2. 外语
  3. 　　 What might driving on an automated highway be like? The answer depends on what kind of system is ultimately adopted Two dist

　　 What might driving on an automated highway be like? The answer depends on what kind of system is ultimately adopted Two dist

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问题 　　  What might driving on an automated highway be like? The answer
depends on what kind of system is ultimately adopted Two distinctive                     【S1】________
types are on the drawing board. The first is a special-purpose lane system,
which certain lanes are reserved for automated vehicles. The second is a                 【S2】________
mixed traffic system; fully automated vehicles would share the road with
particularly automated or manually driving cars. A special-purpose lane                  【S3】________
system would require more expensive physical modifications to existing
highways, and it promises the greatest gains in freeway capacity.                        【S4】________
    Under either schemes, the driver would specify the desired,                          【S5】________
destination furnishing it to a computer in the car in the beginning of
the trip. If a mixed traffic system was in the place, automated driving                  【S6】________
could begin whenever the driver was on suitably equipped roads.
Whenever special-purpose lanes were available, the car could join                        【S7】________
existing traffic in two different ways. One method would use a special onramp.
As the driver approached the point of entry for the highway, devices
installed on the roadside would electronically check the vehicle to
determine their destination and to ascertain that it had the proper                      【S8】________
automation equipment in good working order.
    Either approach would harmonize the movement of new entering                         【S9】________
vehicles with those already traveling. Automatic control here should
allow smooth merging. And once a vehicle had settled into automated                      【S10】________
travel, the driver would be free to release the wheel, open the morning paper or just relax.
【S2】
选项
答案∧which→in或which→where
解析 关系词错误。本行的on the drawing board表示“在设计中”，没有错误。接下来一句介绍了第一个系统，其中which引导的非限定性定语从句中。主谓表已完整。which指代前文的system，在非限定性定语从句中作地点状语，因此它前面需加介词in或把它改为where。
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