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Historical demographers have generally agreed on two interrelated features of the urban populations in early-modern Germany. First in accordance with the law of natural decrease, extremely high mortality rates in cities (urban areas with more than 10,000 inhabitants) meant that their populations could not be sustained by reproduction alone. Population density, inadequate sanitary conditions, and poor housing made cities too vulnerable to disease and death. Second, when city populations did increase, it was as a result of in-migration sufficient to overcome the population losses caused by the high mortality. But because the parish registers of urban communities with fewer than 10.000 inhabitants show that the annual number of births usually equaled or exceeded that of deaths, historical demographers assume that the law of natural decrease did not apply to small towns.
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当前版本由 笑笑笑笑笑 更新于2024-08-16 14:10:53 感谢由 笑笑笑笑笑 对此题目的解答所做出的贡献。
根据转折部分的取反预测，小城市不适用于这两条法则，再加上最后一句标红的词，说明小城市的出生人口大约等于或超过死亡人口，也就意味着出生率大于50%，而大城市的出生率是小于50%的，因此A正确
B错误。重点词significant factor，文中没提，只提到了如果人口增长，就是因为in-migration，所以不对
C错误。没有提到extended period
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194658cpse
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小李奥
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extend确实没提到，硬说的话a可以是Population density, inadequate sanitary conditions, and poor housing made cities too vulnerable to disease and death，小城市没有这些所以会更好一点？
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闇に負けないぜ
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234341yrywz
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