Cov txheej txheem:
- Thaum twg lub khoos phis tawj tau hloov pauv tau?
- thawj lub PC portable yog dab tsi?
- Thaum twg lub khoos phis tawj nqa tau nrov nrov?
- thawj qhov khoom siv yog dab tsi?
Video: Lub sijhawm xyoo kaum xyoo twg yog cov khoom siv nqa tau tshaj tawm?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
thawj lub lag luam muag portable yog 50-phaus (23 kg) IBM 5100, qhia 1975. Cov khoom loj tom ntej no yog Osborne's 24-phaus (11 kg) CP / M-based Osborne 1 (1981) thiab Compaq's 28-phaus (13 kg), tshaj tawm tias 100% IBM PC tau tshaj Compaq Portable (1983).
Thaum twg lub khoos phis tawj tau hloov pauv tau?
Thawj lub khoos phis tawj tau tsim nyob rau hauv Lub Plaub Hlis 1981 los ntawm lub tuam txhab hu ua Osborne, coj los ntawm tus neeg sau xov xwm hloov ua lag luam hu ua Adam Osborne. Txhawm rau ua kev zoo siab rau lub tuam txhab ntev mus txog 30 xyoo, Harry McCraken ntawm Technologizer muaj qhov zoo tshaj plaws ntawm Osborne hnub no.
thawj lub PC portable yog dab tsi?
Nyhav 24 phaus thiab raug nqi $ 1, 795, Osborne 1yog thawj lub khoos phis tawj tsim khoom loj. Nws tus nqi yog qhov tshwj xeeb tshaj yog txaus nyiam vim lub khoos phis tawj suav nrog cov khoom siv tau zoo heev uas muaj nqis txog $ 1,500 ib leeg. Nws nthuav tawm 5-nti zaub, 64 KB ntawm lub cim xeeb, lub modem, thiab ob lub 5.25-nti floppy disk drives.
Thaum twg lub khoos phis tawj nqa tau nrov nrov?
Thaum kawg ntawm 1980s, laptop computers tau dhau los ua neeg nyiam ntawm cov neeg lag luam. Lub 16-ntsis COMPAQ SLT/286 tau nthuav tawm thaum Lub Kaum Hli 1988, yog thawj lub roj teeb siv lub laptop los txhawb lub hard disk sab hauv thiab VGA tshaj LCD npo.
thawj qhov khoom siv yog dab tsi?
The Osborne 1: Thawj Ua Lag Luam Ua Tau Zoo "Portable" Computer.. Nws hnyav nees nkaum peb phaus, khiav CP/M kev khiav haujlwm, thiab muag rau $ 1795, nrog $ 2000 tus nqi ntawm software suav nrog.
Pom zoo:
Cov khoom lag luam thiab cov khoom siv tau siv rau dab tsi?
Tshuaj thiab pillory Cov no tau siv rau txim rau tib neeg rau kev ua txhaum cai xws li kev cog lus lossis kev qaug dej qaug cawvCov neeg ua phem yuav zaum lossis sawv ntawm ib lub thav ntoo thiab cov neeg hauv zos yuav pov cov khoom noj lossis txawm tias pob zeb rau lawv.
Lub sijhawm twg yog lub sijhawm twg cov kab mob trilobite?
Trilobites, tshwj xeeb yog cov tsiaj hauv hiav txwv, thawj zaug tshwm sim ntawm pib ntawm Cambrian Lub Sijhawm, kwv yees li 542 lab xyoo dhau los, thaum lawv nyob hauv hiav txwv. Txawm hais tias lawv tau dhau los ua tsawg dua hauv kev ua tiav geological lub sijhawm, ob peb daim ntawv txuas ntxiv mus rau Permian Lub Sijhawm, uas tau xaus txog 251 lab xyoo dhau los .
Lub sijhawm lub sijhawm twg yog qhov khoom nrawm nrawm?
Qhov tseeb, qhov nrawm hloov pauv tas li - 10 m / s - hauv txhua ob lub sijhawm. Txhua lub sijhawm khoom nrawm hloov pauv, cov khoom raug hais kom nrawm; nws muaj acceleration . Yuav ua li cas koj pom lub sijhawm nrawm ntawm ib qho khoom?
Vim li cas cov neeg siv khoom thiab cov khoom siv tau siv hauv c ++?
Lub hom phiaj ntawm kev siv getters thiab setters yog txhawm rau zais cov ntaub ntawv khaws cia thiab rov qab li casTxoj kev no, yog tias koj hloov tus cwj pwm, koj tsis tas yuav hloov tus lej. nyob rau hauv ib txhiab qhov chaw. Tab sis, yog tias koj tsis tas yuav hloov qhov kev siv, koj tau ua koj cov cai ntau dua thiab tau txais me ntsis los ntawm kev ua li ntawd .
Thaum lub sijhawm tsim cov coke twg ntawm cov hauv qab no tau txais los ntawm cov khoom lag luam?
Coal tar: Nws tau los ua cov khoom lag luam hauv cov txheej txheem ntawm kev ua coke . Coke yog ib qho khoom los ntawm dab tsi? Cov lus tsis tsim nyog "coke" feem ntau yog hais txog cov khoom lag luam los ntawm qis-ash thiab qis-sulphur bituminous thee los ntawm txheej txheemhu ua coking.
