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of Science, Technology & Society, v.19, n.1., p.32, 1999 (Type: article; Published: 19990201).
13. Factors associated with parents' decision to disclose their HIV diagnosis to their children., Wiener, Lori S. Sage Family Studies Abstracts, v.21, n.1, 1999 (Type: abstract; Published: 19990201).
14.
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엔진을 개발하고 실험하는데 2억 5천만달러를 들여 X-43A를 완성하였다.
이론상 이 공기 흡입 엔진은 마하 7 혹은 그 이상의 속도로 비행을 가능케 한다. 이는 불과 수 시간 내에 지구를 한바퀴 돌 수 있는 속도다. 미 국방부 또한 이런 엔진 개
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of using fossil fuels and the increased use of alternative energy. Therefore, the report firstly recommends that each country collaborate for the environment and obey international rules such as carbon trading and taxing. Also, the report recommends that each country adopt building infrastructure fo
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As the number of broadcasts about damage caused by climate change in the world is increasing, many people are concerned about climate change. Indeed, most people agree not only that the main cause of climate change is using fossil fuels which lead to greenhouse gas emissions, but also all countries
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