A. Scientists do not know exactly why Hepatitis develops. B. Hepatitis A often breaks out in filthy places where food and wa

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问题 A. Scientists do not know exactly why Hepatitis develops.   
B. Hepatitis A often breaks out in filthy places where food and water are easily contaminated.   
C. Symptoms of hepatitis include languor, loss of appetite, distress of the stomach, and yellowness of urine.   
D. Hepatitis B is the best-known form of viral hepatitis.     
E. The chronic hepatitis lasts a long time and is most likely to recur.   
F. People should pay attention to public environment for the preservation of health.  
A. injury or infection   
B. viruses or misuse of alcohol and drug   
C. poor hygiene and contaminated water   
D. exposure to infected blood     
E. the liver is not working properly   
F. mild, vague symptoms of fatigue and poor appetite

选项

答案B

解析 见第一段“The disease has many causes,including misuse of alcohol and drugs,but viruses are the most common cause.”此疾病有多种原因,包括过量饮酒或服药,但是最常见的原因是病毒。
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