Demography is the statistical study of human populations. It can be a gen

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问题 Demography is the statistical study of human
populations. It can be a general science that can be applied
to any kind of dynamic population, that is, one that changed 【S1】______
over the time or space. It encompasses the study of the 【S2】______
size, structure and distribution of populations, and spatial
or temporal changes in them in response to birth, death,
migration and ageing.
Human demography is the most well known of discipline
demography, and typically what people refer when using 【S3】______
the term demography. Demographic analysis can be applied to
whole societies or to groups defined by criterion such as 【S4】______
education, nationality, religion and ethnicity. In academia,
demography is often regarded as a branch of either economy 【S5】______
or sociology. Formal demography limits its object of study
to the measurement of population processes, when the 【S6】______
more broad field of social demography studies also analyze
the relationships between economic, social, cultural and
biological processes influencing on a population. 【S7】______
Ibn Khaldun (1332-1406) is regarded as the "father of
demography" for his economic analysis of social organization
which produced the first scientific and theoretical work
on population, development, and group dynamics. At the
end of the 18th century, Thomas Malthus concluded that,
if unchecked, populations would be subject to exponential
growth. He feared that population growth would intend to 【S8】______
outstrip growth in food production, leading to ever increased 【S9】______
famine and poverty; he is seen as the intellectual father of
ideas of overpopulation and the limits for growth. Later 【S10】______
more sophisticated and realistic models were presented by
Benjamin Gompertz and Verhulst. [br] 【S3】

选项

答案在refer后面加上to

解析本题辨析分句中的动词词组。what引导的名词性分句作句子的主语补足语。引导词what实际上充当分句中谓语动词refer to的宾语。如果没有介词to的话，what就是充当refer的宾语，但是refer是不及物动词，所以必须加介词to。如果名词性分句或关系分句的引导词充当分句的介词宾语，那么一定不可以遗漏这个介词。

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Demography is the statistical study of human populations. It can be a gen

Bestknownforhisresearchinstatisticalmechanicsandmesonphysics,ChenNin

Bestknownforhisresearchinstatisticalmechanicsandmesonphysics,ChenNin