On a ship，a fixed carbon dioxide or other approved system must be installed（）.<br>A:where oil or chemical drums are stored<br>B:in all battery storage locations<br>C:in paint lockers<br>D:in all of the above locations

On a ship，a fixed carbon dioxide or other approved system must be installed（）.
A:where oil or chemical drums are stored
B:in all battery storage locations
C:in paint lockers
D:in all of the above locations

出自：海船船员证

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