The litter on a ship must be able to（）.<br>A:carry at least two injured persons<br>B:float for at least two hours<br>C:be used on the types of helicopters serving the unit<br>D:All of the above

The litter on a ship must be able to（）.
A:carry at least two injured persons
B:float for at least two hours
C:be used on the types of helicopters serving the unit
D:All of the above

出自：海船船员证

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