C.show how much money controlling costs America
D.prove it is very expensive for some developed countries to control traffic
答案:D 写作意图题。根据第一段第一句“Controlling traffic is a complex and high cost problem in many developed countries.It becomes more difficult and costly...”可知,第二段写出了美国控制交通的费用就是为了证明这句话。故选D项。
33.What benefit can emergency workers get from the system developed by the CATT lab?
A.They can be safer.
B.They can reach an accident area faster.
C.They can get more advice from people.
D.They can share their information with others.
答案:B 细节理解题。根据第三段中的最后一句“He says the system is important to help emergency workers, or first responders reach an accident area faster.”可知,系统可以帮助急救人员更快到达意外事故区。故选B项。
34.Which of the following is NOT true about the developers and the students at the CATT?
A.They observe traffic flow continuously.
B.They develop software and applications.
C.They control the computer servers occasionally.
D.They change the information gathered into visual image.
答案:C 细节理解题。根据第五段中的“About 60 students and 30 software developers observe traffic flow and manage the computer servers at all times.”可知,学生们和软件开发师们一直观察交通流并管理着计算机服务器,并不是偶尔控制着服务器。故选C项。
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