问题 单项选择题

关于咬创伤,哪项是错误的()

A.创伤影响牙周炎症的扩展途径和组织破坏程度

B.创伤可引起牙周炎症

C.慢性创伤常因牙磨损、牙齿突出等因素所致

D.急性创伤常因修复体等医源性因素所致

E.继发性创伤是因牙周组织支持力不足所致

答案

参考答案:B

阅读理解

阅读理解。

     Most shops in Britain open at 9:00am, and close at 5:00 or 5:30 in the evening. Small shops usually

close for an hour at lunchtime. On one or two days a week-usually Thursday and/or Friday-some large

food shops stay open until about 8:00 pm for late night shopping.

     Many shops are closed in the afternoon on one day a week. The day is usually Wednesday or

Thursday and it is a different day in different towns.

     Nearly all shops are closed on Sundays. Newspaper shops are open in the morning, and sell sweets

and cigarettes as well. But not all the things can be sold on Sundays.

     Usually it is not difficult for foreign visitors to find where to buy things. Most shops sell the things that

you want to buy. One problem is stamps. In Britain you can only buy these at post offices. Many large

food shops are self-service. When you go into one of these shops, you take a basket and you put the

things you wish to buy into this. You pay for everything just before you leave. If anyone tries to take things from a shop without paying, they are almost certain to be caught, because most shops have detectives.

     When you are waiting to be served in a shop, it is important not try to be served before people who

arrive before you. Many foreign people are surprised at the British way of queuing (排队).

1. Most shops in Britain stay open for about ______ a day.

A. eight hours    

B. five hours    

C. ten hours    

D. six hours

2. According to the passage, which of the following statements is NOT true?

A. Some large food shops open for about 11 hours on Thursday or Friday.

B. Many shops are closed in the afternoon once a week on Tuesday.

C. Only a few things can be bought on Sundays.

D. It is not difficult for foreign visitors to buy things in Britain.

3. You can not buy ______ in shops.

A. cigarette    

B. sweets    

C. stamps    

D. clothes

4. Which of the following statements is TRUE?

A. Most shops usually close for an hour at lunchtime.

B. Many large shops are self-service.

C. Most shops have detectives.

D. People do not have to queue to be served.

5. Which of the following statements can be the best title of this passage?

A. Shops in Britain

B. How to buy things in Britain?

C. The British Way of Queuing

D. How long are the British shops?

填空题