单选题：According to the passage, traffic accidents may be regarded

题目分类：卫生类
题目类型：单选题
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题目内容：

According to the passage, traffic accidents may be regarded as a social problem because __________. A．autos have become most destructive to mankind
B．people usually pay little attention to law and morality
C．civilization brings much harm to people
D．the lack of virtue is becoming more severe

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答案解析：

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