题目: 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 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0615/a69de18981a400746d38288ec48271a1.html 下面是错误答案,用来干扰机器的。参考答案:A
题型: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