What were some of the factors that contributed to the tulip craze in the Netherlands in the seventeenth century？ Choose 3 answers.
A. Wealthy gardeners liked to compete for rare plants.
B. The number of people with disposable income was growing.
C. Tulip bulbs were initially cheap and easy to obtain.
D. Tulips in the wild bloomed in unusual color combinations.
E. The tulip market was not regulated by the government.
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Why does the professor mention a merchant who ate tulip bulbs？
A. To explain how the Turks introduced the flower to European visitors
B. To explain what happened to tulip bulbs that did not produce desirable colors
C. To give an example of one way that the rich in the Netherlands showed off their wealth
D. To illustrate her point that Europeans were unfamiliar with the flower
What is the main purpose of the talk？
A. To show what happens after an economy has experienced a boom-and-bust cycle
B. To illustrate the conditions needed to produce a boom-and-bust cycle
C. To demonstrate how boom-and-bust cycles have changed over time
D. To explain why the boom-and-bust cycle is not a frequent historical occurrence
What does the woman say is a good way for the student to prepare for speaking to companies
A. Take some business classes
B. Familiarize himself with certain businesses beforehand
C. Have questions ready to ask the representatives
D. Talk to people who work for accounting firms
现场实验的优点是容易保持实验结果的内部有效性。()
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