不過(guò)經(jīng)驗(yàn)告訴我們,退格鍵不會(huì)那樣.Experience tells us that Backspace does nothing of the sort.按退格鍵可刪除插入點(diǎn)之前的字符.And pressing the Backspace key deletes the character before the insertion point.按退格鍵刪除鍵入時(shí)發(fā)生的錯(cuò)誤.Press the backspace button to de...