我国“乐活族”正在悄然发展壮大。“乐活”是近年来出现的一个新词，由“life styles of health and sustainability”的第一个字母组成，直译就是“健康可持续性的生活方式

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我国“乐活族”正在悄然发展壮大。“乐活”是近年来出现的一个新词，由“life styles of health and sustainability”的第一个字母组成，直译就是“健康可持续性的生活方式”。“乐活族”在消费时，会考虑到自己和家人的健康以及对生态环境的责任心。“乐活族”的出现表明
①人们对精神消费的需求越来越高 ②生产决定消费水平和消费方式
③人们在消费过程中注重商品和服务的品质 ④人们的消费行为日趋成熟、理性

A：①④　　　

B：②③

C：③④　　

D：①②

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C

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    When you feel sad, tears will come down from your eyes. When you are happy, especially when you laugh hard, tears will also come down from your eyes. But tears have a more important job than showing your feelings.
    Tears keep your eyes clean and healthy. They wash away dirt and germs(细菌) just like bath. Your eyes also need tears to keep them wet. And eyes must be wet so that they can move smoothly. Your eyes are busy looking here and there all day long. They move quickly from one thing to another. If you didn't have tears, your eyes couldn't move, and soon you would be blind.
    Maybe you don't like tears, but your eyes can't do without them.

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