73.居家型呼吸器（PLV-100）設定及調整吐氣末正壓（PEEP）的機制為何？
(A)threshold resistor valve
(B)flow resistor valve
(C)mushroom/diaphragm valve
(D)scissors valve

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統計： A(69), B(9), C(25), D(2), E(0) #1057268