【題目】某地區(qū)人口出生率為3.4%,而死亡率為1.2%,則下列敘述正確的是
A.人口的自然增長率為3.2%B.人口的自然增長率為2.2%
C.人口的自然增長率為-2.2%oD.人口的自然增長率為0
【答案】B
【解析】
人口增長率是一定時期內(nèi)(通常為1年內(nèi))由人口自然變動和遷移變動而引起人口增長的比率。人口增長率也可以稱為人口增長速度。由于人口遷移是否會引起人口總量規(guī)模發(fā)生變動,是有一定地域條件的。人口增長率是反映人口發(fā)展速度和制定人口計(jì)劃的重要指標(biāo),也是計(jì)劃生育統(tǒng)計(jì)中的一個重要指標(biāo),它表明人口自然增長的程度和趨勢。
人口自然增長率=(年內(nèi)出生人數(shù)-年內(nèi)死亡人數(shù))/年平均人口數(shù)×100%,或者人口出生率-人口死亡率。該地區(qū)人口出生率3.4%,死亡率1.2%,則該地的人口自然增長率是3.4%-1.2%=2.2%。故選:B。
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