问题
单项选择题
Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.
A.vomiting
B.blue color and lack of breathing
C.irregular breathing
D.unconsciousness
答案
参考答案：B
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Sign(s) of respiratory arrest requiring artificial respiration is(are)（）.
A.vomiting
B.blue color and lack of breathing
C.irregular breathing
D.unconsciousness
参考答案：B