用力肺活量()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
肺功能示:1秒钟用力呼气容积占用力肺活量比值<60%,最大通气量低于预计值的80%;残气容积增加,残气容积占肺总量的百分比>40%。
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