31.According to the passage, which of the following correctly describes John Augustus Roebling?
A.He participated in the Civil War and was seriously wounded.
B.He was the first person to propose the construction of the bridge.
C.He was chosen to design the bridge because of his aggressive views.
D.He moved to America because he was discriminated against in his home country.
答案:D 细节理解题。由第三段最后一句话“He emigrated to America in 1830 to escape political discrimination.”可知。
D
(2016·河南百校联盟高三质监)
Controlling traffic is a complex and high cost problem in many developed countries.It becomes more difficult and costly with the ever-increasing number of cars on the roads.But scientists and students at the CATT, at the University of Maryland are working to solve this problem.They are using simulation(模拟) technologies to help government and private business control and react to changing traffic conditions.
The online economics magazine Forbes.com says traffic congestion(拥挤) cost Americans $ 124 billion in 2017 and that number could rise to $ 186 billion by 2030.
But scientists at the CATT lab are trying to reduce those costs.They are developing a system that helps traffic managers, planners, emergency workers and businesses plan and react better.Michael Pack is CATT director.He says the system is important to help emergency workers, or first responders reach an accident area faster.
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