为防止可摘局部义齿下沉,刺激牙龈组织,在可摘局部义齿的设计中,不宜单独使用
A.间隙卡环
B.环形卡环
C.固定卡环
D.双臂卡环
E.对半卡环
参考答案:D
用所给动词的适当形式填空。
1. My sister _____________ (go) to the supermarket every Sunday.
2. We _____________ (do not) watch TV last night.
3. Listen! The girl in the next room _____________ (sing) an English song.
4. _____________ he _____________ (jump) higher than David?
5. He _____________ (like) _____________ (drink) tea. How he would like _____________ (drink) a cup
of tea.
6. What about _____________ (read) some newspaper? Sorry, I don't have time _____________ (read) it.
薄质防水涂料施工为了防止收头部位出现翘边现象,所有收头均应用密封材料封边,封边宽度不得小于( )mm。
A.3B.5C.10D.12