题目内容（请给出正确答案）

[主观题]

One of the signals, other than a distress signal, that can be used by a rescue boat to att

ract attention is a/an ______.

A.red star shell

B.searchlight

C.burning barrel

D.orange smoke signal

提问人：网友cocolwang 发布时间：2022-01-06

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