图5-
抽一根烟对呼出的影响农用地trations of carbon monoxide (CO) and nitric oxide (NO) in eight healthy, nonsmoking subjects. Measurements performed 1, 10 and 30 min after smoking the cigarette, with a 15‐s breath-hold before exhalation. a) CO concentrations in parts per million (ppm) as registered by the fast-response nondisperse infrared analyser at exhalation flow rate 0.15 L·s-1,b)具有未知流速的电化学传感器。c)在呼气流量为0.15 l·s时,无浓度为十亿(PPB)(PPB)-1。**:p <0.01。