Cov lus qhia hauv qab no yog txhua yam hais txog pvc ua npuas ncauj daim ntawv , los ntawm cov khoom muaj feem xyuam no, koj tuaj yeem tau txais cov ntaub ntawv tseem ceeb, sau ntawv hauv kev siv, lossis cov ncauj lus tshiab txog pvc ua npuas ncauj ntawv .Peb vam tias cov xov xwm no yuav muab kev pab koj xav tau.Thiab yog tias cov ntaub ntawv pvc ua npuas ncauj tsis tuaj yeem daws koj cov kev xav tau, koj tuaj yeem tiv tauj peb rau cov ntaub ntawv tseem ceeb.