【題目】世界上人口自然增長率最高的大洲是（　�。�

A.亞洲B.非洲

C.拉丁美洲D.大洋洲

【答案】B

【解析】

人口自然增長率是一定時(shí)期內(nèi) (通常為一年) 人口自然增加數(shù) (出生人數(shù)減去死亡人數(shù)) 與同期平均總?cè)丝跀?shù)之比，用千分?jǐn)?shù)表示。人口自然增長率是反映人口自然增長的趨勢和速度的指標(biāo)。人口自然增長率水平取決于人口出生率和人口死亡率兩者之間的變動(dòng)情況。當(dāng)人口出生率和人口死亡率都高，則人口自然增長率低；當(dāng)人口出生率高，人口死亡率低，則人口自然增長率高；當(dāng)人口出生率低，人口死亡率也低時(shí)，則人口自然增長率就低。20世紀(jì)以來，發(fā)達(dá)國家的人口自然增長率比較低，發(fā)展中國家的人口自然增長率比較高。

人口自然增長率是反映人口自然增長的趨勢和速度的指標(biāo)，20世紀(jì)以來，發(fā)達(dá)國家的人口自然增長率比較低，發(fā)展中國家的人口自然增長率比較高。世界上人口自然增長率最高的大洲是非洲。故選B。

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