在面向?qū)ο蟮南到y(tǒng)中，對(duì)象是運(yùn)行時(shí)的基本實(shí)體，對(duì)象之間通過傳遞（44）進(jìn)行通信。（45）是對(duì)對(duì)象的抽象，對(duì)象是其具體實(shí)例。(44)A.對(duì)象B.封裝C.類D.消息(45)A.對(duì)象B.封裝C.類D.消息
