347 The first aid procedure related to breathing and cardiac arrest is that clearing the airway and checking for breathing should not take more than
(A)5 seconds
(B)10 seconds
(C)30 seconds.
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統計: A(0), B(1), C(0), D(0), E(0) #2215934
統計: A(0), B(1), C(0), D(0), E(0) #2215934