|
阅读下面的文章： Human diseases can be classified according to their effect and duration. An acute disease is an illness such as measles, influenza, or typhoid fever, from which the victim either recovers or dies in a relatively short time. Many acute diseases are also transmissible, which means they are caused by living organisms such as bacteria and viruses and can be spread from one person to another by air, water, or food. Chronic diseases, on the other hand, develop slowly and last for a long time, sometimes for a lifeti玎1e. Examples include cardiovascular disorders, most cancers, diabetes， emphysema, alcoholism, and malnutrition. Although a chronic disease may go into remission, it may flare up periodically (malaria), become progressively worse (cancers and cardiovascular disorders), or disappear with age (childhood asthma). One hundred years ago, two of the major causes of death in North America were epidemics ofinfluenza and intestinal infections-short-term acute diseases that struck young and old alike and ran quickly through the population. In contrast, the leading causes of death today are chronic illnesses, the types of heart disease and cancer that take a long tirue to develop and get progressively worse. 这篇文章将两种类型的疾病进行对比：急性病和慢性病。把下面的句子填人与其对应的两栏内。 They take a long time to develop. The victim recovers or dies quickly. They are major causes of death today. Measles and influenza are examples. They run quickly through a population The victim gets progressively worse.
|
