A.only one in ten persons could live past 40
B.our ancestors had little enthusiasm for more children
C.there was higher mortality than fertility in most places
D.it was too dangerous to have babies due to the poor conditions
答案:C 细节理解题。根据第二段“because death rates could exceed their birthrates”可知。
8.The author of the passage intends to ________.
A.warn people against the population explosion in the near future
B.find out the cause of rapid increase in population in recent years
C.present us a brief and clear picture of the demographic growth
D.compare the demographic growth pattern in the past with that after 1650
答案:C 主旨大意题。根据文章首段作者把“人口问题”与“导火线”作比较以及最后一段列举的一些数字可知,作者很客观地陈述人口增长的情况。
1.global adj. 全球的
2.current adj./n. 当前的;通用的;电流;水流
3.exceed vt./vi. 超过;胜过
4.approximately adv. 大约
5.abstract adj. 抽象的
1.in danger of 处于……的危险中
2.at present 目前,现在
原文:To understand the current situation, which is characterized by rapid increases in population, it is necessary to understand the history of population trends.(不定式作目的状语)
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