2017托福100篇阅读理解试题（十四）_第4页

　　6. All of the following are mentioned as being important parts of a general theory of diversity EXCEPT

　　(A) differences between temperate and tropical zones

　　(B) patterns of distribution of species in each region

　　(C) migration among temperate and tropical zones

　　(D) variation of patterns of distribution of species among different animals and plants

　　7. The author mentions tropical Asia in lines 19 as an example of a location where

　　(A) butterfly behavior varies with climate

　　(B) a general theory of butterfly diversity has not yet been firmly established

　　(C) butterflies are affected by human populations

　　(D) documenting plant species is more difficult than documenting butterfly species

　　8. Which of the following is NOT well understood by biologists?

　　(A) European butterfly habitats

　　(B) Differences in species richness between temperate and tropical regions

　　(C) Differences in species richness within a temperate or a tropical region

　　(D) Comparisons of behavior patterns of butterflies and certain animal groups

　　9. The word "generated" in line 26 is closest in meaning to

　　(A) requested

　　(B) caused

　　(C) assisted

　　(D) estimated

　　参考答案：DABCC CBCB