A.食管下括約肌長(zhǎng)4~5cm B.食管下括約肌靜息壓為15~35mmHg C.食管繼發(fā)性推進(jìn)蠕動(dòng)由吞咽動(dòng)作引發(fā) D.正常吞咽時(shí)食管下括約肌松弛時(shí)間<8s E.縮膽囊素可使食管下括約肌壓力升高