Qhov sib txawv ntawm daim ntaub ib sab thiab ob sab ntaub
1. Cov kab sib txawv.
Ob chav sided daim ntaub muaj tib lub lis ntawm ob sab, thiab ib sab daim ntaub muaj pom tseeb hauv qab.Feem ntau hais lus, daim ntaub ib sab zoo li ib lub ntsej muag, thiab daim ntaub ob sab yog tib yam ntawm ob sab.
2. Qhov sib txawv sov so tuav.
Daim ntaub ob sab hnyav dua li daim ntaub ib sab.Ntawm chav kawm, nws yog thicker thiab warmer
3. Cov ntawv thov sib txawv.
Ob chav sided ntaub, ntau rau cov me nyuam hnav.Feem ntau, cov neeg laus siv tsawg dua ob sab ntaub.Yog tias koj xav ua cov ntaub tuab, koj tuaj yeem ncaj qha siv cov ntaub txhuam hniav thiab daim ntaub terry.
4. Cov nqi sib txawv.
Tus nqi loj sib txawv feem ntau yog vim qhov hnyav gram.Tus nqi ib kilogram yuav luag tib yam, tab sis gram hnyav ntawm ib sab yog ntau me dua li ntawm ob sab, yog li muaj ntau ntau meters ib kilogram.Tom qab hloov dua siab tshiab, muaj qhov kev xav tsis thoob tias daim ntaub ob sab yog kim dua li daim ntaub ib sab
