第5题: [单项选择]What is found to have close relationship with rapid increase in population A. War between 2 countries. B. Ways discovered to increase productivity. C. Migration from a continent to another continent. D. A new religion beginning to be accepted by peopl 参考答案:B 答案解析:[注释] 答案必须在通读全文之后通过对各细节的概括才能得知:每一次都与生产力和生产方式的提高有关。即第一次在第一段倒数第二句;第二次在第二段第一句;第三次在第三段第一句。