Research suggests that a newly-identified gene known as insomniacs(失眠症患者) may play a role in keeping us asleep. By cloning and testing this gene in about 21,000 fruit flies, Rockefeller University researchers say they have discovered an entirely new mechanism (机制) by which sleep is controlled.
By studying these flies, the researchers discovered that mutations(变异) in the insomniac gene were associated with a great reduction in sleep. While a typical fruit fly slept for an average of 927 minutes a day, the mutant flies slept for just 317. They also slept for shorter periods of time, and slept and woke more frequently.
“The results showed a great loss of both the time that the flies’ sleep lasted and their ability to remain asleep after they slept,” says researcher Nicholas Stavropoulos.
The researchers also examined the link between sleep and lifespan, finding that flies with mutations to the insomniac gene lived only about two-thirds as long as unchanged flies. But when the scientists removed insomniac only in neurons（神经细胞）---allowing it to remain in the rest of the flies’ bodies---this difference disappeared; the resulting animals slept poorly but lived just as long.
“This suggests that reduced sleep can be ‘uncoupled’(分开) from reduced lifespan, supporting the idea that some interruptions of sleep do not affect overall health, at least as far as lifespan is concerned,” Stavropoulos says.
Although flies and humans would appear to have little in common when it comes to lifestyle, scientists say that the mechanisms of sleep and wakefulness are likely to be quite similar.
“Sleep is a fundamental behavior in all animals, and it is poorly understood from a scientific standpoint, says Stavropoulos. This work could prove useful in understanding and treating sleep disorders”
【小题1】The text is mainly about____.

A businessman must keep records of the money he takes in and the money he spends. The work of keeping such records is called bookkeeping. The work of deciding how the records should be set up is called accounting. An accountant also finds out, by studying the records, whether or not a business is doing well. The accountant must know many things about the business.

Suppose a man owns a small clothing store, he keeps records that show that he spent money for newspaper advertising and for suits, shirts, shoes, and neckties to sell to his customers. He had to pay a young man to help him in the store. He also paid rent and had other expenses.

At the end of the year, he must take an inventory. That is, he counts how many pieces of clothing he has on hand. Then he must find out exactly how many he sold, how much money he took in, and how much money he spent in running the business. If he took in more than he spent, he made a profit for the year. If he spent more than he took in, he suffered a loss. He depends on his store accounting records to get all this information.

The owner of a small clothing store can keep records without much trouble. But a big oil company or a big bank has many difficult accounting problems. The company must know how much money is to be paid by its debtors and how much it owes other companies for supplies. It must know how much it has lost in depreciation, or wear and tear of its equipment. All of this information must be kept in the company’s accounts. Big companies employ many accountants.

After a company’s accountants finish their yearly count, their work must be officially examined. Experts from outside company double-check the records to be sure the accounts are correct.

1. According to the passage, a clothing store owner needs to keep records of the money he spends for ______.

A. clothing only                          B. newspaper advertising  

C. all necessary expenses              D. housing

2. After taking an inventory, if the owner found that he had got more money than he had spent, he made _______.

A. a profit     B. a loss         C. an income     D. an interest

3. A small store owner can usually keep records _______.

A. with difficulty                B. easily          

C. without any help              D. without working

4. In big companies, after the accountants finish the yearly count, _______.

A. the work will be well done              B. no one will check it

C. the records will be finished      D. experts will check the records

A proven method for effective textbook reading is the SQ3R method developed by Francis Robinson. The first is to survey (the S step) the chapter by reading the title, introduction, section headings, summary., and by studying any graphs, tables, illustrations or charts. The purpose of this step is to get an overview of the chapter so that you will know before you read what it will be about.  In the second step (the Q step), for each section you ask yourself questions such as "What do I already know about this topic?" and "What do I want to know?" In this step you also take the section heading and turn it into a question. This step gives you a purpose for reading the section. The third step (the first of the 3 R's) is to read to find the answers to your questions. Then at the end of each section, before going on to the next section, you recite ( the second of the 3 R's) the answers to the questions that formed in the question step. When you recite you should say the information you want to learn out loud in your own words. The fifth step is done after you have completed step 2, 3 and 4 for each section. You review (the last of the 3 R's) the entire chapter. The review is done much as the survey was in the first step. As you review, hold a mental conversation with yourself as you recite the information you selected as important to learn. The mental conversation could take the form of asking and answering the questions formed the headings or reading the summary, which lists the main ideas in the chapter, and trying to fill in the details for each main idea.
【小题1】 The passage implies that the SQ3R method          .

Jungle country is not friendly to man, but it is possible to survive there. You must have the right equipment and you must know a few important things about woodcraft. Then your chances of staying alive are very good.

