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Q4:
The passage is primarily concerned with A. evaluating the evidence of a major geologic period and determining its duration B. describing an evolutionary phenomenon and speculating about its cause C. explaining the mechanisms through which marine life-forms evolved during a particular period D. analyzing the impact on later life-forms of an important evolutionary development E. contrasting a period of evolutionary change with other such periods --------------------------------------------------------------- Q5.
Which of the following can be inferred from the passage regarding the geologic changes that occurred during Ordovician period? A. They were more drastic than those associated with other radiations B. They may have created conditions favorable to the evolution of many new life-forms C. They may have caused the extinction of many of the marine species living in shallow waters D. They may have been a factor in the development of new species adapted to living both on land and in water E. They hastened the formation of the extensive dry regions found in the western united states
答案是4-C, 5-E 4.为什么4的B不对？ 文中不就是说了Radiation这个现象，然后探讨是哪些factor影响了Radiation嘛？C没有顾及到全文的最后一句话意思啊 5.为什么B不对呢？ 文中说Geological changes --> enriched pattern of habitat and nutrients --> Ordovician Radiation，而Radiation根据文章前一部分
的描述 - -> existing life-forms gave rise to variations that would eventually evolve into entirely new species Q4:
The passage is primarily concerned with A. evaluating the evidence of a major geologic period and determining its duration B. describing an evolutionary phenomenon and speculating about its cause C. explaining the mechanisms through which marine life-forms evolved during a particular period D. analyzing the impact on later life-forms of an important evolutionary development E. contrasting a period of evolutionary change with other such periods --------------------------------------------------------------- Q5.
Which of the following can be inferred from the passage regarding the geologic changes that occurred during Ordovician period? A. They were more drastic than those associated with other radiations B. They may have created conditions favorable to the evolution of many new life-forms C. They may have caused the extinction of many of the marine species living in shallow waters D. They may have been a factor in the development of new species adapted to living both on land and in water E. They hastened the formation of the extensive dry regions found in the western united states
答案是4-C, 5-E 4.为什么4的B不对？ 文中不就是说了Radiation这个现象，然后探讨是哪些factor影响了Radiation嘛？C没有顾及到全文的最后一句话意思啊 5.为什么B不对呢？ 文中说Geological changes --> enriched pattern of habitat and nutrients --> Ordovician Radiation，而Radiation根据文章前一部分
的描述 - -> existing life-forms gave rise to variations that would eventually evolve into entirely new species | 
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发表于 2008-7-9 14:03:00
