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One' s brain becomes blank when he or she doesn' t have a dream.
A．Y
B．N
C．NG
答案
更多“One' s brain becomes blank when he or she doesn' t have a dream.A．YB．NC．NG”相关的问题
第1题
A．Most of us should take more exercise.
B．It's better to live in the town.
C．The brain contracts if it is not used.
D．The more one uses his brain, the sooner he becomes old.
第2题
"We still don't know the【C2】______mechanism of the memory process that occurs during sleep, but the【C3】______of this research suggest it is possible to【C4】______up memory consolidation," Karni said.
Long-term memory【C5】______to memories that stay with us for years, such as "what" memories -- a car accident that happened yesterday -- or " how to " memories, such as one's learned【C6】______to play the drums.
Karni, who【C7】______the study in a recent issue of the journal Nature Neuroscience,【C8】______participants to learn a complex thumb-tapping sequence, then【C9】______the study subjects into two groups: one that【C10】______for an hour, and one that didn't. The people who took an afternoon snooze showed【C11】______improvement in their performance by that evening.
"After a night's sleep the two groups were at the same【C12】______, but the group that slept in the afternoon【C13】______much faster than the group that stayed【C14】______," Karni said.
【C15】______, the study also showed just how much【C16】______a 90-minute nap could help lock in long-term memories.
"Daytime sleep can【C17】______the time 'how to' memory becomes【C18】______to interference and forgetting," Karnl said. "【C19】______of 6 to 8 hours, the brain【C20】______the memory during the 90-minute nap. "
【C1】
A．snack
B．nap
C．sleep
D．exercise
第3题
听力原文：W: A great day, isn't it？
M: I guess so. But I feel awful because I watched TV until after midnight last night.
W: After midnight! Did you watch so late because you were bored？ I usually watch TV only ff I have nothing better to do.
M: Bored？ No, I was upset because I left my meal tickets in the cafeteria.
W: That worth more than fifty dollars. So, did watching TV make you feel better？
M: A bit. But after I turned the TV off, I just felt disgusted with myself for wasting so much time.
W: I've had that feeling before.
M: I had intended to watch just one program, but somehow I couldn't make myself switch off the TV.
W: Actually, I've read that there's a scientific explanation for that. It seems that there's a part of the brain that processes complex information, but that part becomes less active while watching TV.
M: That's certainly how I felt last night--like my brain wasn't very active.
W: That's not the worst of it. If you watch TV a lot, or for a long time, that part of the brain--the part that processes complex information, shows lowered activity and you become more and more passive.
M: That's incredible.
W: Next time you feel upset, you should go swimming. That's what I do, and it always makes me feel better.
M: I suppose. Now I've got to go to the cafeteria and get some more meal tickets.
(23)
A．When she's bored.
B．When there is a good program on.
C．After midnight.
D．After swimming.
第4题
Computers imitate life. As computer get more complex, the imitation gets better. Finally, the line between the original and the copy becomes unclear. In another 15 years or so, we will the computer as a new form. of life.
The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives car can be programmed into the computer’s brain just as nature programmed them into our human brains as a part of the equipment for survival.
Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that prevents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain one time and it freezes up.
We are still control, but the capabilities of computer are increasing at a fantastic rate, while raw human intelligence is changing slowly, if as all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain.
That does not mean the evolution of intelligence has ended on the earth. Judging by the he past, we can expect that a new species will arise out of man, surpassing his achievements those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man’s flesh-and-blood descendants. The new kind of intelligent life is more I likely to be made of silicon.
第31题：What do you suppose the attitude of Dr. Samuel Johnson towards ladies preaching？
A) He believed that ladies were born worse preachers that men.
B) He was pleased that ladies could though not as well as men.
C) He disapproved of ladies preaching.
D) He encouraged ladies to preach.
第5题
Which of the following is NOT true？
A．To achieve creative thinking, one should create new things in the mind.
B．It is useful to imagine the whole range of our senses.
C．Using the right side of one's brain helps develop creative thinking.
D．It is pointless to practice one's visual thinking.
第6题
根据以下资料，回答下列各题：
In this passage, intelligence____________
A. is endowed with a traditional definition
B. becomes a way to measure one's academic ability
C. turns into a measurement of living standard
D. refers to how a person looks at life and acts upon it
第7题
Part Ⅱ Reading Comprehension (Skimming and Scanning)
Directions: In this part you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1～7 , choose the best answer from the four choices marked A), B), C) and D). For questions 8～10, complete the sentences with the in formation given in the passage.
