31.正常足月兒的胎心率約多少?
(A)80~110 bpm
(B)120~160 bpm
(C)170~200 bpm
(D)210~240 bpm
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統計: A(0), B(26), C(0), D(0), E(0) #1151920
統計: A(0), B(26), C(0), D(0), E(0) #1151920