题目内容
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.
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| 阅读理解。 | |
| Su Hua is studying at Cambridge, UK. She has bought a bicycle and is worried about security (安全). Her friend, Kate, found this article and sent it to her.
| |
| 1. Which part of the text gives you information on how to lock up your bicycle when you leave it? | |
| A. Locks. B. Marking. C. Registration. D. Basic Security. | |
| 2. The underlined phrase "act as a deterrent to a thief" means ______. | |
| A. help you recognize your bike B. help the police find your bicycle C. stop someone stealing your bicycle D. stop you worrying about your bike | |
| 3. The article advises you to keep a record of your bicycle _______. | |
|
A. in the bike shop and your computer | |
| 4. The main purpose of this article is _________. | |
| A. to tell you what to do if your bicycle is stolenB. to suggest ways of keeping your bicycle safe C. to give you advice on where to buy a good lock D. to say why you shouldn't keep your bicycle in a quiet place |
| 阅读理解。 | ||
| Su Hua is studying at Cambridge, UK. She has bought a bicycle and is worried about security (安全). Her friend, Kate, found this article and sent it to her.
| ||
| 1. Which part of the text gives you information on how to lock up your bicycle when you leave it? | ||
|
A. Locks. | ||
| 2. The underlined phrase “act as a deterrent to a thief” means ______. | ||
| A. help you recognize your bike B. help the police find your bicycle C. stop someone stealing your bicycle D. stop you worrying about your bike | ||
| 3. The article advises you to keep a record of your bicycle _______. | ||
| A. in the bike shop and your computer B. in the police station and a security company C. in a security company and your university D. by yourself and in a security company | ||
| 4. The main purpose of this article is ______. | ||
| A. to tell you what to do if your bicycle is stolen B. to suggest ways of keeping your bicycle safe C. to give you advice on where to buy a good lock D. to say why you shouldn’t keep your bicycle in a quiet place |
| 阅读理解。 | |
| Su Hua is studying at Cambridge, UK. She has bought a bicycle and is worried about security (安全). Her friend, Kate, found this article and sent it to her.
| |
| 1. Which part of the text gives you information on how to lock up your bicycle when you leave it? | |
| A. Locks. B. Marking. C. Registration. D. Basic Security. | |
| 2. The underlined phrase "act as a deterrent to a thief" means _____. | |
| A. help you recognize your bike B. help the police find your bicycle C. stop someone stealing your bicycle D. stop you worrying about your bike | |
| 3. The article advises you to keep a record of your bicycle ______. | |
| A. in the bike shop and your computer B. in the police station and a security company C. in a security company and your university D. by yourself and in a security company | |
| 4. The main purpose of this article is _____. | |
| A. to tell you what to do if your bicycle is stolen B. to suggest ways of keeping your bicycle safe C. to give you advice on where to buy a good lock D. to say why you shouldn't keep your bicycle in a quiet place |