Amaya Toman Txij li thaum pib ntawm kev lag luam thev naus laus zis, ntau dua lossis tsawg lub sijhawm tseem ceeb tshwm sim txhua hnub hauv cheeb tsam no, uas tau sau tseg hauv keeb kwm hauv txoj hauv kev tseem ceeb. Hauv peb cov yeeb yaj kiab tshiab, txhua hnub peb nco qab cov sijhawm nthuav lossis tseem ceeb uas muaj keeb kwm txuas nrog rau hnub tim.
Nws yuav yog txaus siab rau koj
THOR-CD tso tawm (1988)
Thaum lub Plaub Hlis 21, 1988, Tandy Corporation tshaj tawm txoj kev loj hlob ntawm THOR-CD - ib qho kev tshem tawm thiab rov siv tau rov ua dua tshiab rau kev kaw suab paj nruag, yees duab lossis cov ntaub ntawv. Txawm li cas los xij, kev tsim ntau ntawm cov discs tau raug ncua ntau zaus, thiab Tandy Corporation thaum kawg muab tag nrho cov haujlwm hu ua THOR-CD tuav - ib qho ntawm cov laj thawj yog, ntawm lwm yam, cov nqi tsim khoom siab dhau lawm. Thaum lub sij hawm thaum Tandy tuaj nrog hom CD, compact discs tau siv nyob rau hauv feem coob ntawm cov neeg siv suab paj nruag, tsis yog rau cov ntaub ntawv kaw.
Nws yuav yog txaus siab rau koj
Jaromir Miko Txoj Cai Tiv Thaiv Menyuam Hauv Online tau pib siv (2000)
Thaum Lub Plaub Hlis 21, 2000, ntawm lwm yam, Txoj Cai Tiv Thaiv Kev Tiv Thaiv Me Nyuam Hauv Online, uas tau pom zoo thaum Lub Kaum Hli 1998, tau pib siv txoj cai lij choj hais txog kev sau cov ntaub ntawv tus kheej los ntawm cov menyuam yaus hnub nyoog qis dua 13 xyoos, uas tsis tuaj yeem tshwm sim yog tsis muaj kev tso cai ntawm tus neeg sawv cev raug cai. Txoj cai lij choj no yog vim li cas thiaj li muaj ntau lub vev xaib thiab cov kev pabcuam hauv web tuaj yeem siv tau txij li hnub nyoog 13 xyoos.
Cov duab thaij duab
Lwm yam xwm txheej (tsis yog xwb) los ntawm kev siv tshuab
- Danish kws tshawb fawb Hans Christian Ørsted thawj zaug qhia txog lub neej ntawm electromagnetism (1820)
- Lee de Forest tshaj tawm qhov kev tsim ntawm phonofilm thev naus laus zis, qhov twg ob qho tib si suab thiab zaj duab xis nyob ntawm ib lub celluloid sawb (1919)
