There are two types of twins; identical and non-identical twins. Identical twins are formed from a single egg in mother’s body which divides to from two separate babies. Identical twins look the same, and are often dressed by their parents in clothes of the same colors. It is often difficult to tell identical twins from each other, even when they are standing side by side. Non-identical twins come into being when the mother produces two separated eggs a the same time, both of which grow to form babies. In this case the twins look like normal brothers and sisters and are easy to tell one from the other.
  In the 1970s and 1980s a scientist did some research into twins. He invited many pairs of identical twins to university and asked them to take part in a week of tests. He was particularly interested in adopted (收養(yǎng)) twins who had been separated at birth. He would give the twins different kinds of tests to study their speed of thinking, their speech, their memory, the ways they saw and heard different things, and so on. Time and time again he found separated twins who preferred clothes of the same color, used the same kind of shaving soap, wore the same shaped square glasses and the same colored socks.
  There is a third type of twins, but it is a very unusual one. Twins which are joined together at birth are known in western countries as Siamese twins.
小題1:It is difficult to tell identical twins apart because _______.
A.they are dressed in the same clothesB.they are dressed in the same color
C.they are very alikeD.they are standing side by side
小題2:If the twins are easy to tell from each other, they are ______.
A.very probably non-identical twinsB.surely identical twins
C.surely identical twinsD.a(chǎn)lways a brother and a sister
小題3:Which of the following is NOT true according to this passage?
A.In the 1970s and 1980s a scientist did some research into the two main types of twins.
B.In the week of tests, he tested their speed of thinking, their speech, their memory and some other things.
C.There were twins who had been separated from each other as soon as they were born.
D.Very often, separated twins were found to choose things of the same kind, the same shape and the same color.
小題4:This passage mainly tells us _______.
A.the main types of twinsB.what has been found out about twins
C.how twins are formedD.how a scientist studied twins

小題1:C
小題1:A
小題1:A
小題1:B
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:不詳 題型:閱讀理解

閱讀下面短文,并根據(jù)短文后的要求答題(請注意問題后的字?jǐn)?shù)要求)。
[1]Global difference in intelligence is a sensitive topic, long filled with a large number of different opinions. But recent data has indeed shown cognitive (認(rèn)知的) ability to be higher in some countries than in others. What's more, IQ scores have risen as nations develop—a phenomenon known as the "Flynn effect". Many causes have been put forward for both the intelligence difference and the Flynn effect, including education, income, and even non-agricultural labor. Now, a new study from researchers at the University of New Mexico offers another interesting theory: intelligence may be linked to infectious-disease rates.
  [2]The brain, say author Christopher Eppig and his colleagues, is the "most costly organ in the human body". Brainpower consumes almost up to 90 percent of a newborn's energy. It's clear that if something affects energy intake while the brain is growing, the impact could be long and serious. And for vast parts of the globe, the biggest threat to a child's body—and therefore brain—is parasitic (由寄生蟲引起的) infection. These illnesses threaten brain development________________. They can directly attack live tissue, which the body must then try every means to replace. They can invade the digestive pipe and block nutritional intake. They can rob the body's cells for their own reproduction. And then there's the energy channeled (輸送) to the immune system to fight the infection.
  [3]Using data on national "disease burdens" (life years lost due to infectious diseases) and average intelligence scores, the authors found they are closely associated. The countries with the lowest average IQ scores have the highest disease burdens without exception. On the contrary, nations with low disease burdens top the IQ list.
  [4]If the study holds water, it could be revolutionary for our understanding of the still-confusing variation in national intelligence scores.
小題1:What is the main idea of the text?(no more than 10 words)________________________
小題2:Complete the following statement with proper words.(no more than 4 words)
  Those countries that have the ________________ are always at the bottom of the  IQ list.
小題3:Fill in the blank in Paragraph 2 with proper words.(no more than 5 words)
___________                                                                
小題4:What can cause intelligence difference?(no more than 8 words)
  ________________________________________________________________________
小題5:What does the word "they" (Line 2, Paragraph 3) probably refer to?(no more than 8 words)
________________________________________________________________________

