問答題什么是賬戶對(duì)應(yīng)關(guān)系及對(duì)應(yīng)賬戶?賬戶對(duì)應(yīng)關(guān)系及對(duì)應(yīng)賬戶在會(huì)計(jì)核算中有何意義?