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      (dng)ǰλãAԇW(wng) >> иԇ >> иo(do) >> иx >> иԇxC(jng)~24

      иԇxC(jng)~24

      AԇW(wng)   2013-09-10    С
          History of Transportation \ݔ?sh)İl(f)չʷ Prehistoric Times ʷǰr Ancient Greece and Rome ϣD_R The Middle Ages orڣ The Age of Overseas Expansion Urڣ Development of Inland Transport (ni)\ݔ?sh)İl(f)չ The Mississippi River Ⱥӣ Road · Turnpike M· The Steam Age r Steam Engine C History of Railroad F·l(f)չʷ Developments In The United States F·İl(f)չ The First Transcontinental Rail Lines һlM؞޴ꑵF· Sleeping Car P܇ U.S. Steel: Carnegie & Morgan FĦc(ni) The 1920s and The Great Depression 1920 Լ(jng)ʒl Amtrak F·\˾ The Beginnings of Modern Transportation F(xin)ͨԴ Airplane wC First Human Flights ĵһwУ The Wright Brothers Rֵܣ
          Principles of Flight wеԭ Creating Lift (chung) Drag and Thrust ҷcM Airship w The Hindenburg dDZ̖¼ Automobile ܇
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          COMMUNICATION
          The Development of Communications Systems İl(f)չ Writing ֵĚvʷ Pictograms D֣ Cuneiform Ш֣ Syllabic Writing System (ji)ϵy(tng)ijF(xin) Hieroglyphics (Holy + Carving) ֣ Rosetta Stone _֮i_ʯ Ideography ֣ Logography ~֣ Bone and Shell Script ׹ģ Rebus i Alphabet ĸ Manuscript ֌壩 Papyrus ɯݼ Wax Tablets Ϟ壩 Parchment Ƥ Book of Hours ÿնYٝ Paper Manuscripts ָ壩 Tsai Lun ̂켈
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