Why does the author mention marine tourism？
A. To show how people's lives may be put in danger by the algae's growth.
B. To explain how human activities have encouraged the spread of Caulerpa taxifolia.
C. To contrast the impact on the tourism to what has happened in the commercial fishing industry.
D. To give an example of the effects that changed ecosystems have on humans.
查看答案
The word feasible in the passage is closest in meaning to
A. practical.
B. comprehensive.
C. firm.
D. routine.
According to Paragraph 3, how was the price of a film determined？
A. By the physical proportions of the film itself.
By the popularity of the film's content.
C. By the success of the film in the past.
D. By the distance exhibitors had to travel to buy it.
The word detrimental in the passage is closest in meaning to
A. harmful.
B. recent.
C. diverse.
D. worrying.
Based on the information in Paragraph 1 and Paragraph 2, what can be inferred about the cinematograph and the Vitascope projector？
A. They were greatly influenced by Edison's earlier inventions.
B. They both were very different from today's projection devices.
C. Their inventors worked together to create them.
D. They both made more money than the Kinetoscope had.
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