题目内容
A major reason for (21) in the animal world is territory. The male animal establishes an area. The size of the area is sufficient to provide food for him, his (22) and their offspring. Migrating birds, for example, (23) up the best territory in the order of" first come, first (24) . "The late arrivals may acquire larger territories, but less food is (25) ,or they are too close to the (26) of the enemies of the species. (27) there is really insufficient food or the danger is very great, the animal will not mate. In this way, the members of the species which are less fit will not have (28) .When there is conflict (29) territory, animals will commonly use force, or (30) of force, to decide which will stay and which will go. It is interesting to note, however, that animals seem to use the (31) amount of force necessary to drive away the (32) . There is usually no killing. In tile case of those animals which are (33) of doing each other great harm, there is a system for the (34) animal to show the winning animal that he wishes to (35) . When he shows this, the (36) normally stops fighting. Animals especially birds, which can easily escape from conflict seem to have no obstacle against killing, equally no mechanism (37) submission. The defeated bird simply flies away. However, if two doves are (38) in a cage, and they start fighting, they will continue to fight until one kills the other. We all think of the dove as a (39) of peace and, in its natural habitat,it is peaceful. But the" peace "mechanism does not (40) in a cage. 24().
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" Progress" was the watchword(口号) of the first two decades of the 20th Century. World-wide attempts to deal with rapid industrial growth brought changes in technology, ideas, and political and social institutions that were to shape the century.Advances in communication: the telegraph, radio, motion pictures, sped knowledge of events throughout cities and rural areas. Airplanes and automobiles widened the geographic boundaries of people’s lives. In December 1903, Orville and Wilbur Wright successfully flew the first powered heavier-than-air vehicle. In 1908 Henry Ford introduced his Model-T, a mass-produced automobile available at the affordable price of $ 850. In 1920, KDKA broadcast the first radio reporting of presidential election results.The Progressives who held political control in the US throughout the period worked to increase democratic participation in the government and other institutions. Through their social reform movements, they attempted to improve people’s lives by advocating prohibition of alcoholic beverages, the regulation of working conditions, and the improvement of living conditions. The booming cities were populated by immigrants who saw America as the land of opportunity. Immigration to the US reached its peak in 1907 with 12, 000 arrivals a day, but would continue to be an issue for Americans until the end of the century. Prohibition, legalized by the 18th Amendment in 1919, would challenge law enforcement officials into 1930s.Both Republican and Democratic parties pursued a progressive agenda from 1900 through 1920. Republicans Theodore Roosevelt and William H. Taft pressed for democratic reforms in local, state and national government, restrictions on business monopolies, and advocated social and economic benefits for American citizens. Democrat Woodrow Wilson advocated reforms in banking, tariffs, trusts and labor and sought the development of democracy internationally.Government and business became more democratic. Big business was a negative and positive force for change; industry’s treatment of workers created the pressure for labor reform; municipal governments modeled their management structures on business organizations. President Theodore Roosevelt led a campaign to" bust the trusts". On May 15,1911, the Supreme Court dissolved the monopoly of the Standard Oil Company.The people became more directly involved with government. The passage of the 17th Amendment to the Constitution in 1913 provided/’or the popular election of Senators. Women lobbied for and won a voice in government with the passage of the 19th Amendment to the Constitution on August 8,1920. Which of the following was not included as a purpose of social reform movements()
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The reason why studying the nature of human beings is popular is that.
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