作者: 指數(shù) 時間: 2025-3-21 22:33
Fran?ois Vellas,Lionel Bécherelhe need to determine environmental concentration and hence, potential exposure). The massive inputs of science and technology involved in this process have been fuelled and motivated by the need for regulation, legislation and the setting of environmental quality standards. The output from risk asse作者: arrogant 時間: 2025-3-22 02:17 作者: 悲觀 時間: 2025-3-22 06:40 作者: Aggressive 時間: 2025-3-22 08:49 作者: antedate 時間: 2025-3-22 15:09
Fran?ois Vellas,Lionel Bécherel, while existing works in this area concentrate on the fate of toxic substances in the environments and their effects on humans. This book is unique in that it indicates various environmental issues that the theoretical ecology is potentially applicable without concentrating into any particular subj作者: Rustproof 時間: 2025-3-22 20:09
Fran?ois Vellas,Lionel Bécherelritical and target levels and catching more?females than males if the population size is larger than the target level. The simulation results suggest that management based on sex-specific hunting is effective to diminish the annual variation in hunting yield. We also estimated the population size in作者: 預(yù)示 時間: 2025-3-22 22:40
Fran?ois Vellas,Lionel Bécherelr of deaths by the infection and economic?loss are calculated as a function of the degree of intervention. The economic loss is considered to be a concave increasing function of the degree of intervention. We assumed that the situation will be resolved medically within 2 years. When the basic reprod作者: sleep-spindles 時間: 2025-3-23 01:37 作者: Malleable 時間: 2025-3-23 09:04 作者: 600 時間: 2025-3-23 10:51
Fran?ois Vellas,Lionel Bécherelibition of Chemical Weapons (OPCW) concerning results in the endeavour to exclude completely the use of chemical weapons; strengthening the effectiveness and transparency of work of the political organs of the OPCW, especially the Executive Council; enhancing co-operation between States Parties espe作者: Flatus 時間: 2025-3-23 17:38 作者: 較早 時間: 2025-3-23 19:22 作者: 狗窩 時間: 2025-3-24 02:10 作者: BUOY 時間: 2025-3-24 02:49 作者: Misgiving 時間: 2025-3-24 08:09
The International Tourism Market in the Destinations of the World,ow purchasing power of their populations but also because of the slowness of land transport and because access is restricted by poor networks of usable roads. Visitors to these areas tend to favour air transport although this is a far more expensive mode of transport.作者: PAEAN 時間: 2025-3-24 11:49 作者: Formidable 時間: 2025-3-24 18:54 作者: 搬運工 時間: 2025-3-24 23:01
y toxicology and the realism of field-based measurement. This trade-off is brought most sharply into focus through the issue of extrapolation of risk estimates between the laboratory and the field. It is a paradigm of ecotoxicology that it is possible to build tiers of test procedures, rooted in hig作者: inspiration 時間: 2025-3-25 02:58
Fran?ois Vellas,Lionel Bécherely toxicology and the realism of field-based measurement. This trade-off is brought most sharply into focus through the issue of extrapolation of risk estimates between the laboratory and the field. It is a paradigm of ecotoxicology that it is possible to build tiers of test procedures, rooted in hig作者: ALERT 時間: 2025-3-25 07:24 作者: itinerary 時間: 2025-3-25 08:13 作者: Fecundity 時間: 2025-3-25 14:32
Fran?ois Vellas,Lionel Bécherely toxicology and the realism of field-based measurement. This trade-off is brought most sharply into focus through the issue of extrapolation of risk estimates between the laboratory and the field. It is a paradigm of ecotoxicology that it is possible to build tiers of test procedures, rooted in hig作者: 安裝 時間: 2025-3-25 17:09 作者: keloid 時間: 2025-3-25 22:22 作者: ERUPT 時間: 2025-3-26 03:06
Fran?ois Vellas,Lionel Bécherelfectious even before the onset, and it is difficult to take measures against infection. The emergency measures taken by the Japanese government in the spring of 2020, requiring the general public to self-isolate where possible, succeeded in drastically reducing the number of people infected. The eco作者: 遺棄 時間: 2025-3-26 04:29 作者: Pudendal-Nerve 時間: 2025-3-26 10:16
