Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.<br>A:vomiting<br>B:blue color and lack of breathing<br>C:irregular breathing<br>D:unconsciousness

Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.
A:vomiting
B:blue color and lack of breathing
C:irregular breathing
D:unconsciousness

出自：海船船员证

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