Do you know that women’s brains are smaller than men’s? Normally the women’s brain weighs 10% less than men’s. Since research has shown that the bigger the brain, the cleverer the animal, men must be more intelligent（聰明的） than women. Right? Wrong. Men and women always score similarly on intelligence tests, despite the difference in brain size. Why? After years of study, researchers have concluded that it’s what’s inside that matters, not just the size of the brain. The brain is made up of “grey matter” and “white matter”. While men have more of the white matter, the amount（數(shù)量）of “thinking” brain is almost the same in both men and women.
It has been suggested that smaller brain appears to work faster, perhaps because the two sides of the brain are better connected in women. This means that little girls may learn to speak earlier, and that women can understand sorts of different information at the same time. When it comes to talking to the boss on the phone, cooking dinner and keeping an eye on the baby all at the same time, it’s women who come out on top every time.
There are other important differences between two sexes（性別）. As white matter is the key to spatial（空間的）tasks, men know better where things are in relation to other things. “A great footballer always knows where he is in relation to the other players, and he knows where to go,” says one researcher. That may explain one of life’s great mysteries: why men refuse to ask for directions … and women often need to!
The differences begin when fetuses（胎兒）are about nine weeks old, which can be seen in the action of children when they are very young. A boy would try to climb a barrier before him or push it down while a girl would ask for help from others. These brain differences also explain the fact that more men take up jobs that require good spatial skills, while more women speech skills. It may all go back to our ancestors, among whom women needed speech skills to take care of their babies and men needed spatial skills to hunt, according to one research.
小題1:Which of the following is TRUE according to Paragraph 1?
A．Grey matter controls thinking in the brain.
B．Men’s brain is 10% less than women’s.
C．Grey matter plays the same role as white matter.
D．Men and women have the same amount of white matter.
小題2:What can you infer from Paragraphs 2 and 3?
A．Men have weaker spatial abilities.
B．Women do not need to tell directions.
C．Women prefer doing many things at a time.
D．Women do many jobs at a time better than men.
小題3:What can you learn from Paragraph 4?
A．Our children needed more spatial skills.
B．Women may have more feelings than men.
C．Young boys may be stronger than young girls.
D．More women take up jobs requiring speech skills.
小題4: The passage is mainly about _______.
A．ways of being more intelligent
B．differences between men and women
C．studies on brains between two sexes
D．studies on white matter and grey matter

小題1:A
小題1:D
小題1:D
小題1:C

小題1:A 推理判斷。由第一段最后兩句可知。盡管男人有更多的后者（白質(zhì)），但是大腦的思考部分（當(dāng)然是灰質(zhì)）的量男女幾乎完全相等。A有很大的迷惑性，但仔細一看文章中說的是平均。
小題1:D 推理判斷。可采用排除法。女人在同時完成多項任務(wù)上有優(yōu)勢，并不是說女人喜歡同時干許多事情，因此A 錯。C 、D明顯與文章內(nèi)容不符。
小題1:D 推理判斷。由more men take up jobs that require good spatial skills, while more women speech skills（while more women take up jobs that require speech skills.）一句可知。
小題1:C . 考查文章大意。本文主要講述科學(xué)家對男女兩性大腦的研究，故選C。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源：不詳 題型：閱讀理解

“Millions of young people will lose their hearing in five years if they listen to MP3 or MP4 players at a too high voice every day,” scientists say recently.
Do you often listen to MP3 players at a too high voice? Are you frightened to hear this?
The sizes of MP3 players are very small, but small MP3 players make it easy to take hundreds of songs with you. So many young people carry them and listen to music every day. MP3 players are very popular among students. 
The scientists say teenagers should be far from high volume (音量), including mobile phones’ noise. A study says, “High volume and long listening time can cause hearing problems.” They think if young people listen at more than 89 decibels (分貝) every day, they will lose their hearing in five years. A scientist said, “So many young people often use personal music players and mobile phones at a high voice. I am afraid that they may be losing their hearing.
So let’s turn our MP3 players down!
小題1:According to the passage, which of the following is true?
A．Scientists tell young people to turn off their MP3 players.
B．Teenagers will lose their hearing if they listen to hundreds of songs in MP3 players.
C．A person will lose hearing in 5 years if he or she listens to an MP3 player every day.
D．The mobile phone can also cause hearing problems if we don’t use it correctly.
小題2:The underlined word “they” (Paragraph 4) most probably refers to ______.
A．scientistsB．MP3 playersC．mobile phonesD．teenagers
小題3:Which might be the best title for this passage?
A．Turn your MP3 players down!B．Never use MP3!
C．How to protect your hearing.D．Young people’s hearing.

