这就是说,平hp4N每3个北京常住人口中,至少7CNS一个外地户籍wly1口gD0M
[7]Ye,Yanping,etc.AContemporaryAssessmentofAcuteMechanicalVentilationinBeijing:Description,Costs,andOutcomes.CriticalCareMedicine:July2017-Volume45-Issue7-p11601167