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The passage is chiefly about ______. The deep-sea listening system makes use of______.
The passage is chiefly about ______. The deep-sea listening system makes use of______.
admin
2009-03-16
64
问题
The passage is chiefly about ______.
The deep-sea listening system makes use of______.
选项
A、the sophisticated technology of focusing sounds under water
B、the capability of sound to travel at high speed
C、the unique property of layers of ocean water in transmitting sound
D、low-frequency sounds traveling across different layers of water
答案
C
解析
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本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
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公共英语四级笔试
公共英语(PETS)
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