【aboutdouble-decliningbalancemethodindepreciationsincetheannualdepreciationexpenseisdependedontheusefulyearonly,soitisverylikelythatthecostofassetwillexpirebeforetheusefullife,andit'salsopossiblethat,attheendof】

　　aboutdouble-decliningbalancemethodindepreciation

　　sincetheannualdepreciationexpenseisdependedontheusefulyearonly,soitisverylikelythatthecostofassetwillexpirebeforetheusefullife,andit'salsopossiblethat,attheendoftheusefullife,thebookvalueisgreaterthanthesalvagevalue.

　　Then,isitapplicableinpractice?