44.Metered-dose inhaler 之輔助設備 spacers 及 holding chambers 種類中，那一種設備能產出較小 的霧氣粒子？
(A)small volume spacer
(B)large volume spacer
(C)valved holding chamber
(D)non-valved holding chamber

答案：登入後查看
統計： A(12), B(6), C(128), D(4), E(0) #1052839