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英语四级考试真题阅读理解精练含答案(11)

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发表于 2017-11-25 18:30:03 | 显示全部楼层 |阅读模式
  Passage One
          Questions 46 to 50 are based on the following passage.
          Declining mental function is often seen as a problem of old age,but certain
aspects of brain function actually begin their decline in young adulthood, a new
study suggests.
          The study, which followed more than 2,000 healthy adults between the ages
of 18 and 60, found that certain mental functions—including measures of abstract
reasoning, mental speed and puzzle-solving—started to dull as early as age
27.
          Dips in memory, meanwhile, generally became apparent around age 37.
          On the other hand, indicators of a person’s accumulated knowledge—like
performance on tests of vocabulary and general knowledge—kept improving with
age, according to findings published in the journal   Neurobiology of Aging.
          The results do not mean that young adults need to start worrying about
their memories. Most people’s minds function at a high level even in their later
years, according to researcher Timothy Salthouse.
          "These patterns suggest that some types of mental flexibility decrease
relatively early in adulthood, but that the amount of knowledge one has, and the
effectiveness of integrating it with one’s abilities,may   increase throughout
all of adulthood if there are no dispases," Salthouse said in a news
release.
          The study included healthy, educated adults who took standard tests of
memory, reasoning and perception at the outset and at some point over the next
seven years.
          The tests are designed to detect subtle (细微的)changes in mental function,
and involve solving Puzzles, recalling words and details from stories, and
identifying patterns in collections of letters and symbols.
          In general, Salthouse and his colleagues found, certain aspects of
cognition (认知能力)generally started to decline in the late 20s to 30s.
          The findings shed light on normal age-related changes in mental function,
which could aid in understanding the process of dementia(痴呆),according to the
researchers.
          “By following individuals over time,” Salthouse said, "we gain insight in
cognition changes, and may possibly discover ways to slow the rate of
decline.”
          The researchers are currently analyzing, the study participants' health and
lifestyle to see which factors might influence age-related cognitive
changes.
          46.What is the common view of mental function?
          A.It varies from person to person.
          C.It gradually expands with age.
          B.It weakens in one’s later years.
          D.It indicates one’s health condition.
          47.What does the new study find about mental functions?
          A.Some diseases inevitably lead to their decline.
          B.They reach a peak at the age of 20 for most people.
          C.They are closely related to physical' and mental exercise.
          D.Some of them begin to decline when people are still young.
          48.What does Timothy Salthouse say about people's minds in most cases?
          A.They tend to decline in people’s later years.
          B.Their flexibility determines one’s abilities.
          C.They function quite well even in old age.
          D.Their functioning is still a puzzle to be solved.
          49.Although people’s minds may function less flexibly as they age,
they_____.
          A.may be better at solving puzzles
          B.can memorize things with more ease
          C.may have greater facility in abstract reasoning
          D.can put what they have learnt into more effective use
          50.According to Salthouse, their study may help us_____.
          A.find ways to slow down our mental decline
          6.find ways to boost our memories
          C.understand the complex process of mental functioning
          D.understand the relation between physical and mental health
          参考答案:
          46. 正确选项B。It weakens in one’s later years.
          47. 正确选项D。Some of them begin to decline when people are still young.
          48. 正确选项C。They function quite well even in old age.
          49. 正确选项D。can put what they have learnt into more effective use.
          50. 正确选项A。find ways to slow down our mental decline.
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