2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Yuav ua li cas lawv xav tau qhov chaw nyob? Lampreys xav tau kwj merau spawning thiab rau larvae. Cov larvae burrow mus rau hauv qab ntawm ntshiab, mus tas li ntws ntws thiab lim pub rau 3 mus rau 6 xyoo ua ntej lawv hloov mus rau cov neeg laus theem thiab nkag mus rau hauv tus dej los yog reservoir.
lub teeb nyob qhov twg?
Sea lampreys yog ib txwm nyob rau Dej Hiav Txwv Atlantic, Lake Ontario thiab St. Lawrence River. Lawv kis mus rau lwm qhov Great Lakes ntawm cov kwj dej uas hla tej yam ntuj tso. Lawv tau lees paub hauv Lake Erie xyoo 1921, Lake Michigan xyoo 1936, Lake Huron xyoo 1937, thiab Lake Superior hauv 1938.
Lampreys puas noj tau tib neeg?
Kev kawm txog lub plab cov ntsiab lus ntawm qee cov lampreys tau pom qhov seem ntawm cov hnyuv, fins thiab vertebrae los ntawm lawv cov tsiaj txhu. Txawm hais tias kev tawm tsam rau tib neeg tshwm sim, lawv feem ntau yuav tsis tawm tsam tib neeg tshwj tsis yog tias tshaib plab.
Lub teeb txav li cas?
Ntau yam tsiaj - suav nrog tib neeg - ua luam dej by thawb rau dej. Qhov no ua rau lub siab zoo, uas txhawb nqa lawv mus tom ntej. Tab sis limbless lampreys kuj tsim me ntsis whirlpools - vortices ntawm tsis zoo siab - nyob rau hauv pem hauv ntej ntawm lawv lub cev thaum lawv nab lawv txoj kev los ntawm dej. Qhov "nqus" tsab ntawv tsa suab rub lawv nrog.
Yuav ua li cas yog lub teeb taws tom koj?
Parasitic lampreys tua thiab latch mus rau lwm cov ntses. Siv lawv cov kab hniav thiab tus nplaig, lawvzom rau hauv tus tswv tsev thiab kos cov ntshav thiab lwm cov kua dej. … Thaum lawv tawm tsam, lawv feem ntau tua lawv tus tswv, thiab txawm tias cov neeg raug tsim txom uas muaj txoj sia nyob yuav tsum siv lub zog ntau heev kom rov qab los ntawm lawv qhov txhab.
Pom zoo:
Cov neeg koom nrog kev lag luam twg yog cov neeg siv khoom ntawm cov tuam txhab tshuaj?
Nyiaj Tshuaj Johnson & Johnson ($ 276 billion tus nqi lag luam) Novartis ($ 273 billion) Pfizer ($ 212 nphom) Merck ($ 164 billion) GlaxoSmithKline ($ 103 billion) Eli Lilly ($ 98 nphom) Leej twg yog cov players hauv kev lag luam tshuaj?
Leej twg nyob rau ntawm daim npog ntawm cov neeg nyob hauv lub zos phem?
Tab sis Ethan Winters, White systems engineer lub hnub qub ntawm "Resident Evil 8: Village," yog tib lub cim tseem ceeb hauv koob uas nws lub cev peb nyob. Vim peb saib los ntawm nws ob lub qhov muag, thiab qhov kev ua si insistence ntawm obscuring nws lub ntsej muag, peb ntxiv txheeb xyuas nrog nws.
Qhov twg hauv qab no txiav txim siab txog cov luag haujlwm ntawm cov neeg muag khoom / tus nqi qis thiab cov neeg yuav khoom / tus neeg xauj tsev?
Cov luag haujlwm ntawm cov neeg muag khoom / tus neeg xauj tsev thiab cov neeg yuav khoom / tus neeg xauj tsev yog txiav txim siab los ntawm (1) nqe lus uas ob tog tau teev tseg hauv kev cog lus, (2) kev cai, thiab (3) cov cai teev tseg los ntawm Uniform Commercial Code (UCC).
Qhov twg tag nrho cov nqi hluav taws xob nyob ntawm qhov kev siv nyiaj siab tshaj plaws yog qhov twg?
marginal utility is zero. Tag nrho cov nqi hluav taws xob yog siab tshaj thaum marginal utility yog xoom. Qhov no yog vim muaj ntau txoj cai ntawm kev txo qis marginal utility uas hais tias tus neeg siv khoom noj ntau thiab ntau qhov zoo, qhov ntxiv rau tag nrho cov nqi hluav taws xob poob.
Nyob hauv kab thiab cov neeg ua haujlwm koom haum cov neeg ua haujlwm cov thawj coj yog cov?
Lub hwj chim ntawm command ib txwm nyob nrog cov thawj coj thiab cov neeg ua haujlwm saib xyuas cov lus qhia, lus qhia thiab pawg thawj coj ntawm cov thawj coj. Tus Kheej Tus Tuav Ntaub Ntawv rau Tus Thawj Coj Tus Thawj Coj yog ib tus neeg ua haujlwm.
