Which is TRUE concerning immersion suits and their use?（）<br>A:Only a light layer of clothing may be worn underneath<br>B:They provide sufficient flotation to do away with the necessity of wearing a life jacket<br>C:They should be tight fitting<br>D:A puncture in the suit will not appreciably reduce its value

Which is TRUE concerning immersion suits and their use?（）
A:Only a light layer of clothing may be worn underneath
B:They provide sufficient flotation to do away with the necessity of wearing a life jacket
C:They should be tight fitting
D:A puncture in the suit will not appreciably reduce its value

出自：海船船员证

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