Video: Cov kab thiab cov dav hlau yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A taw tes hauv geometry yog qhov chaw. Nws tsis muaj qhov loj me piv txwv li tsis dav, tsis ntev thiab tsis tob. A taw tes yog qhia los ntawm ib qho chaw. A kab yog txhais ua a kab ntawm cov ntsiab lus uas extends infinitely nyob rau hauv ob txoj kev. A dav hlau npe 3 cov ntsiab lus hauv dav hlau uas tsis nyob rau tib yam kab.
Yog li ntawd, vim li cas cov kab lus thiab cov dav hlau tsis tau txhais cov ntsiab lus?
Hauv Geometry, peb txhais a taw tes raws li qhov chaw thiab tsis muaj qhov loj me. A kab txhais tau tias yog ib yam dab tsi uas ncua infinitely nyob rau hauv ob qho tib si kev taw qhia tab sis tsis muaj dav thiab yog ib qhov ntev thaum a dav hlau extends infinitely nyob rau hauv ob qhov ntev. Muaj peb cov lus tsis tau txhais hauv geometry. A taw tes tsis muaj qhov loj me; nws tsuas muaj qhov chaw.
Tsis tas li ntawd, pes tsawg lub dav hlau muaj txhua kab thiab taw tes? Piv txwv li yog tias peb lub ntsiab lus yog A, B thiab C hauv koj daim duab ces muaj ntau lub dav hlau infinitely uas muaj cov ntsiab lus. Kuv tau piav qhia ob cov dav hlau zoo li no hauv paj yeeb hauv daim duab hauv qab no. Qhov kawg taw tes yog hais tias peb lub ntsiab lus tsis dag ntawm ib kab ces muaj raws nraim ib lub dav hlau uas muaj cov ntsiab lus.
Tom qab ntawd, lo lus nug yog, dab tsi yog cov piv txwv ntawm cov kab lus thiab cov dav hlau hauv ntiaj teb tiag?
Piv txwv tuaj yeem yog daim duab peb sab, squares, duab plaub, kab , ncig, cov ntsiab lus , pentagons, nres cov paib (octagons), thawv (prisms, los yog tsuav (cubes). Piv txwv ntawm a dav hlau yuav yog: lub desktop, chalkboard / whiteboard, ib daim ntawv, ib lub TV screen, qhov rais, phab ntsa los yog ib lub qhov rooj.
Muaj pes tsawg lub ntsiab lus koj yuav tsum tau ua ib lub dav hlau?
Hauv Euclidean qhov chaw ntawm txhua qhov ntev, lub dav hlau tshwj xeeb txiav txim siab los ntawm ib qho ntawm cov hauv qab no: Peb non-collinear cov ntsiab lus (cov ntsiab lus tsis nyob ntawm ib kab). Ib kab thiab taw tes tsis nyob ntawm kab ntawd. Ob txoj kab sib txawv tab sis sib tshuam.
Pom zoo:
Peb tus yam ntxwv dav dav ntawm cov hlau yog dab tsi?
Peb yam ntxwv ntawm cov hlau yog lawv cov conductivity zoo, malleability, thiab ci iab tsos. Cov hlau yog cov zoo conductors ntawm tshav kub thiab hluav taws xob
Dab tsi yog qhov kev teeb tsa hluav taws xob dav dav ntawm SPD thiab F thaiv cov ntsiab lus?
Sau cov txheej txheem hluav taws xob sab nraud ntawm s-, p-, d- thiab f-block ntsiab. Element General sab nrauv hluav taws xob configuration p–block(metals & non metals) ns2np1–6, where n = 2 – 6 d–block(transition elements) (n–1) d1–10 ns0–2, where n = 4 – 7 f -block(internal transition elements) (n–2)f1–14(n–1)d0–10ns2, where n=6–7
Dab tsi yog qhov txawv ntawm kev nkag siab dav dav BSH thiab kev nkag siab nqaim NSH?
12) Dab tsi yog qhov txawv ntawm qhov dav-sensitive heritability (BSH) thiab nqaim-sense heritability (NSH)? A) BSH yog ib qho kev ntsuas ntawm cov noob uas cuam tshuam rau qhov zoo, thaum NSH yog ib qho kev ntsuas ntawm cov noob nrog cov teebmeem loj. B) NSH muaj feem xyuam rau ib leeg-gene yam nkaus xwb
Dab tsi yog cov kab mob piav qhia cov kab mob ntawm tes hauv kev nthuav dav?
Cov kab mob yog cov prokaryotes, tsis muaj cov nuclei zoo thiab cov kab mob sib txuas ua ke, thiab nrog cov chromosomes tsim los ntawm ib lub voj voog DNA kaw. Lawv tuaj nyob rau hauv ntau yam duab thiab ntau thiab tsawg, los ntawm feeb spheres, cylinders thiab kauv threads, rau flagellated rods, thiab filamentous chains
Dab tsi yog cov lej thiab cov lej rational Yuav ua li cas cov ntsiab lus kos rau ntawm lub dav hlau sib koom tes?
Raws li peb tau hais, cov ntsiab lus ntawm lub dav hlau sib koom ua ke yog sawv cev raws li (a, b), qhov twg a thiab b yog tus lej lej. Rational cov lej yog cov lej uas tuaj yeem sau ua feem, p / q, qhov p thiab q yog tus lej. Peb hu rau x-coordinate ntawm lub point thiab peb hu b tus y-coordinate ntawm lub point