题目内容:
Directions:Forthispart,youareallowed30minutestowriteacompositiononthetopicChina'sPopulationinDifferentPeriods.Youshouldwriteatleast120wordsonthechartandtheoutlinegivenbelow: 1.Populationgrowthindifferentperiods. 2.Reasonsforthedifferenceinthegrowthrate.
3.Populationcontrol.

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答案解析: