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.

admin2010-02-21  87
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 supervise监督，管理，指导；observe观察，遵守；preserve保护，保持；monitor监控；nurture养育，教养。
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