题目内容
Suppose we built a robot to explore the planet Mars. We provide the robot with seeing detectors(探测器) to keep it away from danger. It is powered entirely by the sun. Should we program the robot to be equally active at all 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 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 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 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 explain 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 are 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.
1. The author uses the example of the robot in space exploration to tell us _______.
A. the differences between robots and men
B. the reason why men need to sleep
C. about the need for robots to save power
D. about the danger of men working at night
2. Evolution has programmed man to sleep at night chiefly to help him ______.
A. keep up a regular pattern of life
B. prevent trouble that comes looking for him
C. avoid danger and inefficient labor
D. restore his bodily functions
3. Which of the following is the main idea of the passage?
A. Evolution has equipped all creatures with a regular pattern of sleeping and waking.
B. The study of sleep is an important art of the evolutionary theory.
C. Sleeping patterns must be taken into consideration in the designing of robots.
D. The sleeping pattern of a living creature is determined by the food it eats.
1--3 BCA
解析:
本文介绍了有关睡觉进化论方面的知识。
1. B。推断题。根据文章第2段第1句evolution equipped us with a regular pattern of sleeping and waking for the same reason可推知此题答案为B。
2. C。推断题。根据文章第2段第3句when activity would be inefficient and possibly dangerous可推知此题答案为C。
3. A。推断题。根据文章第2段第1句和第3段第1句可推知此题答案为 A。
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It was Saturday. As always, it was a busy one, for “Six days shall you labor and all your work” was taken seriously back then. Outside, Father and Mr. Patrick next door were busy chopping firewood. Inside their own houses, Mother and Mrs. Patrick were engaged in spring cleaning.
Somehow the boys had slipped away to the back lot with their kites. Now, even at the risk of having brother caught to beat carpets, they had sent him to the kitchen for more string(线). It seemed there was no limit to the heights to which kites would fly today.
My mother looked at the sitting room, its furniture disordered for a thorough sweeping. Again she
cast a look toward the window. “Come on, girls! Let’s take string to the boys and watch them fly the kites a minute.”
On the way we met Mrs. Patric, laughing guiltily as if she were doing something wrong, together with her girls. There never was such a day for flying kites! We played all our fresh string into the boys’ kites and they went up higher and higher. We could hardly distinguish the orange-colored spots of the kites. Now and then we slowly pulled one kite back, watching it dancing up and down in the wind, and finally bringing it down to earth, just for the joy of sending it up again.
Even our fathers dropped their tools and joined us. Our mothers took their turn, laughing like schoolgirls. I think we were all beside ourselves. Parents forgot their duty and their dignity; children forgot their everyday fights and little jealousies. “Perhaps it’s like this in the kingdom of heaven,” I thought confusedly.
It was growing dark before we all walked sleepily back to the housed. I suppose we had some sort of supper. I suppose there must have been surface tidying-up, for the house on Sunday looked clean and orderly enough. The strange thing was, we didn’t mention that day afterward. I felt a little embarrassed. Surely none of the others had been as excited as I. I locked the memory up in that deepest part of me where we keep “the things that cannot be and yet they are.”
The years went on, then one day I was hurrying about my kitchen in a city apartment, trying to get some work out of the way while my three-year-old insistently cried her desire to “go park, see duck.” “I can’t go!” I said. “I have this and this to do, and when I’m through I’ll be too tired to walk that far.”
My mother, who was visiting us, looked up from the peas she was shelling. “It’s a wonderful day,” she offered, “really warm, yet there’s a fine breeze. Do you remember that day we flew kites?”
I stopped in my dash between stove and sink. The locked door flew open and with it a rush of memories. “Come on,” I told my little girl. “You’re right, it’s too good a day to miss.”
Another decade passed. We were in the aftermath(余波) of a great war. All evening we had been asking our returned soldier, the youngest Patrick Boy, about his experiences as a prisoner of war. He had talked freely, but now for a long time he had been silent. What was he thinking of --- what dark and horrible things?
“Say!” A smile sipped out from his lips. “Do you remember --- no, of course you wouldn’t. It probably didn’t make the impression on you as it did on me.”
I hardly dared speak. “Remember what?”
“I used to think of that day a lot in POW camp (战俘营), when things weren’t too good. Do you remember the day we flew the kites?”
【小题1】Mrs. Patrick was laughing guiltily because she thought________.
| A．she was too old to fly kites |
| B．her husband would make fun of her |
| C．she should have been doing her housework |
| D．her girls weren’t supposed to the boy’s games |
| A．felt confused | B．went wild with joy |
| C．looked on | D．forgot their fights |
| A．The boys must have had more fun than the girls. |
| B．They should have finished their work before playing. |
| C．Her parents should spend more time with them. |
| D．All the others must have forgotten that day. |
| A．She suddenly remembered her duty as a mother. |
| B．She was reminded of the day they flew kites. |
| C．She had finished her work in the kitchen. |
| D．She thought it was a great day to play outside. |
| A．the writer was not alone in treasuring her fond memories |
| B．his experience in POW camp threw a shadow over his life |
| C．childhood friendship means so much to the writer |
| D．people like him really changed a lot after the war |