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

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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
*
选项
答案B
解析
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