12) A 68-year old male patient has a history of long-term heavy smoking for more than 30 years, a history of chronic bronchitis for 17 years, and dyspnea with progressive aggravation in the past 3...

12) A 68-year old male patient has a history of long-term heavy smoking for more than 30 years, a history of chronic bronchitis for 17 years, and dyspnea with progressive aggravation in the past 3 years. Chest x-ray examination showed:The brightness of lung field increased, and the vascular texture around lung field decreased and became fine The patient's lung function test results are most likely to be() AFEV1/FVC40% BFEV1/FVC75%,RV/TLC75%,RV/TLC>40% E RV/TLC>40%,FEV1 accounted for 90% of the estimate