问题：
[单选题]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
参考答案：
C
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- ● A peron a foreign language mut be able to ue the foreign language all hi own.
- ● A record of the type and trength of teel ued on a hip mut be included in the（）.
- ● The helicopter deck of a hip mut be marked with the unit identification，appropriate aiming circle，and a continuou line on the perimeter which i（）.
- ● Any peron maintaining a litening watch on a bridge to bridge radio-telephone mut be able to（）.
- ● Any peron maintaining a litening watch on a bridge-to-bridge radiotelephone mut be able to（）.
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- ● The litter on a hip mut be able to（）.
- ● A hip required to carry an Oil Record Book mut maintain the book on board for（）.
- ● On a hip，firefighting equipment mut be inpected once every（）.
- ● The ignal for fire alarm on a hip mut be indicated（）.
- ● You have a cutom button, with hould have a Property "IActive", one mut be able to bind thi Property on a cla Property.（）
