呼吸道窘迫症候群(Respiratory distress syndrome)是因新生兒體內缺乏何種物質？(1)黃體素(Progesterone)(2)睪固酮(Testosterone)(3)前列腺素(Prostaglandin)(4)表面張力素(Surfactant)
(A)(1)
(B)(2)
(C)(3)
(D)(4)

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統計： A(2), B(7), C(6), D(710), E(0) #282852