吸入速效β受體激動劑后15分鐘FEV增加至下列哪項(xiàng)數(shù)據(jù)時(shí)有助于診斷哮喘 ()
A.≤12% B.≤10% C.10%~12% D.≥12% E.≥10%
A.50% B.65% C.70% D.75% E.80%