呼吸道高反应性(AHR)
指气道对各种刺激因子出现的过强或过早的敏感性增高反应称为AHR,其气道炎症是其产生吸道高反应性的基础。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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