网址：http://m.1010jiajiao.com/timu3_id_3053386[举报]
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
测器) to keep it away from danger. It is powered entirely by the sun. Should we program the robot to
be equally active at all time? No.The robot would be using up energy at a time when it was not receiving
any. So we would probably program it to stop its activity at night and to wake up at dawn the next
morning.
According to the evolutionary (进化的) theory of sleep, evolution equipped us with a regular pattern
of sleeping and waking for the same reason.The theory doesn't deny that
sleep provides some important restorative functions. It merely says that evolution has programmed us to
perform those functions at a time when activity would be inefficient and possibly dangerous. However,
sleep protects us only from the sort of trouble we might walk into; it doesn't protect us from trouble that
comes looking for us. So we sleep well when we are in a familiar and safe place, but we sleep lightly, if at
all,when we fear that bears will nose into the tent.
The evolutionary theory explains the differences in sleep among creatures.Why do cats,for instance,
sleep so much,while horses sleep so little? Surely cats do not need five times as much repair and
restoration as horses do.But cats can afford to have long periods of inactivity because they spend little
time eating and unlikely to be attacked while they sleep. Horses must spend almost all their waking hours
eating, because what they eat is very low in energy value. Moreover,they cannot afford to sleep too long
or too deeply, because their survival depends on their ability to run away from attackers.
B.the reason why men need to sleep
C.about the need for robots to save energy
D.about the danger of men working at night
B. restore his bodily functions
C. prevent trouble that comes looking for him
D. keep up a regular pattern of life
B. need more time for restoration
C. spend less time eating to get enough energy
D. are unlikely to be attackers
B. The sleeping pattern of a living creature is determined by the food it eats.
C. Sleeping patterns must be taken into consideration in the designing of robots.
D. Evolution has equipped all creatures with a regular pattern of sleeping against waking.
阅读理解
阅读下列短文，从每题所给的四个选项中选出最佳选项。
Suppose we built a robot (机器人) to explore (探险) the planet Mars (火星). We provide the robot with seeing detectors to keep it away from danger. It is powered entirely by the sun. Should we program the robot to be equally active at all times? No. The robot would be using up energy at a time when it was not receiving any. So we would probably program it to stop its activity at night and to wake up at dawn the next morning.
According to the evolutionary (进化的) theory of sleep. evolution equipped us with a regular pattern of sleeping and waking for the same reason. The theory does not deny(否认)that sleep provides some important restorative functions(恢复功能). It tells us that evolution has programmed us to perform those functions at a time when activity would be inefficient and possibly dangerous. However, sleep protects us only from the sort of trouble we might walk into; it does not protect us from trouble that comes looking for us. So we sleep well when we are in a familiar, safe place, but we sleep lightly, if at all, when we fear that bears will nose into the tent.
The evolutionary theory explains the differences in sleep among creatures. Why do cats, for example, sleep so much, while horses sleep so little? Surely cats do not need five times as much repair and restoration as horses do. But cats can afford to have long periods of inactivity because they spend little time eating and are unlikely to be attacked while they sleep. Horses must spend almost all their waking hours eating, because what they eat is low in energy value. Moreover, they cannot afford to sleep too long or too deeply, because their survival depends on their ability to run away from attackers.
1．The writer uses the example of the robot in space exploration to tell us ________.
[ ]
A．the differences between man and robots
B．the reason why man needs to sleep
C．about the need for robots to save energy
D．about the danger of men working at night
2．Evolution has programmed man to sleep at night mainly to help him ________.
[ ]
A．avoid danger and ineffective labor
B．to restore his body functions
C．prevent trouble that comes looking for him
D．keep up a regular pattern of life
3．Cats sleep much more than horses partly because cats ________.
[ ]
A．are more active than horses when they are awake
B．need more time for restoration
C．are unlikely to be attackers
D．spend less time eating to get enough energy
4．Which of the following is the main idea of the passage?
[ ]
A．The sleeping pattern of a living creature is determined by the food it eats.
B．The study of sleep is an important part of the evolution.
C．Sleeping patterns must be taken into consideration in designing robots.
D．Evolution has equipped all creatures with a regular pattern of sleeping against waking.
查看习题详情和答案>>