2. 外语
  3. To reduce car crash rate, many scientists are working hard to Satellite tracking and remote communication systems can be used t

To reduce car crash rate, many scientists are working hard to Satellite tracking and remote communication systems can be used t

admin2009-01-21  45
问题 To reduce car crash rate, many scientists are working hard to
Satellite tracking and remote communication systems can be used to
选项 A、reduce oil consumption.
B、remove the obstacles on the road.
C、call for help when one’s car crashes.
D、help drivers get out of a traffic jam.
答案C
解析
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