No one should go into the jungle without the right equipment. You need light weight clothing, a good knife, and a compass. Fishhooks and a line, a rifle, matches in a waterproof container and a poncho are necessary too. So is a mosquito net to protect the head.

In the jungle you can get hopeless lost within five minutes after leaving a known landmark. That is why you should always carry a compass. In open country, during the day, you can tell which way o go by studying the sun. At night the stars are sure guides o direction. But in most places the jungle rooftop is so thick that it is impossible to see the sun or the stars. Again and again you must check your position by the compass.

Keep alert. Watch the ground in front of you carefully. Stop and listen now and again. Avoid haste, and rest often. In a place that is hot and humid, the person who sets a fast pace will soon become tired. A steady, even pace is wisest in the long run.  

If you lose your way, don’t panic. Try to desire how long it has been since you were sure of your position. Mark the spot where you are with blazes on a tree. Put them on four sides of the tree, so that you will be able to see them from any direction. Then you can begin retracing your steps, knowing that you can always find the spot from which you started. Except in an emergency, never try to travel through the jungle at night.

Whenever possible, it is wise to follow streams and rivers that are going in your general direction. This may cause you many extra miles of travel. But in the end it will save time and energy. Nothing is more exhausting than hacking a trail cross-through umbrella jungle.

If a river is broad and deep and has no rapids, rafting is the best means of travel. Bamboo grows along the banks of many jungle streams. Since it is hollow and extremely strong, it makes a perfect raft.

Surviving in the jungle is a science. The jungle people have become perfect in this science, and you can too. Learn as much as you can about what to expect in the jungle. Make sure you have the right equipment. Then no part of the jungle will be able to “live off” it for a long time.

The author probably advises against traveling at night because ________.

one tends to move too slowly at night

some animals will attack you

emergencies occur most frequently at night

it is more difficult to check your position

Following streams and rivers will help you to ________.

avoid animal’s attacks

save many extra miles of travel

avoid crossing unbroken stretches of jungle

have a constant source of drinking water  

The word “blazes” in Paragraph 5 means _________.

A. marks where bark (树皮) is removed          B. light-colored spots

C.bursts of flame                            D. sides of knife

The Jonas Brothers are an American pop-rock band from Wyckoff，New Jersey．Born to musical parents．the Jonas Brothers grew up in a home where music was a large part of everyday life．Father Kevin Jonas，Sr．is the co-founder of Christ For The Nations Music，as well as a pastor(牧师)at a local church，in Wyckoff, NJ．Growing up in such a musically accomplished family gave the boys a love for music，as well as a bit of inside knowledge about the workings of the music industry．
19-year-old Kevin Jonas is the oldest of the three boys．At 13，Kevin taught himself to play me guitar, simply by studying a “Teach Yourself Guitar” book that he had found lying around his parents’home in New Jersey．Kevin spent about three days learning all of the major guitar chords(和弦)while he was home from school，due to illness．Even before their band was formed，Kevin had already appeared in several television commercials for Disney, Lego，and Burger King．
Joseph Jonas is 17 years old．While Joe originally wanted to be a comedian，he always had a love for music as well．Joe’s appearance in Baz Luhrmann’s Broadway production of“La Boheme” was his first performance as a singer．Joe said that watching his brother, Kevin，perform on Broadway was what motivated him to want to give musical theatre a try．Since discovering his talent for musical performances，Joe has never turned back．
Nick Jonas is 14 years old, and the youngest of the three Jonas Brothers．Despite his young age, he is sometimes referred to as the motivation behind the band. At 6 Nick was singing while getting his hair cut at a local barber shop, when a lady heard him, and gave him a card, suggesting that he should meet with a professional manager. From then on Nick was performing in front of audiences, big and small. Nick landed roles in Broadway shows like “Annie Get Your Gun”, “Beauty and the Beast”, and “Les Miserables”.
64．Kevin Jonas learned to play the guitar         
A．by himself                 B．from his father
C．at a music school           D．under his teacher’s guidance
65．Joseph Jonas decided to try singing on stage because      
A．he had longed to do so since his childhood
B．his parents wanted the brothers to sing together
C．he was invited to act in a show at a local theatre
D．Kevin’s performance on Broad way inspired him
66．From the passage，we can infer that     ．
A．the barber decided to give Nick Jonas a free hair cut
B．the owner of the shop considered Nick Jonas a VIP
C．Nick Jonas was advised to discuss his future career
D．Nick Jonas’handsome appearance attracted a woman
67．The passage is intended to      ．
A．offer readers information about the Jonas Brothers
B．prove strong family ties combine the boys together
C．explain why the three brothers began singing together
D．show how the boys are different from one another