问题 单项选择题 A1型题

患牙调方法的注意事项如下,除外()

A.正中和非正中均有创伤,应先调正中

B.保持牙齿的生理外形和牙尖切割功能

C.保持正中时正常的颌间垂直距离

D.调磨时应注意不断滴水冷却

E.一次应多调磨几个牙

答案

参考答案:E

解析:

①调应在有水冷却的条件下进行,砂石轮的转速不宜过高,应间断磨改,避免产热刺激牙髓;②一般应先磨改正中位的早接触点,且对功能性牙尖的磨改一定要慎重;③一次不应磨牙太多,应边磨改边检查,以防止出现新的早接触点或不平衡;④磨改后观察数天进行复查,检查上次磨改效果,在此基础上决定是否需要再磨。故选E。

填空题
阅读理解

阅读理解。

     Have you ever been to the beautiful country of Holland and its capital Amsterdam? Anyone

who has traveled to Amsterdam would probably agree on one thing: Amsterdam's story is a tale

of two cities-one during the day and a completely different one at night.

     During the day, the largest city in the Netherlands sits quietly on the Amstel River.You can

rent a bicycle, visit the Van Gogh or Anne Frank museum, or take a water taxi.But when the sun

goes down, the partying begins.In the big clubs and in coffee shops, tourists gather to hang out,

talk politics and smoke.

Several areas of the city clearly show the two worlds that rule Amsterdam.And they're all within

a short cab ride of each other.For example, Dam Square attracts daytime sightseers to its festivals,

open markets, concerts and other events.Several beautiful and very popular hotels can be found

there.And there's the Royal Palace and the Magna Plaza shopping mall.

     But at night party-seekers come to the square.Hip hop or funk music is heard there.So if you

come, be ready to dance.The clubs don't shut down until 4 am.

     And while you're there, check out the various inexpensive ways to tour the city.Don't worry

about getting lost.Although Dutch is the official language, most people in Amsterdam speak English

and are happy to help you with directions.And you'll notice that half the people in the streets are

on bicycles they rent.

     Amsterdam also has a well-planned canal system.For about 10 dollars, you can use the canal

bus or a water taxi to cruise(巡游) the "Venice of the North".

     The city has a historic past.One impressive place to visit is the Anne Frank House on Nine

Streets.It was there that the young Jewish girl wrote her famous diary during World War II.Visitors

can view Anne's original diary and climb behind the bookcase to the room where she and her family

hid from the Nazis for two years.

1. What means of transport is not available to visitors in Amsterdam?

A. A carriage.  

B. A bicycle.  

C. A canal bus.

D. A water taxi.

2. When getting lost, a visitor can ask natives for directions in  ___________     .

A. only Dutch    

B. Dutch or English

C. only English     

D. Spanish and English

3. What can you learn about by visiting the Anne Frank House?

A. The experience of a beautiful girl survivor.

B. The glorious past of Amsterdam.

C. The life of Jewish during World War ?.

D. The suffering of the Dutch in wars.

4. The passage is intended to  ____________         .

A. call up people's memories of World War ?

B. tell readers what A Tale of Two Cities is about

C. instruct visitors what to do and see in Holland

D. offer readers some information about Amsterdam