问题 多项选择题 案例分析题

大气卫生:人通过呼吸与外界进行气体交换,从空气中吸收氧气,呼出二氧化碳,以维持生命活动。一个成年人每天呼吸2万多次,吸入10~15m3空气。因此,掌握大气污染对人体健康的影响是极其重要的,掌握大气的卫生标准与基准两者的不同,还有制订大气卫生标准的方法。

进行最大一次浓度采样应在()。

A.气象条件恶劣

B.污染源下风侧

C.工厂排放量最大

D.污染源上风侧

E.常年主导风向上风侧

答案

参考答案:A, B, C

阅读理解

In the U.S., people prefer waiting for a table to sitting with people they don’t know. This means a hostess may not seat a small group until a small table is available, even if a large one is. If you are sitting at a table with people you don’t know, it is impolite to light up a cigarette without first asking if it will disturb them.

At American restaurants and coffee shops you are usually served tap water before you order. You may find the bread and butter is free, and if you order coffee, you may get a free refill.

Most cities and towns have no rules about opening and closing time for stores or restaurants, though they usually do make rules for bars. Especially in large cities, stores may be open 24 hours a day.

Serving in restaurants is often large; too large for many people. If you can’t finish your meal but would like to enjoy the food later, ask your waitress or waiter for a “doggie bag”. It may have a picture of a dog on it, but everybody knows you’re taking the food for yourself.

Supper and dinner are both words for the evening meal. Some people have “Sunday dinner”. This is an especially big noon meal.

Tips are not usually added to the check. They are not included in the price of the meal, either. A tip of about 15% is expected and you should leave it on the table when you leave. In some restaurants, a check is brought on a plate and you put your money there. Then the waiter or waitress brings you your change.

1. Which statement is true?

A. American people like sitting with people they don’t know.

B. Tips shouldn’t be given to the waiter or waitress.

C. Orange juice is served before you order

D. American people would not light a cigarette if the people who sit at the same table mind their smoking.

2. What does the underlined word “doggie bag” mean in the article? It means ______.

A. a bag with a picture of a dog on it

B. a bag used to carry dogs

C. a small bag for taking the food left over home to enjoy it later

D. a small bag for taking the food left over home for dogs

3. Sunday dinner is _______.

A. a dinner in the evening               B. a big noon meal

C. a big lunch Sunday                  D. a supper on Sunday

单项选择题