填空題物空間一個(gè)物點(diǎn)對(duì)應(yīng)像空間中唯一的像點(diǎn),這種一一對(duì)應(yīng)關(guān)系稱為(),這兩個(gè)對(duì)應(yīng)點(diǎn)稱為()