Lying under the skull, the human brain contains an average of the ten billion nerve cells called（）.A、neuronsB、nerve systemC、nervesD、cerebral cortex

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Learning Disabilities
Learning disabilities are very common.They affect perhaps 1 0 percent of all children.Four times as many boys as girls have learning disabilities.
Since about 1970,new research has helped brain scientists understand these problems better.Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things.There is no longer any question that all learning disabilities result from differences in the way the brain is organized.
You cannot look at a child and tell if he or she has a learning disability.There is no outward sign of the disorder.So some researchers began looking at the brain itself to learn what might be wrong.
In one study,researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things.One involved cells in the left side of the brain,which control language.These cells normally are white.In the learning disabled person,however,these cells were gray.The researchers also found that many of the nerve cells were not in a line the way they should have been.The nerve cells were mixed together.
The study was carried out under the guidance of Norman Geschwind,an early expert on learning disabilities, Doctor Geschwind proposed that learning disabilities resulted mainly from problems in the left side of the brain. He believed this side of the brain failed to develop normally.Probably,he said,nerve cells there did not connect as they should.So the brain was like an electrical device in which the wires were crossed.
Other researchers did not examine brain tissue.Instead,they measured the brain's electrical activity and made a map of the electrical signals.
Frank Dully experimented with this technique at Children's Hospital Medical Center in Boston.Doctor Dully found large differences in the brain activity of normal children and those with reading problems.The differences appeared throughout the brain.Doctor Dully said his research is evidence that disabilities involve damage to a wide area of the brain,not just the left side.

Scientists found that the brain cells of a learning-disabled person differ from those of a normal person in______.
A:structure and function
B:color and function
C:size and arrangement
D:color and arrangement

共用题干
Learning Disabilities
Learning disabilities are very common.They affect perhaps 1 0 percent of all children.Four times as many boys as girls have learning disabilities.
Since about 1970,new research has helped brain scientists understand these problems better.Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things.There is no longer any question that all learning disabilities result from differences in the way the brain is organized.
You cannot look at a child and tell if he or she has a learning disability.There is no outward sign of the disorder.So some researchers began looking at the brain itself to learn what might be wrong.
In one study,researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things.One involved cells in the left side of the brain,which control language.These cells normally are white.In the learning disabled person,however,these cells were gray.The researchers also found that many of the nerve cells were not in a line the way they should have been.The nerve cells were mixed together.
The study was carried out under the guidance of Norman Geschwind,an early expert on learning disabilities, Doctor Geschwind proposed that learning disabilities resulted mainly from problems in the left side of the brain. He believed this side of the brain failed to develop normally.Probably,he said,nerve cells there did not connect as they should.So the brain was like an electrical device in which the wires were crossed.
Other researchers did not examine brain tissue.Instead,they measured the brain's electrical activity and made a map of the electrical signals.
Frank Dully experimented with this technique at Children's Hospital Medical Center in Boston.Doctor Dully found large differences in the brain activity of normal children and those with reading problems.The differences appeared throughout the brain.Doctor Dully said his research is evidence that disabilities involve damage to a wide area of the brain,not just the left side.

Which of the following is NOT mentioned in the passage?
A:Learning disabilities may result from the unknown area of the brain.
B:Learning disabilities may result from damage to a wide area of the brain.
C:Learning disabilities may result from abnormal organization of the brain cells.
D:Learning disabilities may result from problems in the left side of the brain.

The method works best cases where total deafness is due to malfunctioning of the ear’s sensory cells.There must be sufficient functioning nerve fibers available to transmit the message to the brain（ ）;there are generally no more than 10 percent remaining in most cases,since they tend to atrophy with disuse.

