Lec 16: Interactions of EM Waves with Perfect Conductors | 8.03 Vibrations and Waves (Walter Lewin)
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English Grammar - Past Simple & Present Perfect
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31 Aug 2019
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Les langues / Langue Anglaise
http://www.engvid.com/ In this lesson, I explain what the simple past and present perfect are used for, and more importantly, when to use them properly.
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Lec 16: Interactions of EM Waves with Perfect Conductors | 8.03 Vibrations and Waves (Walter Lewin)
MITCourses
59 Vues · 29 Nov 2019
engVid
112 Vues · 16 Oct 2019
engVid
66 Vues · 16 Oct 2019
engVid
66 Vues · 15 Oct 2019
engVid
20 Vues · 15 Oct 2019