Leej twg tsim cov hniav cuav?

Cov txheej txheem:

Leej twg tsim cov hniav cuav?
Leej twg tsim cov hniav cuav?
Anonim

Qhov ntxov tshaj plaws ntawm kev siv tshuaj kho hniav niaj hnub no tau qhia hauv xyoo 1815, los ntawm tus kws kho hniav New Orleans lub npe Dr. Levi Spear Parmly. Dr. Parmly txhawb kom nws cov neeg mob siv cov xov paj ntaub tom qab txhua qhov kev mus ntsib.

Vim li cas cov tshuaj txhuam hniav tau tsim?

Kev kho hniav tsis yog cov khoom siv dav dav txog xyoo 1815, thaum Dr. Levi Spear Parmly, kws kho hniav los ntawm New Orleans, tau tsim ib qho nyias, waxen silk xov los pab nws cov neeg mob ntxuav ntawm lawv cov hniav.. Nws txawm hais txog qhov tseem ceeb ntawm txoj hlua khi hauv phau ntawv hu ua A Practical Guide to the Management of Teeth.

Thaum twg kws kho hniav pib pom zoo kom siv tshuaj txhuam hniav?

Thawj Kws Kho Hniav Kom Pom Zoo Flossing

In 1815, tus kws kho hniav Asmeskas npe hu ua Levi Spear Parmly tau qhia lub tswv yim ntawm kev siv waxen txhob lo lo ntxhuav ua paj ntaub.

Puas yog ib qho khoom lag luam Asmeskas?

Tus kws kho hniav hauv Asmeskas, Levi Spear Parmly tau tsim flossing thaum ntxov 1800s. Thawj txoj hlua khi tau patented hauv 1874 los ntawm lub sijhawm kws kho hniav tau pom zoo rau kev xyaum. Tam sim no nyob rau hauv Teb Chaws Asmeskas, cov kev tshawb fawb uas ntsuas cov txiaj ntsig ntawm kev siv tshuaj txhuam hniav tuaj yeem tau txais nyiaj txiag thiab qhia los ntawm cov tuam txhab flossing.

Leej twg tsim cov plaub hau?

Leej Twg Tsim Kho Hniav Floss? Tab sis raws li feem ntau cov peev txheej, credit rau kev tsim kho hniav txhuam hniav raws li peb paub nws mus rautus kws kho hniav New Orleans, uas xyoo 1815 tau pib qhia nws cov neeg mob siv cov xov nyias nyias los ntxuav ntawm nruab nrab. lawvhniav.

Pom zoo:

Nthuav cov khoom
Thaum twg tus menyuam ya mus?
Nyeem ntxiv

Thaum twg tus menyuam ya mus?

Fledglings feem ntau pib sim ya thaum cov noog muaj kwv yees li ob lub lis piam, thiab txawm tias lawv tau pib tawm hauv lub zes, lawv tsis nyob ntawm lawv tus kheej, raws li cov Massachusetts Audubon Society. Cov niam txiv feem ntau nyob ze, saib xyuas lawv cov xeeb ntxwv thiab tseem muab zaub mov.

Ntau npaum li cas 99 chinning osrs?
Nyeem ntxiv

Ntau npaum li cas 99 chinning osrs?

Feem ntau, rau 99 ntau yam, koj xav tias yuav siv sijhawm 40+ hnub kev cob qhia siv hlau lossis hlau riam phom. Tab sis kuj ceeb tias, txoj kev no raug nqi txog 30M-55Mnrog rune xub lossis mithril ntuav riam. Ntxiv rau, koj tuaj yeem ua tiav 60-99 ntau yam hauv tsawg li 15 hnub.

Dab tsi yog qhov txawv ntawm lub tshuab hluav taws xob thiab lub tshuab hluav taws xob?
Nyeem ntxiv

Dab tsi yog qhov txawv ntawm lub tshuab hluav taws xob thiab lub tshuab hluav taws xob?

Gramophone: Txhua lub suab kaw suab, lossis cov cuab yeej ua si yav dhau los-cov suab kaw, tshwj xeeb tshaj yog tias nws siv lub tiaj tiaj tiaj. Phonograph: Txhua lub suab kaw suab, lossis cov cuab yeej siv rau kev ua si cov suab uas tau kaw dhau los, tshwj xeeb tshaj yog tias nws siv lub tog raj kheej tig.