A.fortunately
B.spontaneously
C.basically
D.unfortunately

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Parkinson's Disease

1 Parkinson's disease affects the way you move.It happens when there is a problem with certain nerve
cells in the brain. Normally , these nerve cells make an important chemical called dopamine（多巴胺）. Dopa-
mine sends signals to the part of your brain that controls movement.It lets your muscles move smoothly and
do what you want them to do.When you have Parkinson's,these nerve cells break down.Then you no longer
have enough dopamine,and you have trouble moving the way you want to.
2 No one knows for sure what makes these nerve cells break down.But scientists are doing a lot of re-
search to look for the answer. They are studying many possible causes,including aging and poisons in the en-
vironment.Abnormal genes seem to lead to Parkinson's disease in some people.But so far,there is not enough
proof to show that it is always inherited.
3 Tremor（颤抖）may be the first symptom you notice.It is one of the most common signs of the
disease,although not everyone has it.Tremor often starts in just one arm or leg or only on one side of the
body.It may be worse when you are awake but not moving the affected arm or leg. It may get better when you
move the limb or when you are asleep.In time,Parkinson's affects muscles all through your body,so it can
lead to problems like trouble swallowing or constipation（便秘）.In the later stages of the disease , a person
with Parkinson's may have a fixed or blank expression,trouble speaking,and other problems.Some people
also have a decrease in mental skills.
4 At this time,there is no cure for Parkinson's disease.But there are several types of medicines that
can control the symptoms and make the disease easier to live with.You may not even need treatment if your
symptoms are mild.Your doctor may wait to prescribe medicines until your symptoms start to get in the way of
your daily life.Your doctor will adjust your medicines as your symptoms get worse.You may need to take
several medicines to get the best results.

You'll find it hard to move the way you want to__________.
A:what affects muscles all through your body
B:if there isn't enough dopamine in your body
C:which cannot be cured yet
D:which may be the first symptom you notice
E:if you have a fixed or blank expression
F: what causes Parkinson's disease

Nerve signals may travel through nerve or muscle fibers at speeds as high as two hundred miles per hour.

A:velocities
B:impulses
C:ratios
D:atrocities

共用题干
Learning Disabilities
Learning disabilities are very common.They affect perhaps 1 0 percent of all children.Four times as many boys as girls have learning disabilities.
Since about 1970,new research has helped brain scientists understand these problems better.Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things.There is no longer any question that all learning disabilities result from differences in the way the brain is organized.
You cannot look at a child and tell if he or she has a learning disability.There is no outward sign of the disorder.So some researchers began looking at the brain itself to learn what might be wrong.
In one study,researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things.One involved cells in the left side of the brain,which control language.These cells normally are white.In the learning disabled person,however,these cells were gray.The researchers also found that many of the nerve cells were not in a line the way they should have been.The nerve cells were mixed together.
The study was carried out under the guidance of Norman Geschwind,an early expert on learning disabilities, Doctor Geschwind proposed that learning disabilities resulted mainly from problems in the left side of the brain. He believed this side of the brain failed to develop normally.Probably,he said,nerve cells there did not connect as they should.So the brain was like an electrical device in which the wires were crossed.
Other researchers did not examine brain tissue.Instead,they measured the brain's electrical activity and made a map of the electrical signals.
Frank Dully experimented with this technique at Children's Hospital Medical Center in Boston.Doctor Dully found large differences in the brain activity of normal children and those with reading problems.The differences appeared throughout the brain.Doctor Dully said his research is evidence that disabilities involve damage to a wide area of the brain,not just the left side.

Doctor Dully believed that______.
A:he found the exact cause of learning disabilities
B:the problem of learning disabilities did not lie in the left side of the brain
C:the problem of learning disabilities resulted from the left side of the brain
D:the problem of learning disabilities was not limited to the left side of the brain

共用题干
Learning Disabilities
Learning disabilities are very common.They affect perhaps 1 0 percent of all children.Four times as many boys as girls have learning disabilities.
Since about 1970,new research has helped brain scientists understand these problems better.Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things.There is no longer any question that all learning disabilities result from differences in the way the brain is organized.
You cannot look at a child and tell if he or she has a learning disability.There is no outward sign of the disorder.So some researchers began looking at the brain itself to learn what might be wrong.
In one study,researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things.One involved cells in the left side of the brain,which control language.These cells normally are white.In the learning disabled person,however,these cells were gray.The researchers also found that many of the nerve cells were not in a line the way they should have been.The nerve cells were mixed together.
The study was carried out under the guidance of Norman Geschwind,an early expert on learning disabilities, Doctor Geschwind proposed that learning disabilities resulted mainly from problems in the left side of the brain. He believed this side of the brain failed to develop normally.Probably,he said,nerve cells there did not connect as they should.So the brain was like an electrical device in which the wires were crossed.
Other researchers did not examine brain tissue.Instead,they measured the brain's electrical activity and made a map of the electrical signals.
Frank Dully experimented with this technique at Children's Hospital Medical Center in Boston.Doctor Dully found large differences in the brain activity of normal children and those with reading problems.The differences appeared throughout the brain.Doctor Dully said his research is evidence that disabilities involve damage to a wide area of the brain,not just the left side.

