问题 单项选择题 A1/A2型题

患者,男性,32岁,近几个月以来感左上后牙轻度松动,咬合不适,无明显疼痛。检查:面不均匀磨耗,左上6松动Ⅰ度,牙周探诊深度为3mm,探及少许龈下结石,X线片示近远中牙周韧带增宽,未见牙槽骨吸收。造成患牙松动的最可能原因为()。

A.牙周炎

B.外伤

C.急性龈炎

D.创伤

E.牙周韧带的急性炎症

答案

参考答案:D

判断题
阅读理解

The United States became a rich industrial nation toward the end of 1800s. There were more goods, more services, more jobs, and a higher standard of living. There was more of everything, including problems. One problem was monopoly, that is, to be the only seller of a certain line of products or a service. In some cases, several companies that manufactured the same product would agree not to compete with one another. They would all agree to charge the same price. These arrangements made it impossible for customers to shop around for lower prices for certain products.

Some people decided that huge corporations had too much power and controlled too many markets. Because of their wealth and power, they could see to it that governments passed laws favorable to them. Many people believed that monopoly and price fixing were bad for customers and bad for the country so that they should be broken up.

Finally the national government and some states passed laws that placed limits on corporations and big companies. These laws made it illegal for companies to make agreements to charge only a certain price. Later on the national government forced monopoly to be broken up.

Such laws and government action didn’t entirely do away with monopolies. Nor did they stop the growth of huge corporations. But they did show that American people had decided that some of the changes that had occurred were harmful. (from www.nmet168.com)

1. The underlined word “monopoly” in the first paragraph most probably means ________.

A. the production of certain kinds of goods  B. complete control and possession of trade

C. a big corporation of company            D. an agreement on prices

2. Because of the agreements between big companies ________.

A. people had to buy things at certain shops  B. the prices of their goods were much lower

C. customers had no choice but to buy      D. there were fewer markets in some states

3. According to the laws, companies ________.

A. were not allowed to control the markets

B. could not force the customers to buy their products

C. should have fixed prices for their products

D. must produce the same kind of goods for the same markets

4. Which of the following is not true according to the passage?

A. Big companies could not influence the government.

B. A large number of markets were controlled by big companies.

C. Many Americans were worried about the changes in their country.

D. Some of the laws were in favor of customers.