Why does the author use the term golden age in discussing Greek civilization in the fifth century BC？

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• Why does the data communication industry use the layered OSI reference model (Choose two.)（）。

  A . It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting. B . It enables equipment from different vendors to use the same electronic components, thus saving research and development funds. C . It supports theevolution of multiple competing standards, and thus provides business opportunities for equipment manufacturers. D . It encourages industry standardization by defining what functions occur at each layer of the model. E . It provides a means by which changes in functionality in one layer require changes in other layers.

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• Why does the name Joe trouble the author as a writer?The name troubles the author because .

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• Q: Why does the author say his observations are rather convincing?

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• Why does the author quote the words about war in the prologue

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• Why does the author think it is wrong to believe that “the public speaker is a specially gifted individual” (Para. 4)?

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• 8. Why does the author mention the Sierra Nevada in line 17?

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• Why does the author mention antiques in the third paragraph?

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• Why does the author mention the psychological condition of the driver in Paragraph Three？ 查看材料

  A.To give an example of the various reasons for road accidents. B.To show how important it is for drivers to be emotionally healthy. C.To show some of the inaccurate estimations by researchers. D.To illustrate the hidden tensions in the course of driving.

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• Why does the author mention bees，ants，toads，and turtles in the last paragraph？ 查看材料

  A.To describe some unusual kinds of pets． B.To measure distances trailed by various animals． C.To compare their home-finding abilities with those of homing pigeons． D.To interest the reader in learning about other animals．

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• Why does the author mention CBS news on the French television？

  A．To indicate that watching news is common in the evening. B．To explain America's cultural invasion of France. C．To give an example of the acceptance of American culture. D．To show that France has submitted to America.

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• Why does the author long for the U.S. 's support for European integration？

  A．Because this is the need of both sides' interests. B．Because the U. S. has long had a good relationship with Europe. C．Because the U. S. always takes its role in global leadership. D．Because this could help build a strong partnership.

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• Why does the author say space projects are practical？

  A.Because they make science exciting. B.Because they promote economic growth. C.Because they increase Americas national power. D.Because they show what technology can bring.

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• Why does the author mention "the Louisiana Purchase"？

  A．To demonstrate how the westward expansion of the United States came about. B．To illustrate Washington's contribution to the evolution of the United States. C．To explain why Jefferson was chosen to be one of the presidents on Mount Rushmore. D．To show why Jefferson's inclusion on Mount Rushmore was a contentious issu

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• Why does the author compare rain forests with coral reefs？

  A.They ale approximately the same size． B.They shale many similar species． C.Most of their inhabitants require water． D.Both have many different forms of life．

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• Why does the author say that the knowledge of the shapes and habits of wild animals was important to our ancestors？

  A．Because they loved animals so much. B．Because animals were the frequent subject of their paintings. C．Because they needed them to form. a religion. D．Because they wanted to live in safety, preventing themselves from being hurt by animals. 此题为多项选择题。

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• Why does the author start with the car, industry before he focuses on tablet market？

  A．Because he treats the car industry as the key point for his writing. B．Because the car industry is more important than table market. C．Because he uses the car analogy for a more effective argumentation. D．Because the model of the car is far more popular in the market.

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• Why does the author mention "Indian mustard"？

  A．To warn about possible risks involved in phytoremediation B．To help illustrate the potential of phytoremediation C．To show that hyperaccumulating plants grow in many regions of the world D．To explain how zinc contamination can be reduced

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• 5.Why does the author feel somewhat guilty?

  A.Herealizesthereisagreatdividebetweenhislifeandthatofblue-collarworkers. B.Helooksdownuponthemechanicalworkattheassemblyline. C.Hehasnotdonemuchtohelphisco-workersatthefactory. D.Hehasstayedatschooljustforthepurposeofescapingfromtherealworld.

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• Why does the author discuss carbon dioxide's relationship to global warming in Paragraph 5？

  A．To illustrate methane's molecular structure. B．To show the link between global warming and smog. C．To suggest that fossil fuels should not be burned. D．To elaborate on a benefit of natural gas's cleanliness.

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• Why does the author use the phrase "Quartz is quartz"？

  A．To describe how the differences between Pleistocene and Cambrian quartz reveal information about dating rocks B．To point out that the chemical composition of quartz makes it more difficult to date than other rocks C．To provide an example of how regional differences in rock sequences can make a particular rock difficult to date D．To explain that rocks are difficult to use for dating because their chemical compositions always remain the same over time

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• Why does the author mention Native American and Aborigine groups in paragraph 3？

  A．To give examples of modern groups in which women participate in net hunting B．To demonstrate how net hunting should be carried out in modern societies C．To describe net hunting techniques that protect the women in the group D．To contrast their net hunting techniques with those of the people in the Congo

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• Why does the author mention mosquitoes and fleas in paragraph 5？

  A．Because they are the origin of the myxoma virus B．Because they carry the myxoma virus to other animals C．Because they die when they are infected by myxoma D．Because they have an immunity to the myxoma virus

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• Why does the author mention "there is wide-spread uneasiness and confusion"（Para. 1)？_____

  Why does the author mention "there is wide-spread uneasiness and confusion"(Para. 1)？______ A．The abundant food supply is not expected to last B．Britain is importing less food C．Despite the abundance, food prices keep rising D．Britain will cut back on its production of food

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• Why does the author fight with her boyfriend online （）

  A．Because their typed dialogue online can cause misinterpretation． B．Because the computer keeps crashing． C．Because her boyfriend lacks emotional care for her．

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