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

We are learning English, but how can we learn English well? A student can know a lot about English, but maybe （可能）he can not speak English.
If you want to know how to swim, you must get into the river. And if you want to be a football player, you must play football.
So, you see, you can learn English only by using it. You listen to your teacher in class. You must read your lessons every day. You must speak English to your classmates and you must write in English，too. Then one day, you may find your English very good.
(     ) 12. You know a lot about English but maybe you ______.
A. can’t speak it                    B. can write it     
C. can’t study it                   D. can use it
(     ) 13. You must get into the river ______.
A. to learn how to swim            B. to play with water     
C. to go boating                  D. to catch a fish
(     ) 14. Do you want to be a football player? Please ______.
A. put your football away        B. buy a good football    
C. play football                 D. watch others play football
(     ) 15. How can we learn English well?
A.We must have a good English book.
B.We must have a good English teacher.
C.We must see more English films.
D. We must use it often.

查看答案和解析>>

科目：初中英語 來源：不詳 題型：完形填空

Sometimes you may not understand your parents. One minute they are friendly, the next minute they’re shouting and screaming loudly enough for the whole street to hear. So who makes them so____16___ ? You, probably!
Is your room untidy? Do you leave things on the floor? You may find it hard enough to keep one room tidy. So imagine what ___17___like for your mum and dad trying to keep a whole house in order.
When you take your clothes off, remember to ___18__. Get into the habit if taking glasses and plates down to the kitchen. Before long you’ll be doing it without thinking.
Even though you may not realize it, your parents have bought you many clothes. But they’re not buying themselves new things every week, are they? The simple truth is that there are more ___19___ things to spend money on, like the electricity bill and food.
You may hate missing a party to visit some boring old relatives. They may go on and on about what a sweet baby you were. You have no choice but to listen. Even if you ___20____, your parents won’t change their minds. Parents like to show off their family. The best thing you can do is to help entertain(使……高興) your relatives. Your parents will be so pleased with you afterwards that they’ll probably allow you to go to the next two ___21____.
You might not want to eat, but think of it from the parents’ point of view. If you cook two meals a day, it ___22____ 730 meals a year. Can you imagine how boring this can get? Imagine how your parents feel when you say you’re not really hungry. ___23____, your parents are probably worried that you aren’t eating enough.
Eat ___24___ snacks and leave room for your meals. Finally, offer to ___25___after the meal. Your offer may not be accepted, but your parents will be pleased.
小題1:
A．friendlyB．lonelyC．changeable D．comfortable
小題2:
A．it’sB．itC．they’reD．that’s
小題3:
A．hang them upB．leave them alone
C．put them onD．throw them away
小題4:
A．interestingB．difficultC．important D．surprising
小題5:
A．a(chǎn)greeB．complainC．listenD．win
小題6:
A．concertsB．meetingsC．classesD．parties
小題7:
A．takesB．costsC．spendsD．means
小題8:
A．In addition(加之)B．In return
C．At mostD．At last
小題9:
A．moreB．lessC．fewerD．many
小題10:
A．do the cookingB．lay the table
C．buy some snacksD．wash the dishes

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Today there are 6.4 billion people on the earth. By the year 2050 there may be 12.5 billion . There are a lot of people to feed. We need more  and more food.
One way to produce more food is growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic（遺傳的） material. Foods from plants grown in this way are called genetically modified(改變的) foods, or GM foods.
By changing the genetic material of a plant, it is possible to make new plants. They make plants which are strong against plant diseases. They can also help in our diseases; a kind of rice is being prepared , for example , which stops people becoming blind.
Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.
GM plants are not natural. No one knows how good or bad they are,. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them, because they are unnatural. They may feed people , then hurt them or their children later. But both rich and poor countries are interested in their use, and they are not going to go away. In 2050, we may think differently about them.
小題1:GM foods are made by                 
A. farmers            B. workers      C. scientists          D plants
小題2:What are the good things about GM foods  ?
A. They make plants strong against diseases.   B. They are unnatural.
C. They can help in human diseases.            D  Both A and  C.
小題3:GM foods        .
A. are a quick way to produce food    B. grow in the wild 
C. are safe                           D are grown only in rich countries
小題4:Why do some people not like GM foods?
A. They are not useful.       B. They are not helpful.
C. They are not natural.      D  They are not cheap.
小題5:From the passage we know that      .
A．GM foods will disappear one day in the future
B．GM foods will not disappear in the future
C．People will not be interested in GM foods.
D．People will have to stop using GM foods

