23.在1大氣壓(760mmHg)下吸氣,此時咽氣管開口端之氧氣分壓最接近多少mmHg?
(A)0.25
(B)47
(C)160
(D)560
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統計: A(46), B(280), C(1335), D(313), E(0) #1635209
統計: A(46), B(280), C(1335), D(313), E(0) #1635209