托福听力经典加试鸟类迁徙Bird migration

题目：

问题一：Why does the student go to see the professor?

答案：(C)he cannot find enough material in writing his paper.

问题二：How does the professor help the student?

答案：(A)建议学生改变论文方向。

问题三：What information will the man probably include in his paper (choose two answers)

答案：(B)analysis(D)focus on one topic

问题四：Why does the student 提到birds migrate at night?

答案：(A)通过说这个topic来验证自己理解了老师的意图he understands what the teacher said.

问题五：Listen again to part of the conversation. Then answer the question.

S: Well, I wanted to write about bird migration, but I'm having trouble finding enough sources.

P: You're having trouble finding sources on bird migration

What does the professor imply when she says this: "You're having trouble finding sources on bird migration... "

答案：(B)教授认为找资料很容易

背景知识补充：

这篇听力内容，虽然是一般教授与同学讨论论文内容的长对话，不过值得注意的是，动物迁徒，包括动物、鸟类、昆虫、甚至鱼类等，生物对栖息地迁徒相关内容，一直不断出现在新托福iBT考题中，无论在听、说、读、写都曾出现相关考题，因此备考新托福的同学，应该对动物迁徒有一定的认识。

相关文章：

Migration Birds Know No Boundaries (鸟类迁徙无边界)

¨ The migration of birds is one of the most fascinating and least understood events in nature.

¨ Arctic terns are the champions of long-distance migration. They fly about 11,000 miles (17,700 kilometers) from their breeding grounds in the Arctic to their winter home in the Antarctic.

Why birds migrate (为什么鸟类迁徙)

¨ In many parts of the world, the foods that birds eat become scarce during certain seasons of the year. Most birds would starve if they had to remain in such places through the unfavorable season.

¨ Although birds migrate to survive, the factors that actually trigger their migrations are much more difficult to explain. For example, many northern species leave their summer home while the weather is still warm and the food supply plentiful.

¨ Bird migrations are probably regulated by the glandular system. The glands produce chemical substances called hormones.

¨ Changes in hormone production stimulate the birds to migrate. Among some northern species, hormone production is affected by the length of daylight. As the daylight hours shorten, hormonal changes cause the birds to prepare for their migratory flight south.

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