问题 单项选择题

某医院口腔科在街道对社区老年人进行牙周病流行病学调查,以社区牙周指数(CPI)为标准,一男性老年人的个人计分为2,表明这位老年人()。

A.牙龈健康

B.牙龈炎,探诊有出血

C.有牙石

D.早期牙周病,牙周袋4~6mm

E.晚期牙周病,牙周袋>6mm

答案

参考答案:C

解析:社区牙周指数的计分0代表牙龈健康,1代表龈炎,2代表有牙石,3代表有早期牙周病,4代表晚期牙周病。该老年人的计分为2,应选择的正确答案是C。

阅读理解

阅读理解。

     How do you pay for things? Do you usually use cash (现金), or do you like to pay by credit card (信用卡)? If you are like a lot of people, you probably have at least one credit card. Also, you might use it more often than you probably should.

     Credit cards first became popular in the 1920s, At that time, businesses, such as hotels and companies,

gave credit cards to their best customers (顾客). Unlike today's credit cards, customers could only use these

cards at the Store or business that gave out the card. Customers had to pay for things in full. They couldn't pay

for something a little at a time.

     In 1950, a businessman named McNamara started a credit card company - Diners Club. Unlike earlier

credit cards, this card could be used by customers at many restaurants. Customers liked the card because they

didn't have to carry a lot of cash with them. Restaurant owners liked the card, too. Why? They found out that

customers usually spent more money when they could pay by credit card.

     In its first year of business, Diners Club issued 200 cards, The customers who got the cards from the

Diners Club could use them at 27 different restaurants. Today, Diners Club has about 8 million customers,

and they can use their cards in over 7. 6 million businesses in more than 200 countries.

1. What can we know about the earlier credit cards from the passage?

A. They could be used everywhere.

B. Customers had to pay for things in full.

C. They were very popular before the 1920s.

D. Everyone could get this kind of credit card.

2. The underlined word "issued" here probably means "______".

A. showed

B. took

C. borrowed

D. provided

3. This passage is mainly about ______.

A. part of the development of credit cards

B. how to use cash

C. the number of people who use credit cards in the world

D. how credit cards help businessmen

单项选择题