讀珠江三角洲和全國GDP增長曲線圖,回答下列問題:
(1)在人均國內(nèi)生產(chǎn)總值(GDP)的變化上,珠江三角洲地區(qū)和全國的趨勢有何差異:__________________________________________________________________________________________________________________________________________________________________
(2)分析這種差異是在20世紀(jì)80年代中期后變大的原因:____________________________________________________________________________________________________________________________________________________________________________________________
(3)珠江三角洲的經(jīng)濟特點:_____________________________________________________________________________________________________________________________________
(4)珠江三角洲地區(qū)和港澳地區(qū)如何進行合作:_____________________________________________________________________________________________________________________