Sound Effects
Snorers(打鼾的人) have always been made jokes. In cartoons, their nasal(鼻子的)roar lifts the roof off houses. In situation comedies, there's the wife who rolls her eyes at her snoring bedmate. But in reality, it's not all that funny. In fact, snoring can be a nightmare for snorers and their troubled partners, who may wake up several times a night to poke, and maybe hoist loved ones onto their sides for a little relief.
Risks of Snoring Problems
But the nightly racket is more than a potential relationship strain. According to the latest research, an increasingly older and heavier population may make this condition an even greater a health risk than we previously thought. For Maggie Moss-Tucker, successful treatment for a longtime snoring problem came almost by accident. One fall morning in 2005, she saw a sign at her local gym seeking snorers as volunteers for a study at Boston's Brigham & Women's Hospital. Moss-Tucker, now 56, was intrigued. She had started snoring nearly a decade earlier. "I'd tried everything to stop," she says, from sleeping upright to using nose strips or a mouth guard. But to her and her husband's dismay, nothing worked. When she signed up for the study and spent a night at a suburban Boston sleep lab, she found out why.
After reviewing her sleep patterns and oxygen levels, researchers told her that her snoring was actually an indication of something worse. She suffered from a sleep apnea(呼吸暂停), a condition in which patients stop breathing repeatedly as they sleep and can wake up as many as 100 times a night often without remembering it. That kind of revelation has led to doctors re-evaluating a condition once treated as little more than a nuisance. "In the past, snoring has been treated like a joking matter; you never talked about it with your doctor, "says Dr. David Rapoport, medical director of the Sleep Disorders Center at New York University Medical Center. "But when it becomes very prominent or such that it wakes you up or interferes with breathing, it can be a problem."
Sleep apnea, in which the airway becomes blocked or, less often, the brain fails to properly control breathing during sleeping, can be viewed as one extreme of the snoring spectrum. Soft snoring, which is not generally considered a health hazard, would be at the other end. As the sound and persistence of a patient's snoring grows, so do the health concerns. A study published in the March 1 issue of the journal Sleep found that loud snorers had a 40 percent greater risk than non-snorers of suffering from high blood pressure, 34 percent greater odds of having a heart attack and a 67 percent greater chance of having a stroke.
That's a problem given the number of noisy sleepers out there. In a recent poll by the National Sleep Foundation, about one third of US working adults reported snoring at least a few nights in the previous month. Snoring generally worsens with age so the rate is even higher among the elderly. And, contrary to common perceptions, it's nearly as common in women as men. Menopause(更年期) appears to be a factor, as is weight. Being overweight can cause thickness in the airway tube, holding back the flow of oxygen.
Treatment of Snoring Problems
Yet many who regularly snore don't realize that it could be bad for their health. The research linking hypertension, cardiac problems and loud snoring is relatively new. And though awareness of s
A．the causes of snoring problems
B．the treatments of snoring problems
C．the risks of snoring problems
D．the hazards and the treatments of snoring problems
第8题
Breaking nicotine addiction is not easy. Each year, nearly 35 million people make a concerted effort to quit smoking. Sadly, less than 7 percent succeed in abstaining for more than a year; most start smoking again within days. So what is nicotine and how does it insinuate(慢慢滋长) itself into the smoker&39;s brain？
The nicotine found in tobacco is a potent drag. Smokers, and even some scientists, say it offers certain benefits. One is enhanced performance. One study found that non-smokers given doses of nicotine typed about 5 percent faster than they did without it. To greater or lesser degree, users also say nicotine helps them to maintain concentration, reduce anxiety, relieve pain, and even dampen their appetites(thus helping in weight control). Unfortunately, nicotine can also produce deleterious effects beyond addiction. At high doses, as are achieved from tobacco products, it can cause high blood pressure, distress in the respiratory and gastrointestinal systems and an increase in susceptibility to seizures and hypothermia(体温降低).
First isolated as a compound in 1828, in its pure form. nicotine is a clear liquid that turns brown when burned and smells like tobacco when exposed to air. R is found in several species of plants, including tobacco and, perhaps surprisingly, in tomatoes, potatoes, and eggplant(though in extremely low quantities that are pharmacologically insignificant for humans).