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Can you imagine a classroom without one thing that has long been considered a necessary part? No notebooks, no textbooks, no test papers. Nor are there any pencils or pens, which always seem to run out of ink at the critical moment.
A “Paperless classroom” is what more and more schools are trying to realize. Students don’t do any handwriting in this class. Instead, they use hand-sized or specially-designed computers. The teacher downloads texts from Internet libraries and sends them to every student’s personal computer.
Having computers also means that students can use the Web. They can look up information on any subject they’re studying, from maths to social science.
A high school teacher, Judy Herrel in Florida, US, described how her class used the Web. “Using a book that’s three or four years old is impossible,” she said.
A paperless classroom is a big step towards reducing the waste of paper.
“Think about the money and trees we could save with the computers,” she said.
But, with all this technology, there’s always a risk that the machines will break down. So, in case of a power failure or a technical problem, paper textbooks should still be widely available (可得到的) for these students.
小題1:The underlined word “critical” in the first paragraph probably has the same meaning as _______.
A．worryingB．dangerousC．happyD．important
小題2:You are sure to find __________ in a paperless classroom.
A．pensB．computersC．test papersD．notebooks
小題3:According to Judy Herrel, __________.
A．the Web can talk the students everywhere
B．the Web can take the place of teachers
C．the Web is a better tool for information
D．the Web is for downloading information
小題4:The paper textbooks should still be widely available because __________.
A．students won’t have trouble with their pens
B．computers may break down sometimes
C．students may not get all information from the Internet
D．paper textbooks may give students more information

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Liu Xu is a student from a middle school in Guangxi. Once he was riding home when a  robber (盜賊) suddenly jumped out from the roadside. He pulled Liu Xu off his bike and rode away. Liu Xu was scared, but he didn’t run after the robber. He found a telephone and called the police at 110.
“Safety is the first important in such a situation,” Liu said, remembering what his teacher had told him in his first aid class. “It is not safe to run after an adult who is stronger than you.”
Liu’s school has compulsory (必修的) first aid education. Students must take the class once a week.
Teenage safety has become a serious issue recently. According to a survey, about 16,000 teenagers die in accidents in China every year.
At Liu’s school the first aid classes are to “teach students skills how to protect and save  themselves in emergencies (緊急情況)”. Students there often learn by role-playing in first aid classes. For example, one student performed as a stranger knocking at a door. Another one stood inside the door and asked several questions before letting the “stranger” in. Then they changed roles and did it again. They learned a lot while having fun at role-playing.
The topics of the first aid classes are regularly updated (適時的). The students have learned skills for surviving in earthquakes. The teacher also taught the students not to go out at night. If someone tried to do bad things to them, they should quickly run into crowed place.
小題1: Liu Xu’s _________ was robbed according to the passage.
A．moneyB．bikeC．backpackD．mobile phone
小題2:What did Liu Xu remember when he met the robber?
A．Safety is the first important.B．How to run away from an earthquake.
C．To run after the robber quickly.D．Not to go out at night.
小題3:Students in Liu’s school must have compulsory first aid class __________.
A．once a dayB．twice a dayC．once a weekD．twice a week
小題4:The underlined word “stranger” is __________ here.
A．a(chǎn) robberB．a(chǎn) studentC．a(chǎn) teacherD．a(chǎn) real stranger
小題5:The best title for the passage is __________.
A．Teenage SafetyB．A Robbery (搶劫)
C．Importance of SafetyD．Life-saving Classes

