[简答题]Discussion topic:
{{B}}Food{{/B}}
Example questions
· What kinds of food do people in your country like to eat
· Do you think that most people in your country eat healthily
· Do older people and younger people prefer the same kinds of food
· What kinds of food do you think will be more popular or less popular in the future
· Is food an important aspect of cultural life in your country

Questions 21-25
We can begin our discussion of "population as global issue" with what most persons mean when they discuss "the population problem": too many people on earth and a too rapid increase in the number added each year. The facts are not in dispute, it was quite right to employ the analogy that likened demographic growth to "a long, thin powder fuse that burns steadily and haltingly until it finally reaches the charge and explodes. "
To understand the current situation, which is characterized by rapid increases in population, it is necessary to understand the history of population trends. Rapid growth is a comparatively recent phenomenon. Looking back at the 8,000 years of demographic history, we find that populations have been virtually stable or growing very slightly for most of human history. For most Of our ancestors, life was hard, often nasty, and very short. There was high fertility in most places, but this wa
A. A virtually stable or slightly decreasing period and then a sudden explosion of population.
B. A slow growth for a long time and then a period of rapid, dramatic increase.
C. Too many people on earth and a few rapid increase in the number added each year.
D. A long period when death rates exceeds birthrates and then a short period with higher fertility and lower mortality.