[简答题]S4. We have also expanded the treatment of technical articles -- recognizing the potential contribution of article writing to the career of the writer and the value of the article to science and technology.

[简答题]S4. We have also expanded the treatment of technical articles -- recognizing the potential contribution of article writing to the career of the writer and the value of the article to science and technology.

[单项选择]

For years we have believed we were either healthy or sick. (55) , during the mid-90s, scientists developed a new concept called "sub-health", a status (56) health and illness. The concept of sub-health has become (57) because it has helped to explain many health problems. (58) one study, only 5. 6% of people in the overall population are actually sick, (59) the subhealthy group consists of about 60%, and the (60) population is considered healthy. (61) of one’s sub-health will help one to be alert to the underlying disease and remain healthy. Sub-health is a state in which the body is (62) turning from health to illness or from illness to health. Our bodies are actively (63) the conditions of health, sub-health and disease. Factors (64) aging, internal or external toxicity (毒性), and body or mind exhaustion may cause sub-health, but taking good care of the body can change a sub-
A. Causes 
B. Awareness 
C. Doubts 
D. Treatment

[简答题]Industrial psychologists have also studied the effects of fatigue on workers to de-termine the length of working time that yields the greatest productivity.

[填空题]They must have also enjoyed themselves because they gave us the word "laughter".

[单项选择]______ difficulties we may have, we must finish the task as required.


A. Whatever
B. Whichever
C. Of which
D. No matter how

[单项选择]We have done things we ought not to have done and ______ undone things we ought to have done.
A. leave
B. leaving
C. left
D. will leave