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填空题根据下面资料，回答题
Pay and productivity, it is generally assumed, should be related. But the relationship seems to weaken (21 ) _____people get older.
Mental ability declines with age. That is the same for the brainy and the dim--and not(22) _____for humans: it is measurable even for fruit flies. (23)_____ minds that keep lively will suffer less than the lazy. In general, the more education you have, the more productive your old (24) _____will be.
Some (25) _____decline faster than others. According to most studies, people´s numeri-cal and reasoning abilities are at their best in their 20s and early 30s. (26) _____ abilities--those that depend on knowledge--may improve with age.
For most workers, decreased abilities will (27) _____to lower productivity; only a minor-ity will find know-how and knowledge outweighs their falling powers. Even those employees who remain highly productive will be likely to shine only in a narrow (28)_____
Academics notice this. It is less clear that employers do. Studies of supervisors-ratings show no clear correlation (29) _____ age and perceived productivity. When other employees-views are (30)_____into account though, the picture changes: these ratings suggest that workers in their 30s are the (31) _____productive and hardworking, with scores falling thereafter.
That is (32)_____ 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 pea-king at 35, and (33) _____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 (34) _____as they age. Painters, musicians and writers show the same tendency.
Their output peaks in their 30s and 40s. The only (35) _____is female writers, who are most productive in their 50s.
第21题答案
参考答案暂无
解析:参考译文
人们普遍认为工资和生产率应该是相关的。但随着人的变老，这种关系似乎在减弱。
心理能力随着年龄而下降。不管是大脑聪明的人还是愚笨的人这都是一样的。这不仅仅是对人类来说的。即使是在果蝇身上也是可测量的。
但是，活跃的大脑会比懒散的大脑受到的影响要小。在一般情况下，你受到的教育越多，年老时你就会越富有。
有些能力下降比其他的要快。根据多数研究，人们的数字和推理能力表现最好的时候是在他们二三十岁左右。那些依赖于知识的其他能力，可能随着年龄增长而提高。
对于大多数的工人，能力下降会导致生产力下降，只有少数人能找到诀窍和知识远远超过他们下降的能力。即使是那些保持高生产力的员工将有可能只在一个狭窄的领域里发光。
学者注意到这一点。雇主对于这是不太清楚的，关于主管评级的研究表明年龄和认知生产率之间没有明显的相关性。当其他员工的意见都被考虑到时，画面变化了：这些评级表明，工人在30多岁时生产效率最高并工作最努力，之后其分数会随之下降。
对工作案例的研究支持了这一说法，研究发现老员工生产率低。美国劳工部门研究显示工作绩效峰值为35岁，然后开始下降。它因行业不同而不同：下跌较缓慢的是鞋类生产行业，较快的是家具行业。
智商更高的职业是难以衡量的，但数据图是一样的。学者似乎很少公布他们的年龄。画家、音乐家和作家也表现出同样的趋势。他们的输出峰值也出现在30多岁和40多岁。唯一的饲外是女性作家，其输出峰值出现在50多岁。
答案及解析
as【解析】此空上一句意为：“人们普遍认为工资和生产率应该是相关的。”下一句意为：“但是这种关系在减弱…人们在变老。”可知缺少连词，引导时间状语从句，主句和从句动作同时发生，应填as，意为“随着…”。