A-A+
It is believed that efforts at resuscitation a
问题详情
It is believed that efforts at resuscitation are useless when ______.
A．artificial respiration and massage of the heart have yielded no obvious result
B．a person"s heartbeat and breath have totally stopped
C．standard methods of resuscitation have failed
D．the brain is certainly dead
参考答案
正确答案：D
解析：正确答案D 符合原文第三段的最后两句"Artificial respiration…resuscitation，are continued until it is clear that the brain is dead．Most physicians consider that beyond this point efforts at resuscitation are useless．”。而其他选项与原文不符。
