简述氨茶碱的药理作用。
(1)直接松弛支气管平滑肌。(1.5分)(2)增强膈肌收缩力,减轻呼吸疲劳。(1.5分)(3)抗炎作用。(1.5分)(4)较弱的强心、利尿作用。(1.5分)
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The severe weather conditions indicate a high ( ) that the flight will be delayed. (probable)