问题
单项选择题
Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.
A.coaming
B.alarm
C.drain
D.fire sensor
答案
参考答案：A
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Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.
A.coaming
B.alarm
C.drain
D.fire sensor
参考答案：A