Send out a______signal, the ship is sinking.

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问题 Send out a______signal, the ship is sinking.

选项 A、danger
B、hazard
C、rescue
D、distress

答案D

解析 考查名词辨析。danger“危险”;rescue“营救”;hazard“危险”;distress“危难”,distress signal是固定短语.意为“遇险信号,求救信号”。故选D。
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