• 2022-06-19
    36. The year when most Americans began using smartphones was identified as a turning point in young Americans' level of happiness.
    未知类型:{'label': 'questionDesc', 'content': '请选出题干中适合作定位词的内容。', 'isMemberControl': 0, 'type': 181}
    未知类型:{'label': 'source', 'content': '2019年12月 六级 卷一 信息匹配Increased Screen Time and Wellbeing Decline in Youth', 'isMemberControl': 0, 'type': 181}
    A: most Americans
    B: smartphones
    C: identified
    D: a turning point
    E: young Americans’
    F: level of happiness
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