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解


After spending years searching for a planet with life, scientists may have found one. In September 2010, a team of US scientists discovered an Earth-sized planet called Gliese 581g. It has a surface temperature neither too hot nor too cold for liquid（液態(tài)）water. Scientists think there is a chance that the planet could have life.
The planet Gliese 581g goes around a star called Gliese 581, which is about 20 light-years from Earth. That is about 194 trillion（萬億）kilometres －500 million times farther away from us than the moon.
A spacecraft traveling at a one-tenth of the speed of light would reach Gliese 581g within about 220 years. A human can’t live that long, but robotic explorers could make the job easier. However, our fastest spacecraft don’t come anywhere near that one-tenth light-speed mark.
At present, scientists don’t know what the surface might be like on Gliese 581g. What they know is that the planet is at the sight distance from its star to have liquid water. It’s also at the right distance to have an atmosphere that could protect the water if it is on the surface.
Although spacecraft won’t be getting there anytime soon, one way to look for life on Gliese 581g is to turn our radio telescopes（望遠鏡）towards the planet and search for radiation（放射）. By studying the radiation, scientists would find out about the chemicals（化學(xué)物質(zhì)）around the planet and discover it Gliese 581g has an atmosphere. If it has one, studying the atmosphere would give us a good idea if the planet has life or not. But it’ll probably be many years before we can do this properly.
People have been arguing about whether there is alien life on Gliese 581g. Any discussion about alien life is just guessing at this point, according to its discoverers.
小題1: What did scientists find in September 2010?
A．A planet with water. B．A planet similar to the earth.
C．A planet without life.D．A planet near the earth.
小題2:According to the article, Gliese 581g ________.
A．is at the right distance from its starB．moves around the earth
C．is as far away from us as the moonD．can be reached in about 220 years
小題3: Paragraph 5 is mainly about ______.
A．the possibility of living on Gliese 581g
B．the kinds of chemicals around Gliese 581g
C．the way of looking for life on Gliese 581g
D．the aim of studying the radiation on Gliese 581g
小題4:Which of the following is the best title for the passage above?
A．Gliese 581g, a Likely Living PlanetB．Gliese 581, a Likely Living Planet
C．Gliese 581g and Its StarD．Gliese 581g and Radiation

查看答案和解析>>

科目：初中英語 來源：不詳 題型：閱讀理解

Dolphins are our friends. They can use tools to solve problems although they don't have hands.   For example, scientists have ever found that a dolphin can make a shy eel(鰻魚) come out of its hole with a dead fish.
Dolphins use different sounds to exchange information with each other. Scientists in Hawaii have developed a sign language to give instructions to dolphins, and the results are amazing. They find that dolphins not only understand the meaning of individual (個別的) words, but also understand the importance of word order in a sentence.
Most animals enjoy playing — but dolphins seem to like making their games as challenging as possible. On a beautiful day in 1997, scientists at a beach watched a little dog going into the sea and swimming towards the dolphins. To their surprise, the dolphins came up to the dog and then started throwing it into the air. The dog seemed to enjoy the "game" and continued playing with the dolphins for more than an hour.
Dolphins live in a very different world from ours, but they are very good at our "IQ tests” . For example, they will jump out of the water when they hear a whistle (口哨) noise. They do this because they will get a fish as a prize.
There is still much to learn about these cute problem-solvers, but it is certain that watching a dolphin show is fun.
根據(jù)短文內(nèi)容，選擇最佳答案。（5分）
小題1: What can a dolphin use to make an eel come out of its hole?
A．Its mouth. B．Its head. C．A dead fish. D．A little dog.
小題2:How do dolphins exchange information with each other?
A．By using tails. B．By using tools.
C．By using words. D．By using sounds.
小題3:Where did the dolphins throw the dog when playing?
A．Onto its back.B．Into the air.
C．Onto the beach. D．Into the water.
小題4:Why do the dolphins jump out of the water when they hear a whistle noise?
A．Because they want to get a fish as a prize.
B．Because they enjoy playing on the water.
C．Because they want to play with other dolphins.
D．Because the dolphin keepers want them to come out.
小題5: Which of the following is TRUE according to the passage?
A．Dolphins understand many languages.
B．Dolphins are a kind of clever animals.
C．Scientists have known dolphins well enough.
D．Dolphins seem to make their games relaxing.

查看答案和解析>>

同步練習(xí)冊答案