问题 单项选择题

某患者,右上中切牙牙冠3/4缺损,无叩痛,无松动,牙龈无红肿,X线示该牙已经过完善的根管治疗,根尖无阴影。最适合的治疗方案是

A.嵌体
B.3/4冠
C.开面冠
D.桩核+全冠
E.全冠

答案

参考答案:D

解析:该患者中切牙牙冠缺损过大,又已经过完善的根管治疗,最适合的治疗方案是先行桩核修复,再在桩核上全冠修复。

阅读理解

阅读理解。

     Americans like to travel on vacations.  Today  more  and  more  travellers  in  the  United States are

spending nights at small houses or inns instead of hotels. They get a room for the night and the breakfast

for the next morning.

     Rooms  for  the  night  in  private  homes  with  breakfast  places have become popular in the United

States.   Many  of   these  America's  bed - and - breakfast  places  are  old  historic  buildings.    Some

bed - and - breakfast  inns  have only  a  few rooms.  Others are much larger. Some inns do not provide

telephones or televisions in the rooms while others do.

     Staying at a bed-and-breakfast inn is much different from staying at a hotel. Usually the cost is much

less. Staying at an inn is almost like visiting someone's home.  The owners are glad to tell about the area

and the interesting places to visit. Many vacationists say they enjoy the chance to meet local families.

1. Americans like ________ on their vacations every year.

A. to stay at home  

B. to travel  

C. to sleep on the sleep

D. watch TV

2. More and more travellers in the USA like spending nights _______. 

A. at hotels  

B. at small houses or inns  

C. in their cars  

D. in the open air

3. The bed-and-breakfast places have been popular in the USA _______ .

A. for five years    

B. for one year    

C. for ten years  

D. for a few years

4. Which of the followings is NOT true according to the passage?

A. Many America's bed-and-breakfast inns are old buildings.

B. Some bed-and-breakfast inns in the USA are small.

C. All bed-and-breakfast inns don't provide televisions or telephones.

D. The owners only provide a morning meal for the travellers.

5. Why do American travelers like staying at bed-and-breakfast inns? Because _________.

A. these inns are cheap  

B. these inns are small but quiet

C. they can meet and talk with the local people

D. Both A and C  

问答题 简答题