Yuav ua rau ib yam dab tsi tawm mus ib txhis lossis kev xav mus tas li rau ib tus neeg lossis ib yam dab tsi. Feem ntau siv nyob rau hauv passive kev tsim kho. Daim duab ntawm koj ob hnia yog tam sim no hlawv rau hauv kuv nco tam sim no! … Cov duab ntawd tuaj yeem hlawv rau hauv TV yog tias koj tso zaj yeeb yaj kiab ncua ntev dua.
kub hnyiab hauv kuv lub cim xeeb txhais li cas?
Ua kom muaj kev xav tsis txaus ntseeg rau, xws li hauv Ib qho xwm txheej zoo li Holocaust hlawv rau hauv lub siab ntawm txhua tus neeg muaj sia nyob, lossis qhov xwm txheej tau hlawv rau hauv nws lub cim xeeb. Qhov kev qhia no hais txog qhov txheej txheem xws li etching lossis engraving, qhov twg cov tshuaj caustic tom rau hauv cov phaj khoom los ua tus tsim. [Thaum ntxov 1800s
hu li cas thaum koj hlawv ib yam dab tsi rau ib tug neeg?
lus qhia. yog tias koj scorch ib yam dab tsi, los yog scorches, nws hlawv txaus los hloov xim los yog puas rau saum npoo.
Nws lub ntsej muag raug hluav taws ntawm lub cim xeeb txhais li cas?
Nws lub ntsej muag raug hluav taws ntawm lub cim xeeb. "Nws lub ntsej muag raug hluav taws" txhais li cas? Nws blushing . Nws kub heev.
Yuav ua li cas rau tej yam uas kub hnyiab tau?
Kev kub hnyiab, ob lub atoms lossis molecules yuav ua ke thiab tso tawm lub zog. Feem ntau ib qho ntawm ob lub molecules yog oxygen lossis lwm yam tshuaj xws li nws hu ua oxidizer. Thaum cov molecules ua ke thiab tso tawm lub zog, nws raug tso tawm hauv daim ntawv ntawm tshav kub thiab feem ntau lub teeb. … Hydrogen hlawv nrog oxygen thiab tsim dej.
