单选题：Howmanyyearsofliveshavebeenincreasedbytobaccocontrolformenat

题目内容：

Howmanyyearsofliveshavebeenincreasedbytobaccocontrolformenatage40accordingtotheresearchers? A．19.6years.
B．7.8years.
C．5.4years.
D．2.3years.

参考答案：

答案解析：

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Theultimategoalofstudyingliteratureorphilosophyistolearnhowtoliveone'slife.

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Nationswhoinvestmoreonitskidsareprobablygoingtowininanintensivelycompetitiveglo

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Today,theratioofthespendingonanelderlytothatonakidisseventoone.

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