B.God helps those who help themselves.
C.Where there is a will, there is a way.
D.Actions speak louder than words.
答案:A 推理判断题。文章故事告诉我们:善行能给人快乐。
D
(2016·河南百校联盟高三质监)
Controlling traffic is a complex and highcost problem in many developed countries.It becomes more difficult and costly with the everincreasing 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.
The CATT Lab collects information from many sources, including roadside devices, GPS (global positioning system) equipment and wireless phones.
About 60 students and 30 software developers observe traffic flow and manage the computer servers at all times.They also work to develop software and applications that can help traffic run smoother and safer. Some of them turn the information gathered into socalled “visualizations”.These visual representations help emergency workers better understand what is happening.
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