2. 外语
  3. Complete the summary below. Choose NO MORE THAN THREE WORDS from the passage for each answer. Write your answers in boxe

Complete the summary below. Choose NO MORE THAN THREE WORDS from the passage for each answer. Write your answers in boxe

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问题     Complete the summary below.
    Choose NO MORE THAN THREE WORDS from the passage for each answer.
    Write your answers in boxes on your answer sheet.
    How the elephants sense these sound vibrations is still unknown, but O’Connell-Rodwell, a postdoctoral researcher at Stanford University, proposes that elephants are ’listening’ with their【R1】________by two kinds of nerve endings that respond to vibrations with both【R2】________frequency and slightly higher frequencies. O’Connell-Rodwell’s work is at the combination of geophysics, neurophysiology and【R3】________.
    It was known that seismic communication existed extensively within small animals, but O’Connell-Rodwell was the first person to indicate that a large land animal would send and receive【R4】________too. Also, he noticed the freezing behaviour by putting a male planthopper on a stem and play back a female call, which might prove the existence of other communicative approaches besides【R5】________.
    Scientists have determined that an elephant’s ability to communicate over long distances is essential, especially, when elephant herds are finding a【R6】________, or are warning of predators. Finally, the results of our 2002 study showed us that elephants could detect warning calls through the【R7】________.
【R3】
选项
答案ecology
解析 O’Connell-Rodwell的工作结合了地球物理学、神经生理学和什么。通过题干可判断，空白处应该也是一门学科名称。通过专有名词geophysics和neurophysiology很容易定位到第4段的最后，寻找与这两个学科并列的名词即可。因此，本题的答案为ecology。
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