2. 外语
  3. Crew chiefs supervised engines, switches and lights that told them how each item of equipment was functioning.

Crew chiefs supervised engines, switches and lights that told them how each item of equipment was functioning.

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问题 Crew chiefs supervised engines, switches and lights that told them how each item of equipment was functioning.
选项 A、observed
B、preserved
C、monitored
D、nurtured
答案C
解析 本题中，supervised的意思是“监督，管理，指导”。四个选项中，monitored的意思是“监控”，如：a television wave form monitor(电视波形监视器)。observed的意思是“观察，遵守”；preserved的意思是“保护，保持”；nurtured的意思是“养育，教养”。只有C符合题意。
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