考研听力基本功4 Passage2
时间：2018-12-04 作者：英语课 分类：考研英语听力基本功4
AIDS represents a different type of challenge to business firms when dealing 1 with consequences of this terrible diseas
[00:08.18]AIDS is a fatal disease that breaks down the body's ability to defend itself against illness and infectio
[00:16.95]AIDS is especially dangerous because a long time(typically five years) elapses between someone's first exposure to the AIDS viru
[00:26.88]and actual development of the diseas
[00:30.07]During this period,people may not show any symptoms of AID
[00:34.95]and they probably don't even know they have i
[00:38.19]but they are still carriers who can give the disease to other
[00:43.28]This large pool of unknown carriers accounts for the rapid spread of the diseas
[00:49.53]In 1982,only 1 013 cases of AIDS were reported;today the victims number over 200 000.