2. 外语
  3. A Study of Sound B Highway Police C Working Principles D Early Use of "Radar" E Useful Tools F Discovery by Chance A detec

A Study of Sound B Highway Police C Working Principles D Early Use of "Radar" E Useful Tools F Discovery by Chance A detec

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问题 A Study of Sound
B Highway Police
C Working Principles
D Early Use of "Radar"
E Useful Tools
F Discovery by Chance
A detect nearby objects
B determine the depth of the ocean water
C decide how fast you drive
D stop passing ships
E map the ocean floor
F observe water flow
选项
答案E
解析
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