垂体中的神经垂体和腺垂体分别起源于()A.口腔上皮、神经组织 B.内胚层、外胚层 C 发布时间:2017-07-02 10:31 │ 来源:www.tikuol.com 题型:单项选择题 问题: 垂体中的神经垂体和腺垂体分别起源于()A.口腔上皮、神经组织B.内胚层、外胚层C.血管上皮、神经组织D.神经组织、口腔上皮
题型:单项选择题 At the beginning of class, the raise of desks could be heard outside the classroom. [ ]A. opened and closed B. to be opened and closed C. being opened and closed D. to open and close 查看答案