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  2. International English Language Testing System - Wikipedia

    en.wikipedia.org/wiki/International_English...

    International English Language Testing System (IELTS / ˈ aɪ. ɛ l t s /) [6] is an international standardized test of English language proficiency for non-native English language speakers. It is jointly managed by the British Council, IDP and Cambridge English, [6] and was established in 1989. IELTS is one of the major English-language tests ...

  3. EF Standard English Test - Wikipedia

    en.wikipedia.org/wiki/EF_Standard_English_Test

    EF compares the EFSET's accuracy to the most widely used high stakes standardized English tests: TOEFL, IELTS, and Cambridge International Examinations. [ 2 ] There are three versions of the EFSET: a 15-minute test which is basically a quiz type test, a 50-minute test which assesses the reading and listening skills, and a 90-minute test which ...

  4. Duolingo English Test - Wikipedia

    en.wikipedia.org/wiki/Duolingo_English_Test

    The Duolingo English Test (DET) is a standardized test of the English language designed to be internet-based rather than paper-based. DET is an adaptive test that uses an algorithm to adapt the difficulty of the test to the test-taker.

  5. Palmer Method - Wikipedia

    en.wikipedia.org/wiki/Palmer_Method

    Florey, Kitty Burns (January 20, 2009). Script and Scribble: The Rise and Fall of Handwriting (First ed.). Melville House. ISBN 978-1933633671.; The Palmer Method of Business Writing: A Series of Self-teaching Lessons in Rapid, Plain, Unshaded, Coarse-pen, Muscular Movement Writing for the Home Learner, Where an Easy and Legible Hand-writing is Sought.

  6. Are you stretching correctly? Fitness experts break down what ...

    www.aol.com/news/type-stretch-best-workout...

    Editor’s note: Before beginning any new exercise program, consult your doctor.Stop immediately if you experience pain. As you head into the gym, you likely already have a workout plan in mind ...

  7. Molecular vibration - Wikipedia

    en.wikipedia.org/wiki/Molecular_vibration

    For example, when this treatment is applied to CO 2, it is found that the C=O stretches are not independent, but rather there is an O=C=O symmetric stretch and an O=C=O asymmetric stretch: symmetric stretching: the sum of the two C–O stretching coordinates; the two C–O bond lengths change by the same amount and the carbon atom is stationary.

  8. Molecular symmetry - Wikipedia

    en.wikipedia.org/wiki/Molecular_symmetry

    The irreducible representation for the C-O stretching vibration is A 1g + E g + T 1u. Of these, only T 1u is IR active. B 2 H 6 has D 2h molecular symmetry. The terminal B-H stretching vibrations which are active in IR are B 2u and B 3u. Diborane. Fac-Mo(CO) 3 (CH 3 CH 2 CN) 3, has C 3v geometry. The irreducible representation for the C-O ...

  9. Upside-down question and exclamation marks - Wikipedia

    en.wikipedia.org/wiki/Upside-down_question_and...

    Upside-down marks, simple in the era of hand typesetting, were originally recommended by the Real Academia Española (Royal Spanish Academy), in the second edition of the Ortografía de la lengua castellana (Orthography of the Castilian language) in 1754 [3] recommending it as the symbol indicating the beginning of a question in written Spanish—e.g. "¿Cuántos años tienes?"