As simple as it looks, the cigarette is highly engineered nicotine delivery device. For instance, when tobacco researchers found that much of the nicotine in a cigarette wasn&39;t released when burned but rather remained chemically bound within the tobacco leaf, they began adding substances such as ammonia(氨水) to cigarette tobacco to release more nicotine. Ammonia helps to keep nicotine in its basic form, which is more readily vaporized by the intense heat of the burning cigarette than the acidic form. Most cigarettes for sale in the US today contain 10 milligrams or more of nicotine. By inhaling smoke from a lighted cigarette, the average smoker takes 1 or 2 milligrams of vaporized nicotine per cigarette. Today we know that only a miniscule amount of nicotine is needed to fuel addiction. Research shows that manufacturers would have to cut nicotine levels in a typical cigarette by 95% to forestall its power to addict. When a smoker puffs on a lighted cigarette, smoke, including vaporized nicotine, is drawn into the mouth. The skin and lining of the mouth immediately absorb some nicotine, but the remainder flows straight down into the lungs, where it easily diffuses into the blood vessels lining the lung walls. The blood vessels carry the nicotine to the heart, which then pumps it directly to the brain. While most of the effects a smoker seeks occur in the brain, the heart takes a hit as well. Studies have shown that a smoker&39;s first cigarette of the day can increase his or her heart rate by 10 to 20 beats a minute. Scientists have found that a smoked substance reaches the brain more quickly than on swallowed, snorted(such as cocaine powder) or even injected. Indeed, a nicotine molecule inhaled in smoke will reach the brain within 10 seconds. The nicotine travels through blood vessels, which branch out into capillaries(毛细血管) with the brain.
Capillaries normally carry nutrients but they readily accommodate nicotine molecules as well. Once inside the brain， nicotine， like most addictive drugs， triggers the release of chemicals associated with euphoria and pleasure.
Just as it moves rapidly from the lungs into the bloodstream， nicotine also easily diffuses through capillary walls. It then migrates to the spaces surrounding neurones – ganglion cells that transmit nerve impulses throughout the nervous system. These impulses are the basis for our thoughts， feelings， and moods. To transmit nerve impulses to its neighbour， a neurone releases chemical messengers known as neurotransmitters. Like nicotine molecules， the neurotransmitters drift into the so－called synaptic space between neurones， ready to latch onto the receiving neurone and thus deliver a chemical “message” that triggers an electrical impulse.
The neurotransmitters bind onto receptors on the surface of the recipient neurone. This opens channels in the cell surface through which enter ions， or charged atoms， of sodium. This generates a current across the membrane of the receiving cell， which completes delivery of the “message”. An accomplished mimic， nicotine competes with the neurotransmitters to bind to the receptors. It wins and， like the vanquished chemical， opens ion channels that let sodium ions into the cell. But there’s a lot more nicotine around than the original transmitter， so a much larger current spreads across the membrane. This bigger current causes increased electrical impulses to travel along certain neurones. With repeated smoking， the neurones adapt to this increased electrical activity， and the smoker becomes dependent on the nicotine.
1.Although nicotine is probably the well－known chemical in cigarettes， it is not necessarily the one that changes the psyche of the smoker when cigarettes are smoked
A.Y
B.N
C.NG
In spite of the difficulties, according to the text more than thirty-five million people a year give up smoking.
A.Y
B.N
C.NG
It has been shown that nicotine in cigarettes can improve people&39;s abilities to perform. some actions more quickly.
A.Y
B.N
C.NG
Ammonia added in cigarettes allows smokers to inhale more nicotine.
A.Y
B.N
C.NG
Snorted substances reach the brain faster than injected substances.
A.Y
B.N
C.NG
Nicotine dilates the blood vessels that carry it around the body.
A.Y
B.N
C.NG
Nicotine molecules allow greater electrical charges to pass between neurones.
A.Y
B.N
C.NG
Cigarette companies would have to cut the nicotine content in cigarettes by ______ to prevent them from being addictive.
According to the passage, a cigarette can raise a smoker&39;s heart rate by ______ a minute.
In order to transmit nerve impulses to its neighbor, a neurone sends ______ known as neuron-transmitters.
