2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Concave txhais tau tias "hollowed tawm lossis sib npaug sab hauv" thiab nco tau yooj yim vim tias cov chaw no "lub qhov tsua" nyob rau hauv. Qhov opposite yog convex lub ntsiab lus "curved los yog rounded outward." Ob lo lus tau nyob ib puag ncig rau ntau pua xyoo tab sis feem ntau sib xyaw. Cov lus qhia hauv daim iav yuav nyob ze dua li qhov tshwm sim.
Pab twg yog concave thiab convex?
Convex surfaces curves outward . Yog tias koj muaj teeb meem nco ntsoov seb lub ntsej muag yog concave los yog concave, nws yog ib qho yooj yim mus nrhiav tau. Lub concave nto nkhaus sab hauv, zoo li lub qhov ncauj ntawm lub qhov tsua.
Puas yog concave lossis convex negative?
Nyob rau hauv lej, qhov ua haujlwm concave yog qhov tsis zoo ntawm convex function.
Dab tsi yog qhov sib txawv ntawm convex thiab concave lo ntsiab muag?
Lens yuav muab faib ua ob hom loj: convex thiab concave. Lens uas tuab ntawm lawv qhov chaw tshaj li ntawm lawv cov npoo yog convex, hos cov uas tuab nyob ib ncig ntawm lawv cov npoo yog concave. Lub teeb ci dhau los ntawm lub lens convex yog tsom los ntawm lub lens ntawm ib qho taw tes ntawm sab nraud ntawm lub lens.
Puas yog tib neeg lub qhov muag concave los yog convex?
Lub lens tam sim no hauv tib neeg lub qhov muag yog convex lens. Peb tib neeg tuaj yeem pom ntau xim lossis khoom. Peb tuaj yeem pom cov khoom no vim tias lub teeb los ntawm qhov pom kev npau taws ntawm cov hluav taws xob hluav taws xob, tawm los ntawm cov khoom nkag mus rau hauv peb lub qhov muag, dhau los ntawm lub lens thiab tom qab ntawd poob rau ntawm retina hauv peb.ob lub qhov muag.
Pom zoo:
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Cov iav concave thiab convex yog dab tsi?
Muaj ob hom iav nkhaus (convex thiab concave). Ib daim iav uas tawm sab nraud yog hu ua daim iav convex. Convex mirrors qhia tej yam yog txoj hauv kev thiab feem ntau me me. Daim iav uas ua rau sab hauv yog hu ua daim iav concave. Yuav ua li cas koj thiaj paub tias daim iav yog concave los yog convex?
Leej twg yog convex thiab concave?
Concave piav qhia cov duab uas nkhaus sab hauv, zoo li ib teev. Convex piav qhia cov duab uas nkhaus sab nraud, zoo li football (los yog pob rugby). lub pob zeb ua dab tsi? Convex lo ntsiab muag yog siv hauv tsom iav los kho qhov pom kev deb, qhov kev ncua deb ntawm lub qhov muag lub lens thiab retina luv dhau, vim tias qhov chaw focal nyob tom qab retina.
Cov iav concave thiab convex tsim li cas?
Thaum koj khaws ib qho khoom nyob rau pem hauv ntej ntawm daim iav concave, ib daim duab loj ntawm cov khoom raug tsim thaum nws nyob ze rau ntawm daim iav thiab ib daim duab inverted ntawm cov khoom yog tsim thaum nws nyob deb. A daim iav convex ib txwm ua ib qho me me thiab ib daim duab tsim ntawm cov khoom.
Leej twg detering nyob rau hauv tag nrho cov nyob ntsiag to nyob rau sab hnub poob pem hauv ntej?
Detering yog tus neeg ua liaj ua teb los ntawm Txhua Tus Neeg Tsis Txaus Siabntawm Sab Hnub Poob los ntawm Erich Maria Remarque. Nws muaj siab mos siab muag, tshwj xeeb tshaj yog thaum nws los txog rau nees. Nws muaj kev kub ntxhov loj heev thaum nws hnov cov nees quaj thiab txawm sim tua lawv kom kawg lawv txoj kev txom nyem.
