零基础4 unit 3.ppt

AIDS-Acquired Immune Deficiency Syndrome The World Health Organization (WHO) says as many as 10 million persons worldwide may have the virus(病毒) that causes AIDS. AIDS is a life-threatening sickness that attacks the body s natural defense system against diseases. It can destroy the bodys ability to protect itself. The patient has little ability to fight off many other diseases-including pneumonia,cancer, blindness and mental disorders. At present, there is no cure for AIDS and no vaccine(疫苗) medicine to prevent it. The AIDS virus is carried in a persons body fluids. The virus can be passed sexually or by sharing instruments used to take intravenous(静脉内的) drugs. It also can be passed in blood products or from a pregnant woman with AIDS to her developing baby. Many stories about the spread of AIDS are false. You cannot get AIDS by working or attending school with someone who has the disease. You cannot get it by touching, drinking glasses or other objects used by such persons. Experts say no one has gotten AIDS by living with, caring for or touching an AIDS patient. There are several warning signs of an AIDS infection. They include always feeling tired, unexplained weight loss and the uncontrolled expulsion of body wastes(大小便失禁). Other warnings are the appearance of white areas on the mouth, dark red areas of skin that do not disappear and a higher body temperature than normal. However, that you have one or more of these conditions does not mean you have AIDS. Always go to a doctor or health centre for a complete examination. The doctor may give you an AIDS blood test. Doctors say it will be many years before scientists develop effective treatments for AIDS. Until then, health experts say, the best immediate way to deal with the problem is through education and prevention. compete protect digest produce oppress prevent destroy creat 1. It was reported that the earthquake caused the total __________ of the small mountain village . 2. Under the governmen