What type of fire detectors is the first to go of in case of a fire?

题库:船长 类型:最佳选择题 时间:2019-02-14 17:22:46 免费下载:《甲类船长英语考证》Word试卷

What type of fire detectors is the first to go of in case of a fire?
A.Smoke detectors
B.Flame detectors
C.Heat detectors
D.Gas detectors

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