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The necessity for administering artificial(人工的) respiration may be recognized by the victim's ______.A.vomiting(呕吐)B.blue color and lack of breathingC.irregular breathingD.unconscious(无意识的) condition

题目

The necessity for administering artificial(人工的) respiration may be recognized by the victim's ______.

A.vomiting(呕吐)

B.blue color and lack of breathing

C.irregular breathing

D.unconscious(无意识的) condition

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