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Maybe it''s a sign of a mature mind when some of life''s bigger questions-about love, faith, ambition-suddenly seem more manageable than smaller ones, such as:Why did I just open the refrigerator? Where on earth did I put my keys? Where did I write down that phone number?
Our capacity for storing and recalling information does not stream down like sand through an hourglass, as neurologists once believed. On the contrary, new research suggests that, when stimulated in the right way, brains of almost any age can give birth to cells and forge fresh pathways to file away new information. This emerging picture has not only encouraged those who treat and care for the 5% of older adults who have dementia (痴呆症) such as Alzheimer''s disease, but also generated a wave of optimism among those studying memory changes in the other 95%, as well as an increasing public fascination with "memory enhancement" dietary supplements, books and brain-improving techniques.
The slight failures of memory that many of us attribute to a failing brain are often due to something entirely different: anxiety, sleep problems, depression, even heart disease. The biological nuts and bolts of learning and memory in fact change little over time in healthy people, researchers say. "There''s very little cell loss, and structurally all the machinery is there, even very late in life," said a neuroscientist Greg Cole. It''s the cells'' speed and ability to send and receive signals that diminish gradually, which is what makes the mind go blank when trying to recall familiar words and names.
For more than a decade, researchers have known that people who have active, intellectually challenging lives are less likely to develop dementia than those who do not. Part of this difference is attributable to intelligence, some doctors believe:The more you start with, the longer it takes to lose it. And new evidence suggests that the act of using your brain is in itself protective, no matter who you are.
All of the activities, such as reading newspapers, watching TV, playing games, etc. canimprove people''s scores on standard tests measuring recall of numbers and names, experts say. They also acknowledge, however, that there is a big difference between playing chess with a friend and doing a mental exercise, such as memorizing numbers. One is an organic part of a person''s life, the other a purely intellectual exercise, done in isolation. The first is fun; the second, often, is a tiring task.
单选题
According to the text,adult persons usually
【正确答案】
D
【答案解析】 Maybe it''s a sign of a mature mind when some of life''s bigger questions-about love, faith, ambition-suddenly seem more manageable than smaller ones, such as:Why did I just open the refrigerator? Where on earth did I put my keys? Where did I write down that phone number?
Our capacity for storing and recalling information does not stream down like sand through an hourglass, as neurologists once believed. On the contrary, new research suggests that, when stimulated in the right way, brains of almost any age can give birth to cells and forge fresh pathways to file away new information. This emerging picture has not only encouraged those who treat and care for the 5% of older adults who have dementia (痴呆症) such as Alzheimer''s disease, but also generated a wave of optimism among those studying memory changes in the other 95%, as well as an increasing public fascination with "memory enhancement" dietary supplements, books and brain-improving techniques.
The slight failures of memory that many of us attribute to a failing brain are often due to something entirely different: anxiety, sleep problems, depression, even heart disease. The biological nuts and bolts of learning and memory in fact change little over time in healthy people, researchers say. "There''s very little cell loss, and structurally all the machinery is there, even very late in life," said a neuroscientist Greg Cole. It''s the cells'' speed and ability to send and receive signals that diminish gradually, which is what makes the mind go blank when trying to recall familiar words and names.
For more than a decade, researchers have known that people who have active, intellectually challenging lives are less likely to develop dementia than those who do not. Part of this difference is attributable to intelligence, some doctors believe:The more you start with, the longer it takes to lose it. And new evidence suggests that the act of using your brain is in itself protective, no matter who you are.
All of the activities, such as reading newspapers, watching TV, playing games, etc. canimprove people''s scores on standard tests measuring recall of numbers and names, experts say. They also acknowledge, however, that there is a big difference between playing chess with a friend and doing a mental exercise, such as memorizing numbers. One is an organic part of a person''s life, the other a purely intellectual exercise, done in isolation. The first is fun; the second, often, is a tiring task.
单选题
According to new research, it''s distinct that
单选题
Experts suggest that the best way to avoid memory failures is
【正确答案】
B
【答案解析】由题干中的关键词“Experts”“the best way to avoid memory failure”可知，此题出自文章末段。该段提到改善记忆的一些脑力activities(活动)，但未提到 dietary supplements(食用补品)和intellectual occupation(智力工作)，故A、C两项可以排除。D项只是脑力活动的一种。B项“使脑力机能保持活跃”最为概括、全面，答案非它莫属。
单选题
The phrase "nuts and bolts" in Par. 3 most probably means
【正确答案】
D
【答案解析】nuts and bolts直译是“螺母和螺栓”，作惯用短语，意为“基本的东西”，“运转部件”，此处指进行学习和记忆的生物器官。据此，只有D项为正确答案。
单选题
As asserted by researchers, our inability to memorize words or names mainly