1995年全国硕士研究生入学统一考试英语试题

Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of non-REM sleep. __41__ kind of sleep is at all well understood, but REM sleep is __42__ to serve some restorative function of the brain. The purpose of non-REM sleep is even more __43__. The new experiments, such as these __44__ for the first time at a recent meeting of the Society for Sleep Research in Minneapolis, suggest fascinating explanations __45__ of non-REM sleep.

For example, it has long been known that total sleep __46__ is 100 percent fatal to rats, yet, __47__ examination of the dead bodies, the animals look completely normal. A researcher has now __48__ the mystery of why the animals die. The rats __49__ bacterial infections of the blood, __50__ their immune systems -- the self-protecting mechanism against disease -- had crashed.

41. [A] Either

[B] Neither

[C] Each

[D] Any

42. [A] intended

[B] required

[C] assumed

[D] inferred

43. [A] subtle

[B] obvious

[C] mysterious

[D] doubtful

44. [A] maintained

[B] described

[C] settled

[D] afforded

45. [A] in the light

[B] by virtue

[C] with the exception

[D] for the purpose

46. [A] reduction

[B] destruction

[C] deprivation

[D] restriction

47. [A] upon

[B] by

[C] through

[D] with

48. [A] paid attention to

[B] caught sight of

[C] laid emphasis on

[D] cast light on

49. [A] develop

[B] produce

[C] stimulate

[D] induce

50. [A] if

[B] as if

[C] only if

[D] if only

1995年全国硕士研究生入学统一考试英语试题

41. [B] 42. [C] 43. [C] 44. [B] 45. [D]

46. [C] 47. [A] 48. [D] 49. [A] 50. [B]