According to the passage we can conclude that further researches should be made______.
A:to help learning-disabled children to develop their intelligence
B:to study how children learn to read and write,and use numbers
C:to investigate possible influences on brain development and organization
D:to explore how the left side of the brain functions in language learning

下列哪些不属于颈浅丛属支 ( )

A.lesser occipital nerve
B.great auricular nerve
C.transverse nerve of nerve
D.supraclavicular nerve
E.trochlear nerve

共用题干
Parkinson's Disease

1 Parkinson's disease affects the way you move.It happens when there is a problem with certain nerve
cells in the brain. Normally , these nerve cells make an important chemical called dopamine（多巴胺）. Dopa-
mine sends signals to the part of your brain that controls movement.It lets your muscles move smoothly and
do what you want them to do.When you have Parkinson's,these nerve cells break down.Then you no longer
have enough dopamine,and you have trouble moving the way you want to.
2 No one knows for sure what makes these nerve cells break down.But scientists are doing a lot of re-
search to look for the answer. They are studying many possible causes,including aging and poisons in the en-
vironment.Abnormal genes seem to lead to Parkinson's disease in some people.But so far,there is not enough
proof to show that it is always inherited.
3 Tremor（颤抖）may be the first symptom you notice.It is one of the most common signs of the
disease,although not everyone has it.Tremor often starts in just one arm or leg or only on one side of the
body.It may be worse when you are awake but not moving the affected arm or leg. It may get better when you
move the limb or when you are asleep.In time,Parkinson's affects muscles all through your body,so it can
lead to problems like trouble swallowing or constipation（便秘）.In the later stages of the disease , a person
with Parkinson's may have a fixed or blank expression,trouble speaking,and other problems.Some people
also have a decrease in mental skills.
4 At this time,there is no cure for Parkinson's disease.But there are several types of medicines that
can control the symptoms and make the disease easier to live with.You may not even need treatment if your
symptoms are mild.Your doctor may wait to prescribe medicines until your symptoms start to get in the way of
your daily life.Your doctor will adjust your medicines as your symptoms get worse.You may need to take
several medicines to get the best results.

Paragraph 1__________
A:Means of Diagnosis of the Disease
B:Tips for Patients With the Disease
C:Common Treatment for the Disease
D:Definition of Parkinson's Disease
E:Possible Causes of the Disease
F: Typical Symptoms of the Disease

共用题干
A Minor Microsurgery Last year,Sean Martinovich,from Whitianga,had life-saving surgery when a golf-sized tumor was removed from his brain stem.But the operation left half his face paralysed.He talked with a slur,sometimes dribbled（流 口水）out of the side of his mouth and could not close his eye properly.Although he could run around with the other boys in the playground,when they laughed he could not laugh with them.Without a smile,he could suffer psychologically and emotionally. Last week,6-year-old Sean had seven hours of microsurgery that should give him back his smile.Doctor Bartlett removed a nerve from the back of one of Sean's legs and transplanted it into his face.On the normal side of his face the nerve divides into lots of little branches."We'll cut those nerve branches and then we'll take a nerve graft from one leg and tunnel it across his face from one side to the other and join that on to the nerve that' s been cut on the good side of his face."Doctor Bartlett said before the operation."If this was not fixed he conld face physical and emotional problems as he got older,"Doctor Bartlett said."Socially people can become quite withdrawn because of the face paralysis.It's easy for people,especially children,to become rather emotionless because they prefer the flatness of no movement on either side to the weirdness of an asymmetry of smiling on one side and having this twisted face." Sean is not smiling yet.Over the next six months the nerves will grow across the face to the damaged side and after that movement will hopefully come back.Sean's parents,Steve and Wendy Martinovich,said they had been through a year of hell.But their son was a determined boy who just got on with it,said Mrs Martinovich.They are amazed at the technology that they hope will restore the cheeky smile they love so much.For Doctor Bartlett the microsurgery is almost routine.For Sean's parents,it is a miracle.

Doctor Bartlett transplanted a nerve into Sean Martinovich's face which was removed from his______.
A:leg
B:back
C:the normal side of his face
D:brain