منابع مشابه
the effect of using visual aids on the development of speech act of disagreement among iranian intermediate efl learners
abstract the present study tried to investigate the effect of visual aids (films) on the development of the speech act of disagreement among iranian efl intermediate learners. to this end, the researcher selected 40 homogeneous intermediate learners based on their scores on oxford placement test. .the subjects then divided into control group and experimental group. both classes were tested by ...
The Origin of AIDS
The Acquired Immune Deficiency Syndrome is a frightening new disease entity which has sprung, in five years, from obscurity to a major worldwide epidemic with a ^HO estimate of 35000 cases worldwide, and extrapolahons of antibody seropositivity rates suggest there to be between 1.5 and 2.5 million carriers in the USA and that 1% of the entire population of the African continent may affected. Th...
متن کاملThe impact of human immunodeficiency virus/AIDS.
As researchers, why do we study socioeconomic impact? For one, to convince people to give higher priority to AIDS prevention. We have seen time and again that policy-makers have been unwilling to commit significant human and financial resources to preventing AIDS until they are confronted with a lot of AIDS. So many places in the world, especially countries in Asia, are poised to experience a r...
متن کاملA comment on the origin of Corona virus
The new coronavirus origin is one of the important controversial subjects in the study of this virus. There are many contradictions about the epidemiological data and bat origin of the virus. In this regard heterodox view by cosmic biology concepts, exceptionally bright fireball event a few months before the outbreak in China, and extraordinary weak solar cycle with many sunspot free days could...
متن کاملThe Mysterious Origin of Human Immunodeficiency Virus
Perhaps nothing in the health sciences can raise the specter of intense debate more than the origin of the multifarious Human Immunodeficiency Virus (HIV), which has reportedly infected an estimated 40.3 million people since AIDS (Acquired Immune Deficiency Syndrome) was first described clinically in 1981. HIV is the etiological agent historically linked with fear and denial by association with...
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ژورنال
عنوان ژورنال: Nature
سال: 1986
ISSN: 0028-0836,1476-4687
DOI: 10.1038/319728a0