制作可摘局部义齿印模,选择的托盘与牙弓内外侧应有() A.1~2mm间隙 B.2~3 发布时间:2017-05-25 18:13 │ 来源:www.tikuol.com 题型:单项选择题 A1/A2型题 问题: 制作可摘局部义齿印模,选择的托盘与牙弓内外侧应有()A.1~2mm间隙B.2~3mm间隙C.3~4mm间隙D.5mm间隙E.无间隙
题型:单项选择题 A1/A2型题 All passengers________are expected to fasten the seat belts when the plane takes off or lands.[ ]A. on the board B. on boardC. on boards D. on a board 查看答案