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Why does the author mention immigration and emigration in paragraph 8？
A．To identify factors affecting population dispersion
B．To give examples of territorial behavior. in animals
C．To show that populations balance themselves over time
D．To explain why animal populations are uniformly dispersed
答案
更多“Why does the author mention immigration and emigration in paragraph 8？A．To identify factor”相关的问题
第1题
Why does the author mention Oates's book Them？
A．It is a typical novel of the 1960's.
B．It is her best piece of nonfiction.
C．It is a fictional work based on the experiences of another person.
D．It is an autobiography.
第2题
Why does the author mention the Weddell Sea？
A．To show that this body of water has salinity variations.
B．To compare Antarctic waters with Arctic waters.
C．To give an example of cold-water salinity.
D．To point out the location of deep waters.
第3题
Why does the author mention the high infant death rates in the last two paragraphs？
A．To illustrate the inefficiency of the Government.
B．As the data of Helen Christensen's research project.
C．To illustrate the difficult pregnancy and motherhood.
D．As the result of mothers' absent-mindedness and tiredness.
第4题
Why does the author use the saying "Knowledge is power" in the passage？
A．Because the saying is the truest of all other sayings.
B．Because the author wants to emphasize the importance of the information explosion.
C．Because knowledge is more important than power in the information era.
D．Because knowledge equals to information in modern times.
第5题
Why does the author mention Florence Nightingale？
A．To describe the career of a pioneer of nursing education.
B．To show that women doctors supported the effort to upgrade nursing.
C．To prove that conditions differed in military and civilian hospitals.
D．To show the similarity of her means to those used by United States reformers.
第7题
Why does the author say Google should be hurt the least？
A．Because Google shows the strongest profit-making trend.
B．Because Google does search advertising business.
C．Because search advertising is the only medium outrunning traditional ones.
D．Because search advertising will attract more investment.
第8题
According to the passage, why does the author give details about each category？
A．To illustrate which kind of studier is the best.
B．To compare these three categories.
C．To explain why some studiers get high grades.
D．To suggest that crammers should spend more time on study.
第9题
Why does the author mention stuffed drug smugglers？
A．Because they can attack without warning just like bears.
B．Because they are used to give warnings to visitors about bears.
C．Because they are as funny as stuffed bears.
D．Because they are used to show the oddness of the stuffed bears.
第10题
Why does the author mention Columbia University in lines 9 and 10？
A．Hazen and Brown developed nystatin there.
B．Brown was educated there.
C．Hazen did research there.
D．It awarded a prize to Hazen and Brown.
