胃内滞留型制剂应具有哪些特征?如何设计该类制剂的处方? 发布时间:2017-09-22 04:03 │ 来源:www.tikuol.com 题型:问答题 问题: 胃内滞留型制剂应具有哪些特征?如何设计该类制剂的处方?
题型:问答题 The secretary worked late into night, _____ a long speech for the president. [ ]A. to prepare B. preparing C. prepared D. was preparing 查看答案