Fran?ois Vellas,Lionel Bécherelblocking the movement of organisms upstream and downstream. Moreover, it is not possible to prevent a disaster once every several 100?years. Originally, it was designed with a balance between disaster risk and ecological risk, and these risks are not completely eliminated. Which risk is to be emphas作者: declamation 時間: 2025-3-26 12:36 作者: indemnify 時間: 2025-3-26 17:02 作者: Gossamer 時間: 2025-3-27 00:49 作者: languor 時間: 2025-3-27 03:04
ent past. The European document providing for control over safety of chemical processing facilities is the Sevezo Directive. It has become the basis for modern legislation in European governments on industrial and transportation safety. Over the past few years, Russia too has intensified its develop作者: 割公牛膨脹 時間: 2025-3-27 07:57 作者: 摻假 時間: 2025-3-27 11:17
Air Transport and Tourism, cost of tourism products and directly influences the choice of tourism destination. Air transport has contributed to the creation of new tourism markets far from tourist-generating countries which are not accessible either by road or by sea. The air transport industry occupies an important part of 作者: Detonate 時間: 2025-3-27 15:02
Selling and Marketing the Tourism Product,hese are sold at competitive prices and should be perceived to have a good quality—price ratio. The tour operator packaging and selling tourism products should enjoy a high reputation and an image of quality. Success depends on an expert knowledge of the market, skilful packaging of the products and作者: adj憂郁的 時間: 2025-3-27 20:22
Finance and Investment in International Tourism, investment are very slow. The particular structure of investments in the tourism industry, similar to industries requiring heavy investment, needs to be taken into account in the strategic management of tourism firms.作者: colostrum 時間: 2025-3-27 23:37
The Economic Impact of Tourism, the type of infrastructure and superstructure a country needs to invest in to encourage the most appropriate kind of tourism production. However, because of problems of definition (for instance, whether the impact of day-visitors should be included) and because of the relative inaccuracy of tourism作者: 斜谷 時間: 2025-3-28 04:40
Trends and Forecasts of International Tourism, the growth rate has been around 3 per cent annually despite the negative impacts caused by the economic crisis in industrialised countries and more especially by the effects of the Gulf War. After the war, the buoyancy of international tourism was fragile and the economic mechanisms (particularly m作者: cocoon 時間: 2025-3-28 07:49
http://image.papertrans.cn/i/image/472079.jpg作者: mechanical 時間: 2025-3-28 13:53
Fran?ois Vellas and Lionel Bécherel 1995作者: 地名詞典 時間: 2025-3-28 15:37
Overview: This is a text for students of international tourism at HND and undergraduate level. It looks at a number of aspects of tourism: market trends and forecasts, the economic impact of tourism, the role of marketing and finance, organisations and policies. International cases are used throughout the text.作者: LAITY 時間: 2025-3-28 18:57 作者: COWER 時間: 2025-3-28 23:51
The Theoretical Economic Determinants of International Tourism,The determinants of international tourism are factors which, with respect to the international exchange of tourism services, continually influence the position of each country in the international division of labour.作者: 無禮回復(fù) 時間: 2025-3-29 05:44
Supply in the Accommodation Sector,The accommodation sector is central to international tourism. Tourism flows are directly influenced by the size of this sector, by the way it adapts to demand and by the quality of the accommodation on offer. Three characteristics are associated with accommodation:作者: 采納 時間: 2025-3-29 09:14
Tourism Organisations and Tourism Policies,The tourism policies of many countries are a component (often an essential one) of their overall economic policy. They are developed and implemented by both professionals and administrative organisations.作者: 煩擾 時間: 2025-3-29 13:09
International Tourism in Industrialised Countries,With regards to the international tourism, industrialised countries, notably in North America and in Western Europe, have several common characteristics:
