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A study of sleep in sparrows suggests the relationship between sleep and the ability to learn may be more complicated(复杂) than people knew.
Niels C·Rattenborg, a scientist from Wisconsin-Madison, wanted to find out how the sparrows were able to deal with getting so much less sleep. He and his team brought eight wild birds into a lab and watched them for one year. They invented a game to check how well the birds could learn. In the game, the sparrows had to peck(啄)three buttons （按钮）in a right order to get a food treat. The scientists discovered that the birds’ ability to learn the right button order depended on(依靠)two things: the time of year and the amount of sleep the birds had had.
During the migration（迁徙）season, the sparrows were restless at night and got much less sleep than usual. Even so, they were able to understand how to get the food quickly as if they’d had a regular night of sleep. Outside the migration season, they found the sparrows that got less sleep than usual had much more difficulty learning how to get the food treats than birds that had a regular sleep.
The results show that the sparrows can deal with much less sleep during the migration season than usual. If scientists can find out why, they may learn from sparrows and find ways of helping people deal with getting much less sleep. Until scientists fully understand the relationship between sleep and learning, it’s better to get plenty of sleep when preparing for an exam.
小题1:The passage is mainly about .| A．sparrows’ migration. |
| B．sleep lessons from Sparrows. |
| C．how to get less sleep while studying |
| D．how sparrows that got less sleep get food treats |
小题2:Why can sparrows get much less sleep during the migration season?| A．They eat more. |
| B．The climate is better |
| C．They can get food quickly |
| D．Scientists still don’t know the reason. |
小题3:What fact does the passage lead you to believe?| A．We should sleep as little as sparrows do. |
| B．We should get enough sleep before an exam. |
| C．When tired, we should try to focus on(聚焦) our study. |
| D．When tired, we should check how we can sleep less than usual. |
Do you know who invented tea? In fact, tea, the most popular drink in the world （after water）, was invented by accident （偶然）. According to an ancient Chinese legend （传说）, the emperor Shen Nong 1 tea when he was boiling drinking water over an open fire. Some leaves from a nearby bush （灌木丛） fell into the water and remained there for 2 . The emperor noticed that the leaves in the water produced a 3 smell. Later he decided 4 the hot mixture （混合物）. It was quite delicious. And 5 , one of the world’s favorite drinks was invented.
China is the home of tea, 6 has more than 4,000 years history. People throughout China drink tea daily. 7 the three major drinks—tea, coffee and cocoa, tea is drunk by 8 people in the world. Tea from China, along 9 silk and porcelain, began to be known by the world over a thousand years ago and has been an important Chinese export 10 .
Tea leaves 11 mainly in the area south of the Yangtze River, in the provinces of Zhejiang, Jiangxi and Fujian, because of the mild 12 and rich soil there. Longjing, Wulong, Pu’er and Tieguanyin are all 13 kinds of tea.
Over the past centuries, Chinese people 14 their unique tea culture, which includes tea planting, tea-leaf picking, tea making and so on. Tea is 15 a popular topic which is often mentioned in dances, songs, poems and novels.
1. A. invented B. found out C. discovered D. tried out
2. A. sometimes B. some time C. some times D. some days
3. A. pleasant B. pleased C. bad D. terrible
4. A. not to taste B. to taste C. tasting D. taste
5. A. by the way B. on the way C. on its way D. in this way
6. A. who B. which C. where D. when
7. A. In B. For C. Of D. By
8. A. the number of B. a number of C. a large number of D. the largest number of
9. A. between B. with C. except D. besides
10. A. At that time B. from now on C. since then D. since now
11. A. produce B. are produced C. make D. are made
12. A. climate B. weather C. condition D. environment
13. A. interesting B. important C. famous D. normal
14. A. had developed B. have developed C. developed D. are developing
15. A. too B. as well C. either D. also
查看习题详情和答案>>| 完形填空。 | |||
| Do you know who invented tea? In fact, tea, the most popular drink in the world ( after water) , was invented by accident. According to an ancient Chinese legend, the Emperor Shen Nong l tea when he was boiling drinking water over an open fire. Some leaves from a nearby bush fell into the water and remained there for some time. The Emperor noticed that the leaves in the water produced a 2 smell. Later he decided to taste the hot mixture. It was quite delicious. And _3 , one of the world's favorite drinks was invented. China is the home of tea, which has more than 4,000 years history. People throughout(遍及) China drink tea daily. 4 the three major drinks-tea, coffee and cocoa, tea is drunk by the largest number of people in the world. Tea from China, along 5__silk and porcelain(瓷器) , began to be known by the world over a thousand years ago and has been an important Chinese export(出口) 6 . Tea leaves are produced mainly in the area south of the Yangtze River, in the provinces of Zhejiang, Jiangxi and Fujian, because of the mild(温暖的) 7 and rich soil there. Longjing, Wulong, Pu'er and Tieguanyin are all 8 _ kinds of tea. Over the past centuries, Chinese people 9__ their unique (特有的) tea culture, which includes tea planting, tea-leaf picking, tea making and so on. Tea is 10 a popular topic which is often mentioned in dances, songs, poems and novels. | |||
| ( )1. A. invented ( )2. A. pleasant ( )3. A. by the way ( )4. A. In ( )5. A. between ( )6. A. at that time ( )7. A. climate ( )8. A. interesting ( )9. A. had developed ( )10. A. too |
B. found out B. pleased B. on the way B. For B. with B. from now on B. weather B. important B. have developed B. as well |
C. discovered C. bad C. on its way C. Of C. except C. since then C. condition C. famous C. developed C. either |
D. tried out D. terrible D. in this way D. By D. besides D. since now D. environment D. normal D. are developing D. also |
| 完形填空。 | |||
Mr Baker lived in a small town. Nobody was __1__ than him there, but he wished to g et __2__ money all the time. One day, on his way home, he found there was a __3__ on the ground. He picked it up and put it into his pocket. That evening after he had supper, he brought it out and began to __4__ it in the room. He was interested in a piece of news on it. Some gold __5__ in a desert (沙漠). He was afraid someone would  know about it and he started off, __6__ telling anybody about it. He tried to find the place __7__ gold was.The greedy (贪婪的) man walked on the desert for two weeks, but he didn't find any gold and his food and water was __8__. His horse was so weak that he couldn't __9__ it. He had to go back to his hometown, but it was too __10_. His horse at last died and he was too hungry and thirsty to go any __11_. He looked around, there was nothing __12_ sand. Suddenly he saw a man __13_ on the ground far away. He crawled (爬) to him and found he was dead, with a bag in his hand. He hurried to open the bag to find something to __14_, but it was full of gold. He threw it away. As he was dying, he cried and said, "Now, a bag of bread is far more __15_ than a bag of gold. How unhappy I am!" | |||
| ( )1. A. happier ( )2. A. little ( )3. A. newspaper ( )4. A. read ( )5. A. discover ( )6. A. which ( )7. A. with ( )8. A. lifted ( )9. A. ride ( )10. A. early ( )11. A. near ( )12. A. except ( )13. A. standing ( )14. A. wear ( )15. A. beautiful |
B. sadder B. less B. picture B. copy B. invent B. without B. where B. lost B. drive B. late B. nearer B. of B. running B. eat B. use |
C. richer C. a little C. photo C. improve C. was discovered C. for C. when C. wasted C. mend C. easy C. far C. in C. lying C. write C. useful |
D. poorer D. more D. map D. touch D. was invented D. about D. that D. gone D. feed D. possible D. further D. off D. singing D. draw D. nice |
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