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2011-09-14 14:58:00   来源：liuxuepaper.Com    双击单词自动翻译

　　(E) They provide an accurate account of the physiological behavior of Weddell seals during those dives in the wild in which they are either evading predators or exploring distant routes.

　　6. The author cites which of the following as characteristic of the Weddell seal’s physiological behavior during dives observed in the laboratory?

　　Ⅰ. A decrease in the rate at which the seal’s heart beats

　　Ⅱ. A constriction of the seal’s arteries

　　Ⅲ. A decrease in the levels of lactic acid in the seal’s blood

　　Ⅳ. A temporary halt in the functioning of certain organs

　　(A) Ⅰand Ⅲ only

　　(B) Ⅱ and Ⅳ only

　　(C) Ⅱ and Ⅲ only

　　(D) Ⅰ,Ⅱ, and Ⅳ only

　　(E) Ⅰ,Ⅲ, and Ⅳ only

　　7. The passage suggests that because Weddell seals are forcibly submerged during laboratory dives, they do which of the following?

　　(A) Exhibit the physiological responses that are characteristic of dives in the wild that last less than twenty minutes.

　　(B) Exhibit the physiological responses that are characteristic of the longer dives they undertake in the wild.

　　(C) Cope with oxygen deprivation less effectively than they do on typical dives in the wild.

　　(D) Produce smaller amounts of lactic acid than they do on typical dives in the wild.

　　(E) Navigate less effectively than they do on typical dives in the wild

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