2. 外语
  3. The flashing red light served as a ______ of danger ahead.

The flashing red light served as a ______ of danger ahead.

admin2011-06-29  71
问题 The flashing red light served as a ______ of danger ahead.
选项 A、predictor
B、caution
C、precaution
D、prevention
答案B
解析 A．predictor预测器，预报仪器。B．caution谨慎，警告。C．precautmn预防措施或方法。 D．prevention预防，妨碍。
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