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单项选择题
According to the passage, the smart-highway technology is aimed to ______.
A．develop sophisticated facilities on the interstate highways
B．accelerate the speed of the transportation
C．optimize the highway capabilities
D．improve communication between drivers and the traffic monitors
单项选择题
According to Larson, to redress the traffic problem, ______.
A．rapid mass transit system must be introduced
B．overall strategies must be experimented
C．a fundamental shift of notions must be taken
D．a better understanding of the root of traffic problems must be reached
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