2. 外语
  3. Pay and productivity, it is generally assumed, should be related. But the relationship seems to weaken【C1】_________people get ol

Pay and productivity, it is generally assumed, should be related. But the relationship seems to weaken【C1】_________people get ol

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问题     Pay and productivity, it is generally assumed, should be related. But the relationship seems to weaken【C1】_________people get older.
    Mental ability declines with age. That is the same for the brainy and the dim—and not【C2】_________for humans: it is measurable even for fruit flies. 【C3】_________minds that keep lively will suffer less than the lazy.   In general, the more education you have, the more productive your old【C4】_________will be.
    Some【C5】_________decline faster than others.  According to most studies, people’s numerical and reasoning abilities are at their best in their 20s and early 30s. 【C6】_________abilities—those that depend on knowledge—may improve with age.
    For most workers, decreased abilities will【C7】_________to lower productivity; only a minority will find know-how and knowledge outweighs their failing powers.  Even those employees who remain highly productive will be likely to shine only in a narrow【C8】_________.
    Academics notice this.  It is less clear that employers do.  Studies of supervisors-ratings show no clear correlation【C9】_________ age and perceived productivity. When other employees-views are【C10】_________into account though, the picture changes: these ratings suggest that workers in their 30s are the【C11】_________productive and hardworking, with scores falling thereafter.
    That is【C12】_________up by studies of work samples, which find lower productivity among the oldest employees.  A study for America’s Department of Labor showed job performance peaking at 35, and【C13】_________declining. It varied by industry: the fall was slower in footwear, but faster in furniture.
    Intellectual occupations are harder to measure, but the picture is the same. Academics seem to publish【C14】_________as they age.   Painters, musicians and writers show the same tendency. Their output peaks in their 30s and 40s.  The only【C15】_________is female writers, who are most productive in their 50s.
【C12】
选项
答案backed
解析 这句话意思为“对工作样本的研究发现老员工生产率低。这一研究支持了……”。back up是短语，意为“支持”。
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