维生素C注射液中加入依地酸二钠的目的是 （） A.降低介电常数使注射液稳定 B.防止药物

A、programmed learning

B、understudy method

C、special assignments

D、job rotation

Passage 2

Questions 6 to 10 are based on the following passage:

On-the-job smoking is a hot issue for both smokers and non-smokers, and many managers now see smoking as a productivity problem. Although some people question whether smoking really affects one’s productivity, it has, in fact, been proven that a smoker costs a company more than a non-smoker. According to Professor William Weis, a smoking employee costs his or her employer about $ 5,700 more a year than a never-smoker. These costs include medical care, lost earnings and insurance. And absence due to smoking breaks is one of the productivity problems, yet it accounts for a great deal of employer costs.

(78) When the issue of smoking at the workplace is discussed, perhaps the most important problem is the health risk that smoking causes to both smokers and never-smokers. It has long been proven that smoking is linked to lung cancer. Now many health experts warn that passive smoking can cause lung cancer and other illnesses in healthy never-smokers. Passive smoking can be defined as exposure to second-hand tobacco smoke in enclosed areas. Anyone who has been with smokers indeed knows that their smoke can cause eye irritation, coughing, headaches and throat soreness. While eye irritation may seem a small thing to some smokers, it nevertheless is a problem that occurs every workday in offices and break-rooms and can lead to greater health problems. Employees who do not smoke should not be subjected to the risks of passive smoking and need to be able to work in a safe environment. Surgeon General Koop states that the right of the smoker stops at the point where his or her smoking increases the disease risk of those occupying the same environment.

6. All the following cases are on-the-job smoking except that____.

A an employer smokes while working in the office

B a taxi driver smokes while driving the car

C a worker smokes while working in the workshop

D a worker smokes while reading in the train

In the second part of the passage, the author suggests banning(禁止) on-the-job smoking so as to______.

A．cut down costs of medical care and insurance

B．create a healthy and safe working environment

C．prevent eye irritation from becoming a big health problem

D．improve the smoking employees' work efficiency

The following are all efforts that led to the change of attitude on smoking EXCEPT

A．rejection by the public.

B．cigarette warning labels.

C．anti-smoking campaigns.

D．anti-smoking legislation.

see smoking as a productivity(生产力) problem. Although some people question whether smoking really affects one's productivity, it has, in fact, been proven that a smoker costs a company more than a non-smoker. According to Professor William Weis, a smoking employee costs his or her employer about $5,700 more a year than a never-smoker. These costs include medical care, lost earnings and insurance. And absence due to smoking breaks is one of the productivity problems, yet it accounts for a great deal of employer costs.

(78)When the issue of smoking at the workplace is discussed, perhaps the most important problem is the health risk that smoking causes to both smokers and never-smokers. It has long been proven that smoking is linked to lung cancer. Now many health experts warn that passive smoking can cause lung cancer and other illnesses in healthy never-smokers. Passive smoking can be defined as exposure to second-hand tobacco smoke in enclosed areas. Anyone who has been with smokers indeed knows that their smoke can cause eye irritation(刺激), coughing, headaches and throat soreness. While eye irritation may seem a small thing to some smokers, it nevertheless is a problem that occurs every workday in offices and break-rooms and can lead to greater health problems. Employees who do not smoke should not be subjected(遭受) to the risks of passive smoking and need to be able to work in a safe environment. Surgeon General Koop states that the right of the smoker stops at the point where his or her smoking increases the disease risk of those occupying the same environment.

All the following cases are on-the-job smoking except that______.

A．an employer smokes while working in the office

B．a taxi driver smokes while driving the car

C．a worker smokes while working in the workshop

D．a worker smokes while reading in the train

Many managers do not seem to be in favor of on-the-job smoking mainly because it

A．reduces productivity of the company to a certain degree

B．does harm to the health of never-smokers of the company

C．affects the relationship between smokers and non-smokers

D．makes the break-rooms more crowded arid more polluted

Which of the following is NOT mentioned as a step to control smoking？

A．Forbidding smoking in all public places.

B．Collecting a special tax on cigarettes.

C．Banning cigarette advertising from radio and TV.

D．Requiring a warning on each cigarette package.

Which of the following is NOT mentioned as a step to control smoking？

A．Forbidding smoking in all public places.

B．Collecting a special tax on cigarettes.

C．Banning cigarette advertising from radio and TV.

D．Requiring a warning on each cigarette package:

Which of the following is NOT mentioned as a step to control smoking？

A．Forbidding smoking in all public places.

B．Collecting a special tax on cigarettes.

C．Banning cigarette advertising from radio and TV.

D．Requiring a warning on each cigarette package.

Many managers do not seem to be in favor of on-the-job smoking mainly because it ____.

A reduces productivity of the company to a certain degree

B does harm to the health of never-smokers of the company

C affects the relationship between smokers and non-smokers

D makes the break-rooms more crowded and more polluted