2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Dinosaurs tau ntshav txias, zoo li cov tsiaj reptiles niaj hnub no, tshwj tsis yog tias qhov loj ntawm ntau tus yuav ua rau lawv lub cev kub. Lawv yogntshav sov, zoo li cov tsiaj nyeg niaj hnub lossis noog dua li cov tsiaj reptiles niaj hnub no.
Puas dinosaurs sov lossis ntshav txias?
Raws li cov txheej txheem tshiab uas tshuaj xyuas cov chemistry ntawm cov qe dinosaur, cov lus teb yog sov. Dinosaurs zaum ntawm qhov kev hloov pauv ntawm cov noog, uas yog ntshav sov, thiab cov tsiaj reptiles, uas yog ntshav txias.
Yuav ua li cas cov dinosaurs sov-ntshav?
Qee tus kws tshawb fawb paleontologists xav tias tag nrho cov dinosaurs yog 'cov ntshav sov' nyob rau tib lub ntsiab lus uas niaj hnub noog thiab tsiaj nyeg yog: yog, lawv muaj cov kab mob metabolic sai. … Qee cov kws tshawb fawb xav tias cov dinosaurs loj heev tuaj yeem muaj lub cev sov vim lawv lub cev loj, ib yam li cov vaub kib hauv hiav txwv niaj hnub no.
Dinosaur dab tsi yog ntshav sov?
Tam sim no feem ntau pom zoo tias feathered dinosaurs hu ua theropods uas ua rau cov noog tau ntshav sov, tab sis tseem muaj kev sib cav txog seb puas muaj lwm pab pawg dinosaurs thiab.
Cov ntaub ntawv pov thawj dab tsi qhia tias qee cov dinosaurs tuaj yeem yog ntshav sov?
Feem ntau cov dinosaurs have erect postures thiab yog li ntawd nws tau raug pom zoo tias qhov no qhia tau tias lawv muaj kev ua haujlwm siab thiab ntshav sov. Raws li cov kab no, cov kws tshawb fawb tau saib tsis ncaj rau ntawmmuaj peev xwm ntshav siab ntawm dinosaurs; Cov tsiaj ntshav sov zoo li muaj ntshav siab.
Pom zoo:
Yuav ua li cas ua pov thawj ua ntej ntawm cov pov thawj?
Kev xav ntawm cov pov thawj yog ib hom pov thawj cov qauv siv hauv lub nra ntawm kev tshuaj xyuas pov thawj. Raws li tus txheej txheem preponderance, lub nra ntawm cov pov thawj yog ntsib thaum tog nrog lub nra qhia tus neeg nrhiav qhov tseeb tias muaj ntau dua 50% qhov kev thov yog qhov tseeb.
Vim li cas cov pov thawj yuav tsum ua pov thawj?
Zaj qhov tseeb tsim muaj qhov tseeb ntawm lwm qhov tseeb. Lawv yog cov teeb meem ntawm cov pov thawj uas ua rau muaj ib yam dab tsi tshwm sim ntau dua los yog tsawg dua qhov nws yuav yog yam tsis muaj lawv. Lawv raug lees paub los ua pov thawj thiab pab lub tsev hais plaub hauv kev daws teeb meem zaum kawg ntawm qhov teeb meem tsis sib haum xeeb.
Puas muaj pov thawj lossis tau ua pov thawj?
daim ntawv proven yog ib daim ntawv tsis sib xws yav dhau los. Ib tug tuaj yeem hais tau, Nws tau ua pov thawj nws txoj kev xav, lossis Nws tau ua pov thawj nws txoj kev xav. Raws li OED, pov thawj yog "cov ntawv ib txwm [ntawm kev koom tes yav dhau los]
Daim ntawv pov thawj puas txhais tau tias koj tau ntawv pov thawj?
A daim ntawv pov thawj txoj haujlwm tsis ua rau daim ntawv pov thawj kev tshaj lij. Yog lawm, cov kev kawm uas koj kawm hauv daim ntawv pov thawj tuaj yeem pab koj npaj kom tau txais daim ntawv pov thawj kev ua haujlwm tshwj xeeb, tab sis kev tau txais daim ntawv pov thawj tsis zoo ib yam li tau txais ntawv pov thawj.
Puas yog daim ntawv pov thawj lossis ntawv pov thawj tus kws qhia davhlau?
Daim ntawv pov thawj yog qhov ua tau lees paub. Lawv zoo sib xws tab sis tsis zoo ib yam. Qhov tseeb, hais txog cov kws qhia dav hlau, FAA ditched Certificate / Certified adjective ntev dhau los. Tam sim no tsuas yog "tso cai" tus kws qhia.
