74.下列何者是良好的支氣管擴張劑？
(A)β1-adrenergic agonists
(B)β2-adrenergic agonists
(C)α1-adrenergic agonists
(D)α2-adrenergic agonists

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統計： A(13), B(276), C(1), D(2), E(0) #1384570