袋底位于牙槽嵴冠方的牙周袋为 A.龈袋 B.骨上袋 C.骨下袋 D.复合袋 E.复杂 发布时间:2017-07-02 06:15 │ 来源:www.tikuol.com 题型:单项选择题 问题: 袋底位于牙槽嵴冠方的牙周袋为A.龈袋B.骨上袋C.骨下袋D.复合袋E.复杂袋
题型:单项选择题 Please remain ___ untill the plane has come to a complete stop.[ ]A. to seat B. to be seated C. seating D. seated 查看答案