75．Which of the following is NOT true?

　　　 A．When people first remember something, the memory is in an “unstable state”.

　　　 B．The brain will change those important unstable memories into stable.

　　　 C．Once the memory become stable, it will never become unstable again.

　　　 D．Sleep can protect memories from being harmed.

答案　 72.C　 73.D　 74.D　 75.C

Passage 37

(吉林省实验中学2007届高三第四次模拟考试A篇)

LONDON- “Everyone else has one!” Lucy declared to her parents, trying to get a mobile phone as a gift for 14th birthday. Her parents gave in.

Curious to know how her daughter would use the phone, Jane Bidder, the mother, followed Lucy to the school bus in the morning. The bus seats 20, of whom half have a mobile phone. One rings and several adolescent owners fumble with their bags.

Many parents have just come to realize that the mobile phone is no longer for traveling businessmen-it is as likely to be found in school bags.

The mobile phone seems to have become something essential for today’s teens in Britain, according to a survey published last week, by NOP, a leading market research company in Britain. Research found that 66 percent of 16 – year – olds now have access to a mobile phone.

The mobile phone has been turned into a secret messaging service by teen users. When they are talking on the mobile, their parents are not able to eavesdrop on the second line.

The interview with 2,019 young people aged 7 to 16 found that they favor the text messaging service because they offer a secret way of keeping in touch. The days of secret notes in the classroom are dying out.

For example, “cul” means “see you later”; “lol” means “laugh out loud’; and “2nite” is the abbreviation of “tonight”. All these are based on shorthand phrases on the Internet.

Many schools have banned students using mobile phones. But they are not very successful. Still phones ring in the class and disturb study. Besides, people are worried about the health risk to kids using mobile phones.

Scientists believe children are especially vulnerable(易受伤的)mobile radiation.

74．According to the passage, memory_____

　　　 A．is a hard-writing of the brain

　　　 B．is not a process of storage

　　　 C．is not a process of restorage

　　　 D．will be mature with the help of sleep

73．The words the 12 volunteers played in the experiment were not ____

　　　 A．created through a speech synthesizer

　　　 B．hard to understand

　　　 C．available at the beginning

　　　 D．designed to test people’s ability of understanding

72．What does the first paragraph implies?

　　　 A．A busy day makes people forget things easily.

　　　 B．People need a good night’s sleep after a busy day.

　　　 C．A good night’s sleep helps memories.

　　　 D．A good night’s sleep helps people forget a busy day.

67．By writing the passage, the author tries to　　　 .

　　　 A．close some of the burger and pizza restaurants

　　　 B．draw the public attention to the problem of rats

　　　 C．prevent the rats from growing up

　　　 D．making advertisement for the classic horror film The Rats

答案　 64.B　 65.B　 66.C　 67.B

Passage 36

(北京市北大附中2007年5月高三最后适应测试E篇)

Even facts “forgotten” by people during a busy day may be retrieved if this is followed by a good night’s sleep.

Researchers from the University of Chicago asked volunteers to remember simple words．Many found their memories letting them down towards the end of the day, but the following morning, those who had slept well could recall much more.

Researchers, writing in the journal Nature, said the brain could “rescue” lost memories during the night.

When the brain is first asked to remember something that memory is laid down in an “unstable” state, meaning that it is possible that it could be lost．At some point, the brain consolidates those it deems important into a “stable”, more permanent state．However, the Chicago researchers suggested that it was possible for a “stable” memory to be made “unstable” again．This would mean that memories could be modified then filed away again in the face of new experiences.

The 12 volunteers tested in the experiment were played words created through a speech synthesizer which were purposely difficult to understand．Initially, the written version of the word　 from the audio version only．Tests revealed that the ability to recall the right word tended to tail off as the day ended.

However, when the volunteers were retested after a good night’s sleep, they were able to recall some words that they had “ forgotten” the previous evening.

Dr Daniel, one of the study authors, said: “Sleep consolidates memories, protecting them against subsequent interference or decay．Sleep also appears to “recover” or restore memories.” He said: “If performance is reduced by decay, sleep might actively recover what has been lost.”

Dr Karim Nader, from the Department of Psychology in McGill University in Montreal, said: “Memory research is undergoing a transformation---no longer is memory thought to be a hard-writing of the brain, instead it seems to be a process of storage and restorage.”

Sleep helps some memories “mature” and also prunes out unimportant memories.

66．We may infer from the passage that　　　 .

　　　 A．Weil’s Disease will finally end the world

　　　 B．pizzas and crisps will become poisonous

　　　 C．rats will endanger human beings’ life　　

　　　 D．young people are blame for the rat population

65．What is the human population now according to the writer?

　　　 A．60 million.　　　 B．58 million.　　　 C．35 million.　　　 D．2 million.

64．Where did the rodents use to search for food?

　　　 A．In the Street .　　　　　 B．Under the ground.

　　　 C．From the trash cans. D．In burger shops.　

59．What does the writer intend to tell us?

　　　 A．The cleverest animal is the gorilla because it can make beds.

　　　 B．Differences in habitat could lead to different living habits.

　　　 C．The ways animals catch their ZZZ’s are pretty much he same .

　　　 D．In order to protect themselves most animals choose not to sleep.

答案　 56.C　 57.A　 58.D　 59.B

Passage 35

(北京东城区2006-2007学年度第一学期期末教学目标检测C篇)

Britain is facing a sharp rise in its rat population as growing numbers of people leave fast food scraps in the street ,an environment group warned .Keep Britain Tidy said the rodents(啮齿动物)were stopping their traditional hunts underground and were roaming the streets ,tempted by discarded burgers ,pizzas and crisps. “The rat population is on the rise and soon it’ll be as common to see a rodent on our street as it is to see a dog or a cat,” said group Director ,Sue Nelson. The practice of dumping fast food litter and scraps on the street rather than in the trash-with young men the worst offenders-was behind the rise. According to the National Rodent Survey in 2005, Britain’s rat population has grown by nearly one quarter since 2000 and is now estimated at 60 million ,two million more than the human population. On average a rat can give birth every 24-28 days and just a single pair of rats can produce a colony of 2,000 a year. Around 200 people a year get Weil’s Disease –an infection which can lead to liver or kidney(肝肾)failure and eventually death and which is arrived in rat’s waste. To highlight the issue ,Keep Britain Tidy launched a cinema ad entitled “How close do you want them to get?” The ad gave a shocking image of a young woman sleeping in a bed of rots –echoing the nightmare scene from James Herbert’s classic horror tale The Rats, in which mutant rodents begin to prey on(捕食)humans.

58．Why will not birds fall when they are at rest?

　　　 A．They build nests and sleep in them.　　　 B．They fall asleep automatically.

　　　 C．They have a loose tendon in their legs.　 D．They lock their feet around a branch.