Raws li cov tub ceev xwm saib xyuas hauv Ministry of Education mus rau lub teb chaws ntawm cov ntawv tshawb fawb pom tau tias tus xibfwb cov kab mob kev ua haujlwm tau nce xyoo, qhov sib txawv ntawm ntau cov kab mob kev ua haujlwm, nrog rau plab ntses uas ua rau pneumoconiosis thiab ntau yam mob thiab ntev cov kab mob ntsig txog tus kab mob hauv Suav teb tus xibfwb txoj haujlwm no yog qhov tseem ceeb tshaj plaws, qhov loj tshaj thiab kev loj hlob ntawm myopia hauv cov tub ntxhais kawm kuj tau nce xyoo ib xyoos, txog qhov txawv ntawm qhov txawv txav.
Chalk los ntawm nws cov khoom xyaw, cov khoom xyaw tseem ceeb yog calcium carbonate (limestone) thiab calcium sulfate (gypsum), ib qho me me ntawm calcium oxide thiab lwm yam me me hlau ntsiab xws li hlau, cadmium, thiab lwm yam., Txawm tias kev txhim kho ntawm daim tseem nyob rau hauv kev ua lag luam yog cov hmoov av dawb, tab sis nyob rau hauv daim kab xev thawj cov roj ntsha los yog cov cawv zoo li cov kua nplaum, Tom qab ntxiv qhov feem ntau ntawm cov ntaub ntawv raw, kom qhov feem ntawm chalk thiab ntim raug nce, tsis yoojyim , tab sis nyob rau hauv daim ntawv thov tsis yog cuab kev. Nrog cov tshuaj acidity ntawm chalk raws li nws lub cev tsis muaj zog alkaline, los ntawm nws lub cev nqaij daim tawv uas yog daim npuag sau ntawv thiab chalk lwv cov txheej txheem ntawm nws cov ntsiab tshuaj muaj pes tsawg leeg, concentration, dispersion, lub ntiajteb txawj nqus, zoo, nyuaj, solubility, thiab lwm yam, ua rau muaj ntau plua plav, ploj hauv cov huab cua, huab cua phem nyob hauv tsev huab cua, Ua kom tsis muaj teeb meem ntawm lub cev thiab lub hlwb ntawm cov xibfwb thiab cov tub ntxhais kawm ntawv, raug mob ntawm cov khoom siv niaj hnub xws li txawb projector, projectors, computers thiab laboratories thiab lwm yam khoom tseem ceeb , cuam tshuam rau kev ua tau zoo ntawm cov khoom no, kev siv lub neej zoo thiab lub neej. Tib lub sij hawm, vim yog siv ntau npaum li cas, nws yog qhov yuav tsum tau ua kom cov mineris muaj ntau cov limestone, ore thiab gypsum me me, uas yuav ua rau muaj kev puas tsuaj thiab thaj chaw puas tsuaj.
Txuas ntxiv rau cov tub ntxhais kawm ntawv vim muaj cov xim dub dawb, xim dub thiab dawb, thiab cov plua plav paug hauv chav kawm los ntawm qhov teeb meem ntawm cov ntaub ntawv tshawb fawb tshawb pom ntawm China: 1992 Xov Xwm uas muab piv rau 1980 cov ntaub ntawv sib xws, 10 xyoo 22 lub nroog (lub nroog, Cov tub ntxhais kawm hauv tsev kawm ntawv qib siab yog 75.79%, tus menyuam kawm ntawv qib high school yog 75.79%, lub tsev kawm ntawv qib siab tau ze li 80%, txhua xyoo tab tom pib sib.
