One of the most important results of research into ageing has been to pinpoint the significance of short-term memory. This facul

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问题     One of the most important results of research into ageing has been to pinpoint the significance of short-term memory. This faculty is easily (1)_____ as ageing advances. What seems to (2)_____ is that information is received by the brain, (3)_____ scans it for meaning in order to decode it at some future time. It looks as if the actual (4)_____ of the short-term memory itself may not change too much (5)_____ age. A young man and a man in his late fifties may (6)_____ be able to remember and repeat a(n) (7)_____ of eight numbers recited to them. But what (8)_____ change is that when the older man is asked to remember anything (9)_____ between the time he is first given the numbers to memorize and the time he is asked to (10)_____ them, he will be much less likely to remember the (11)_____ numbers than the young man. This is because the scanning stage is more easily (12)_____ by other activities in (13)_____ people.
    In (14)_____ living one experiences this as a fairly minor (15)_____—a telephone number forgotten while one looks (16)_____ an area code, or the first part of (17)_____ street directions confused with the last because the last ’turn lefts’ and ’turn rights’ have interfered (18)_____ remembering the first directions. In more formal learning, however, the (19)_____ of short-term memory is more than just a mild social embarrassment. It can be a serious bar to further (20)_____ or indeed to any progress at all.


选项 A、up
B、for
C、at
D、over

答案A

解析 此空白处的语境为:在日常生活中,人们经历这样的事情而不把它当成一回事:在查一个电话区号的时候,却把电话号码给忘了。"look up"和"look at"可能性大。look up意为"查阅",尤指为了得到某种信息而查阅资料,比如查字典等;look at指普通意义的"看,看到"。文中说的是查阅区号这件事情的"干扰",使他们忘记了电话号码,而不是说正在看电话簿的过程中忘记了电话号码,故up正确,at错误。look for是指普通意义的寻找,表示"查阅"含义时一般不用它。look over是指粗略的检查,不能用在查阅资料方面。
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