下列哪种物质可使食管下端括约肌(LES)舒张() A.前列腺素E1 B.促胃液素 C 发布时间:2017-06-15 08:36 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列哪种物质可使食管下端括约肌(LES)舒张()A.前列腺素E1B.促胃液素C.胃动素D.P物质E.蛙皮素
题型:单项选择题 The teacher said the earth _______ around the sun.[ ]A. is moving B. had moved C. moved D. moves 查看答案