National standards for paved roads were in place by 1921. [br] Service stations,

游客2023-08-03  20

问题 National standards for paved roads were in place by 1921. [br] Service stations, motels and restaurants promoted the development of the interstate highway system.

选项 A、Y
B、N
C、NG

答案 B

解析 第八段提到…it (the highway system) has led to the growth of spin-off industries like service stations, motels, restaurants, and shopping centers. 恰好和本题的因果关系相反。
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