port Angeles, these dams blocked access to upstream spawning beds 　　for six species of salmon on what once was one of the most productive 　　salmon rivers in the world. 　　8、 The Hetch Hetchy Dam in Yosemite National Park might be taken down to 　　reveal what John Muir, the founder of the prestigious environmental 　　organization Sierra Club, called a valley “just as be