请帮忙给出每个问题的正确答案和分析，谢谢！
第9题
Events【C4】______ the plant and animal affect its actions. Scientists recently found that a tiny animal called Siberian hamster changes the color of its【C5】______ because of the number of hours of【C6】______ . In shorter days of winter its fur becomes white. The fur becomes gray-brown in longer【C7】______ of daylight in summer.
【C8】______signals control other biological clocks. German scientists found that some internal one seems to order birds to begin their【C9】______ flights two times each year. Birds prevented from flying become【C10】______ when it is time for the trip.【C11】______ they become calm again when the time of the flight has ended. A mix of outside and internal events controls some biological clocks; such things as heartbeat and the daily change from sleep to walking take place because of both external and internal signals.
Scientists are beginning to learn【C12】______ parts of the brain contain the biological clocks. A researcher at Harvard University, Dr. Martin Moore Ede, said a small group of cells near the front of the brain seemed to control the【C13】______ of some of our actions. Probably there are other cells to control other body activities. He is studying【C14】______ they affect the way we do our work. Most of us have great difficulty if we【C15】______ often change to different work hours.【C16】______ can take many days for a human body to【C17】______ a major change in work hours. Industrial officials should have a better【C18】______ of biological clocks and how they affect workers. He said such an understanding could【C19】______ sickness and accidents at work, and would help increase【C20】______ .
【C1】
A．form
B．bloom
C．blossom
D．boom
第10题
Artificial Intelligence
I'm sure that Hans Moravec is at least as sane as I am, but he certainly brought to mind the classic mad scientist as we sat in his fifth-floor office at Carnegie-Mellon University on a dark and stormy night. It was nearly midnight, and he mixed for each of us a bowl of chocolate milk and Cheerios, with slices of banana piled on top.
Then, with banana-slicing knife in hand, Moravec, the senior research scientist at Carnegie Mellon's Mobile Robot Laboratory, outlined for me how he could create a robotic immortality for Everyman, a deathless universe in which life would go on forever. By creating computer copies of our minds and transferring, or downloading, this program into robotic bodies, Moravec explained, humans could survive for centuries.
"You are in an operating room. A robot brain surgeon is in attendance ... Your skull but not your brain is anesthetized (麻醉). You are fully conscious. The surgeon opens your braincase and peers inside." This is how Moravec described the process in a paper he wrote called "Robots That Rove". The robotic surgeon's attention is directed at a small clump of about one hundred neurons somewhere near the surface. Using high-resolution 3-D nuclear-magnetic-resonance holography, phased-array radio encephalography, and ultrasonic radar, the surgeon determines the three-dimensional structure and chemical makeup of that neural clump. It writes a program that models the behavior. of the clump and starts it running on a small portion of the computer sitting next to you.
That computer sitting next to you in the operating room would in effect be your new brain. As each area of your brain was analyzed and simulated, the accuracy of the simulation would be tested as you pressed a button to shift between the area of the brain just copied and the simulation. When you couldn't tell the difference between the original and the copy, the surgeon would transfer the simulation of your brain into the new, computerized one and repeat the process on the next area of your biological brain.
"Though you have not lost consciousness or even your train of thought, your mind--some would say soul--has been removed from the brain and transferred to a machine," Moravec said, "In a final step your old body is disconnected. The computer is installed in a shiny new one, in the style, color, and material of your choice."
As we sat around Moravec's office I asked what would become of the original human body after the downloading. "You just don't bother waking it up again if the copying went successfully." he said. "It's so messy. Humans have got so many problems that you might just want to leave it retired. You don't take your Junker car out if you've got a new one."
Moravec's idea is the ultimate in life insurance. Once one copy of the brain's contents has been made, it will be easy to make multiple backup copies, and these could be stashed in hiding places around the world, allowing you to embark on any sort of adventure without having to worry about aging or death. As decades pass into centuries you could travel the globe and then the solar system and beyond--always keeping an eye out for the latest in robotic bodies into which you could transfer your computer mind.
If living forever weren't enough, you could live forever several times over by activating some of your backup copies and sending different versions of yourself out to see the world. "You could have parallel experiences and merge the memories later," Moravec explained.
In the weeks and months that followed my stay at Carnegie-Mellon, I was intrigued by how many researchers seemed to believe downloading would come to pass. The only point of disagreement was when--certainly a big consideration to those of us still knocking around in mortal bodies. Although some of the researchers I spoke with at Carnegie-Mellon,
A．Y
B．N
C．NG
