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问题 单项选择题

全冠修复中不可能对牙髓造成危害的因素是

A．牙体预备产热
B．磨牙过多
C．消毒剂
D．取印模
E．戴暂时冠

答案

参考答案：E

解析：全冠修复过程中对牙髓造成的损害的原因包括温度刺激、化学刺激等。其中牙体预备、制取印模可导致对牙髓冷热湿度刺激，消毒中用的消毒即可对牙髓造成化学刺激。而戴暂时冠可隔绝对牙髓的各种刺激，对牙髓有保护作用。

阅读理解
阅读理解。
                                                           New Zealand
                    What can you see?
     Mountains, volcanoes, rivers, lakes,
waterfalls, forests, beaches. Both islands
are mountainous. In fact, only 30% of
New Zealand is flat.




                         The Maoris
     When the Maoris first arrived in New
Zealand, they lived in villages and were
excellent fishermen, hunters and farmers.
About 50 years ago many Maoris started to
live and work in the large cities and took jobs
in government, industries, medicine and
education. They are proud of their culture
and are determined to keep many of the
customs which are part of their way of life.
                    Who can you meet?
     Most people live on North Island.
Eighty-five percent of New Zealanders are
"pakeha" ("white people"), which means
their "great grandfathers" came from Europe.
Ten percent are Maoris. The Maoris came
to New Zealand from the Polynesian islands
probably around the tenth century. The
"pakeha" started to arrive in New Zealand
from Europe about 200 years ago as farmers
and businessmen.		                  Fact box: New Zealand
     Position: South of the Equator (赤道);
nearest neighbor. Australia, 1 600 km away.
     Size: Two main islands-North Island
and South Island: together they are 268 680
km2. 
     Population: 4 million
     Capital: Wellington
     Languages: English and Maori

1. When did the white people begin to live in New Zealand?
A. About 50 years ago.
B. About 85 years ago.
C. About 200 years ago.
D. About 1 000 years ago.
2. The country's population is mainly made up of _____.
A. the white people and the Polynesians
B. the Maoris and the white people
C. the white people and the "pakeha"
D. the Maoris and the Polynesians
3. Maoris started to live in the large cities because _____.
A. they got jobs there
B. they were tired of life in villages
C. they lost their houses
D. they wanted to live as the white people
4. What do the Maoris value most in life?
A. Living in small villages.
B. Developing farming skills.
C. Keeping their own culture.
D. Taking up government jobs.
5. Which of the following is a fact about New Zealand?
A. 4 million white people.
B. Over 1/3 of the country being flat.
C. About 1 600 km south of the Equator.
D. Ten percent of the population being Maoris.
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单项选择题

(10) 是指一个软件模块是否容易修改、更新和扩展。

A．可移植性

B．可维护性

C．可重用性

D．可扩充性
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