Test preparationTest preparation (abbreviated test prep) or exam preparation is an educational course, tutoring service, educational material, or a learning tool designed to increase students' performance on standardized tests. Examples of these tests include entrance examinations used for admissions to institutions of higher education, such as college (e.g. the SAT and ACT), business school (the GMAT), law school (the LSAT or LNAT), medical school (the MCAT), BMAT, UKCAT and GAMSAT and graduate school (the GRE) and qualifying examinations for admission to gifted education programs.
Avantage comparatifEn économie, l'avantage comparatif est le concept principal de la théorie traditionnelle du commerce international. Il a été approché par Robert Torrens en 1815 et démontré pour la première fois par l’économiste britannique David Ricardo en 1817 dans ses Principes de l’économie politique et de l’impôt. La théorie associée à l’avantage comparatif explique que, dans un contexte de libre-échange, chaque pays a intérêt à se spécialiser dans la production pour laquelle il dispose de l'écart de productivité (ou du coût) le plus fort en sa faveur, ou le plus faible en sa défaveur, comparativement à ses partenaires.
Sample preparationIn analytical chemistry, sample preparation (working-up) refers to the ways in which a sample is treated prior to its analyses. Preparation is a very important step in most analytical techniques, because the techniques are often not responsive to the analyte in its in-situ form, or the results are distorted by interfering species. Sample preparation may involve dissolution, extraction, reaction with some chemical species, pulverizing, treatment with a chelating agent (e.g.
