下颌全口义齿的后缘盖过 A．翼上颌切迹 B．翼缘区 C．后堤区 D．磨 发布时间：2017-07-22 14:19 │ 来源：www.tikuol.com 题型：单项选择题 问题： 下颌全口义齿的后缘盖过A．翼上颌切迹 B．翼缘区 C．后堤区 D．磨牙后垫的1/3～1/2 E．软硬腭交界处稍后的软腭上
题型：单项选择题 造纸术不仅是中国古代的伟大发明，同时也促进了世界文明的发展。请根据下面表格里所提示的内容，以One of the Most Helpful Inventions为题写一篇短文。词数60-80之间。InventionPaperTimeWestern Han dynastyInventorCai LunMaterialsbark, ropes, rags and so onUseswriting, painting, printing books and so onOne of the Most Helpful Inventions______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 查看答案