1. After the national speed limit of 55 miles per hour was imposed in 1974, the

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试卷: TS Critical Thinking 20 题 No2


[单选题]

1. After the national speed limit of 55 miles per hour was imposed in 1974, the number of deaths per mile driven on a highway fell abruptly as a result. Since then, however, the average speed of vehicles on highways has risen, but the number of deaths per mile driven on a highway has continued to fall.
Which of the following conclusions can be properly drawn from the statements above?

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