A. A slow growth for a long time and then a period of rapid, dramatic increase.
B. Too many people on earth and a few rapid increases in the number added each year.
C. A virtually stable or slightly decreasing period and then a sudden explosion of population.
D. A long period when death rates exceed birthrates and then a short period with higher fertility and lower
mortality.
10.During the first period of demographic history, societies were often in danger of extinction because
.
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
11. 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
VIII.书面表达(共1小题,满分25分) 【贵州省遵义航天高级中学2016届高三第一次模拟】
假设你叫李华,是一名高三学生。自从进入高三以来,你发现有的同学晚上学习到很晚,他们边学习边吃零食或喝可乐,早上则由于起床太晚而不吃早餐。你感觉这样会对身体有害。请你根据这种现象给《英语周报》写一封信反映上述情况,并谈谈自己的想法----虽然学习重要,但也要注意身体,同时应合理安排各科学习时间。
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