16.Which of the flowing sites is the most common of chronic gastric ulcer?() pyloric antrum b.pyloric antrum and lesser curvature c.lesser curvature d.greater curvature e.fundic 17.Which one of the listed is the most common complication of chronic peptic ulcer？( a.hemorrhage b.perforation c.pyloric stenosis malignant transformation e.hypertrophic gastritis 18.The most serious complication of chronic peptic ulcer is ( a.hemorrhage perforation pyloric stenosis d.malignant transformation e.hypertrophic gastritis 19.Which one of the listed is the most common pathological type of early gastric carcinoma? a.protruded type,I type b.superficial elevated type,IIa type c. superficial flat type,IIb type superficial depr ssed type,Ile typ e excavated type,III type 20.A factor that stimulates the proliferation of smooth-muscle cells and also relates to the pathogenesis of atherosclerosis is( a.Platelet-derived growth factor gro wth factor B &1necd Interleukin e.Tumor necrosis factor 21.The most characteristic and frequent feature of chronic rheumatic heart disease is the d opm int of a.Vegetations on the endocardium b.Ashoff bodies within the myocardium c.Fibrin deposits within the pericardium d.Stenosis of the mitral valve16. Which of the flowing sites is the most common of chronic gastric ulcer? ( ) a. pyloric antrum b. pyloric antrum and lesser curvature c. lesser curvature d. greater curvature e. fundic 17. Which one of the listed is the most common complication of chronic peptic ulcer? ( ) a. hemorrhage b. perforation c. pyloric stenosis d. malignant transformation e. hypertrophic gastritis 18. The most serious complication of chronic peptic ulcer is ( ) a. hemorrhage b. perforation c. pyloric stenosis d. malignant transformation e. hypertrophic gastritis 19. Which one of the listed is the most common pathological type of early gastric carcinoma? ( ) a. protruded type, I type b. superficial elevated type, IIa type c. superficial flat type, IIb type d. superficial depressed type, IIc type e. excavated type, III type 20. A factor that stimulates the proliferation of smooth-muscle cells and also relates to the pathogenesis of atherosclerosis is ( ) a. Platelet-derived growth factor b. Transforming growth factor β c. Interleukin 1 d. Interferon α e. Tumor necrosis factor 21. The most characteristic and frequent feature of chronic rheumatic heart disease is the development of ( ) a. Vegetations on the endocardium b. Ashoff bodies within the myocardium c. Fibrin deposits within the pericardium d. Stenosis of the mitral valve