单项选择题

A．At about 6:30 a.m.
B．At about 9:30 a.m.
C．At about 11:00—12:00 a.m.
D．At about 12:30 p.m.
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单项选择题
A．Do artificial respiration as soon as possible if the person has stopped breathing.B．Act immediately to stop the flow of blood if the person is bleeding badly.C．Loosen his clothing if the person is unconscious.D．Perform the operation as soon as possible.
A．Do artificial respiration as soon as possible if the person has stopped breathing.
B．Act immediately to stop the flow of blood if the person is bleeding badly.
C．Loosen his clothing if the person is unconscious.
D．Perform the operation as soon as possible.
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