نتایج جستجو برای: today many countries have water shortage problems
تعداد نتایج: 4308633 فیلتر نتایج به سال:
Smallpox, which has almost disappeared in many countries, is still one of the chief communicable disease in Kweilin, the capital of Kwangsi Province, China. Since the outbreak of the Sino-Japanese War in 1937, that city has become one of the most important centres in Free China. With rapid improvements in transport by highways, air and water, sudden increase of population from less than 50,000 ...
the treatment of in completely formed pulpless teeth has presented considrable problems. these teeth have wide open apexes and the walls of the root canal diverge toward the apical tissues. mechanical preparation cannot be done in the normal manner beacause of the large initial size and the taper of apical part of the canal , a mechanical stop cannot be produced at the apex of the canal and , t...
shortage of water has been a great consideration since ancient times in iran. the yearly average atmospheric precipitation in iran is around 250 mm considering the total area of the country, it can be estimated that our share of water is 420 x 109 per year. due to evaporation and run off to the sea through rivers and infliction it has been estimated the available water can not be more than 120 ...
an investigation into oral interaction in language classes: a conversation analytic point of view the aim of this thesis is to analyze the interaction between language teachers and students in english language institutes. this work is done in the context of yasuj city. learning another language, which is in most cases english, involves many variables. one of these variables is the linguistic...
today, more than ever, “multi-national marriages” are taking place, consequently many of the rules of citizenship have changed. many countries have accepted the equality of citizenship for each party of marriage in a multi-national family and have orientated from “unity of nationality” to the “independence of nationality”. therefore, each parent can pass her nationality through it, and most cou...
The anabolic steroids associated androgens have exposed the world with abuse problems during recent decades. The consumption of testosterones has been growing rapidly since the 1930s as androgens. Athletes were noticed about the hormonal effects of testosterones, and so the consumption of testosterones has rapidly increased among bodybuilders and other athletes from the 1950s to the 1970s. So, ...
A mathematical programming approach is developed for deriving estimates of the willingness-to-pay of water customers for improvements in water supply reliability. Reliability is represented as a probability distribution of different shortage levels, allowing the valuation of different profiles of water supply reliability. The approach is examined analytically and a two-stage linear programming ...
plagiarism in esl/efl learning contexts has been established as a dynamic and multi-layered phenomenon and has become a topic engaging many researchers in a heated debate in recent years. comparisons of student-generated texts with their source texts have shown that students rely on source texts in their writings and copying is a major strategy used by both l1 and l2 writers. in our country a...
Introduction: Doctors’ shortage has remained a concernworldwide. The developed countries started aids to recruitinternational medical graduates (IMG) to cope with the defectsthat the health care system suffers from; however, this solution maynot work in developing countries that have a limited resource andpoor budget to spend on the health care system. This study aimsto present an alternative w...
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