精选400句托福阅读长难句(OG&TPO)四
托福阅读文中，长难句也是很多同学比较困恼的内容，这些难句句型复杂，信息量比较大，如果我们不能掌握这些长难句，那么在接下来的做题中，也会面临比较大的困难。因此为大家汇总了一些比较典型的长难句，供大家参考练习。
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31.It should be noted, however, that the pure opportunist or pure competitor is rare in nature, as most species fall between the extremes of a continuum, exhibiting a blend of some opportunistic and some competitive characteristics.
32.Because some paintings were made directly over others, obliterating them, it is probable that a painting’s value ended with the migration it pictured.
33.One Lascaux narrative picture, which shows a man with a birdlike head and a wounded animal, would seem to lend credence to this third opinion, but there is still much that remains unexplained.
34.Perhaps so much time has passed that there will never be satisfactory answers to the cave images, but their mystique only adds to their importance.
35.In 1994 there were nearly 20,000 wind turbines worldwide, most grouped in clusters called wind farms that collectively produced 3,000 megawatts of electricity.
36.Most were in Denmark (which got 3 percent of its electricity from wind turbines) and California (where 17,000 machines produced 1 percent of the state’s electricity, enough to meet the residential needs of a city as large as San Francisco).
37.In the long run, electricity from large wind farms in remote areas might be used to make hydrogen gas from water during periods when there is less than peak demand for electricity.
38.Large wind farms might also interfere with the flight patterns of migratory birds in certain areas, and they have killed large birds of prey (especially hawks, falcons, and eagles) that prefer to hunt along the same ridge lines that are ideal for wind turbines.
39.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.
40.The researchers Peter Ucko and Andree Rosenfeld identified three principal locations of paintings in the caves of western Europe: (1) in obviously inhabited rock shelters and cave entrances; (2) in galleries immediately off the inhabited areas of caves; and (3) in the inner reaches of caves, whose difficulty of access has been interpreted by some as a sign that magical-religious activities were performed there.
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