新理念綜合教程book4單元測試-預(yù)覽頁
【正文】 gical diversity. The high rate of species extinctions in these environments is jolting, but it is important to recognize the significance of biological diversity in all ecosystems. As the human population continues to expand, it will negatively affect one after another of Earth39。However, nothing has ever equaled the magnitude and speed with which the human species is altering the physical and chemical world and demolishing the environment. In fact, there is wide agreement that it is the rate of change humans are inflicting, even more than the changes themselves, that will lead to biological devastation. Life on Earth has continually been in flux as slow physical and chemical changes have occurred on Earth, but life needs time to adapt — time for migration and genetic adaptation within existing species and time for the proliferation of new genetic material and new species that may be able to survive in new environments. 26. Which is the best title of the passage?A. The Variety of SpeciesB. The Rapid Destruction of the Tropical Rain ForestC. Species39。 3Within the various uses of the word today, nature may refer to the general realm of various types of living plants and animals, 4and in some cases to the processes associated with inanimate 5objects–the way that particular types of things exist and change 6of their own accord, such as the weather and geology of the the matter and energy of which all these things are posed.7 It is not often taken to mean the natural environment or wilderness–wild animals, rocks, forest, beaches, and in general those things that8 have not been substantially altered by human intervention, or which persist despite human intervention. For, example, manufactured objects and human interaction generally are not considered part of nature, unless qualified as, for example, human nature or the whole of nature. 9This more traditional concept of natural things, which can still be found today, implies a distinction between the natural and the artificial, 10with the artificial being understood as that which has been brought into being by a human consciousness or a human mind.
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