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Science has told us too much about the moon that it is fairly easy to imagine what it would be like to get there. It is certainly not a friendly place. Since there is no air or water, there can be no life of any kind. There is not much variety of scenery either. For mile after mile there are only flat plains of dust with mountains around them. Above, the sun and stars shine in the black sky. If you step out of the mountain shadow, it means moving from the severe cold into intense (強(qiáng)烈的) heat. These extreme temperatures continually break rocks away from the surface of the mountains. The moon is also a very silent world, for sound waves can only travel through air. But beyond the broken horizon, you see a friendly sight. Our earth is shining more brightly than the stars. From this distance, it looks like an immense (巨大的) blue, green and brown ball.
小題1:The moon is an unfriendly place because                   .
A.there is no air, no water, no life, no sceneryB.the sun and stars shine in the sky
C.temperature breaks rock awayD.a(chǎn)ll of the above
小題2:Without           , the moon is a silent world.
A.manB.a(chǎn)irC.soundD.water
小題3:According to the passage we know that             .
A.the earth looks like a colored ball
B.we can enjoy the scenery on the moon
C.every inch of the moon is very hot
D.the extreme temperature breaks rocks away from the surface of mountains
小題4:We can conclude(斷定) that “continually” means          .
A.sometimesB.a(chǎn)lwaysC.without breakD.frequently
小題5:The best title for the passage is                        .
A.An Unfriendly and Friendly PlaceB.The Geography of the Moon
C.Moon, a Silent WorldD.The Moon

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Crossroads International
How does Crossroads work?
Crossroads is a resource network. We take goods Hong Kong doesn’t want and give them to people who badly need them. We collect those goods and give them out in the welfare arena(福利院) in Hong Kong, Mainland China, elsewhere in Asia, Eastern Europe and Africa. So Crossroads is just that: a Crossroads between need and resource.
Who do we help?
The welfare agencies we help do not run on large budgets(預(yù)算). They are grass-root groups who have seen a need and tried to meet it. They can’t get the job done without back-up, though, so our task is to help them do their task. Our warehouse is full of goods, from computers to high chairs, clothing to books, stationery(文具) to medical provision, cupboards to dinning sets. They send us a list of their needs and we try to match it with the resource we have in stock.
How do we operate?
Crossroads itself also operates on a low budget. We do not buy the goods we send. They are donated. Similarly, rather than raising funds for freight(貨運(yùn)),we ask transport companies to donate their services. Nobody in our organization receives a salary. Even our full-time staff works on a voluntary basis.
Those that donate goods and services:
·Factories·Manufacturers ·Hospitals ·Hotels ·Householders
·Offices ·Other Charities ·Transport Companies ·Educational Institutions
One resource that we are always in need of is people. While we receive large quantities of goods and there is never a short supply of requests for them, we are always in need of hands to help sort and prepare them for shipping.
What can I do?
We are always in need of people. We have a lot of tasks. If you are volunteering regularly, we can offer work in some of the following categories, some of the time. You are welcome to number your top three choices and we will do our best to accommodate them.
·Clothing categorization ·Sewing ·Toy categorization ·Furniture handling
·Driving ·Book categorization ·Household goods categorization ·Office work
·Electrical goods categorization ·Book keeping ·Fund- raising
·Stationery categorization ·Medical categorization
Where to find us?
All volunteer work is done at out warehouse:
Located in Basement Zone M of the Kai Tak Government Building
Our warehouse hours: Tues.-Sat. 10:00am-5:30pm
Postal address: 16 Man Tong, Silvermine Bay, Lantau Island, HK
Office details: Ph: 2984 9309, 2740 9657
小題1:Crossroads International is            .
A.a(chǎn) welfare agencyB.a(chǎn) place to store goods donated
C.a(chǎn)n organization to collect goods for those who need them
D.a(chǎn)n organization run by the government
小題2: People in poor areas can’t get help from the Crossroads if they need            .
A.toys and booksB.furniture and computers
C.fresh water and foodD.clothes and washing machines
小題3: Which of the following is not the choice if you decide to offer help?
A.DrivingB.FundraisingC.Furniture handlingD.Teaching
小題4:The purpose of this brochure(小冊子) is mainly to            .
A.look for volunteers to work for CrossroadsB.call on people to donate more goods
C.let people know what Crossroads International isD.tell people what Crossroads can provide
小題5:From the above brochure, we can conclude that              .
A.people who work at Crossroads get low pay from it
B.Crossroads doesn’t give goods directly to the people who need them
C.You can do whatever you like if you offer help at Crossroads
D.Crossroads has collected more goods than needed

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

During the years after the terrorist attack on the World Trade Center, structural engineers have been trying hard to solve a question that would otherwise have been completely unthinkable: Can building be designed to stand catastrophic blasts (攻擊;爆破) by terrorists?
Soon after the terrorist attacks on the twin towers, structural engineers from the University at Buffalo and the Multidisciplinary Center for Earthquake Engineering Research (MCEER) traveled to ground zero as part of a project funded by the National Science Foundation. They spent two days beginning the task of formulating (構(gòu)思) ideas about how to design such structures and to search for clues on how to do so in buildings that were damaged, but still are standing.
“Our objective in visiting ground zero was to go and look at the buildings surrounding the World Trade Center, those buildings that are still standing, but that sustained damage,” said Mr. Bruneau, Ph.D. “Our immediate hope is that we can develop a better understanding as to why those buildings remain standing, while our long-term goal is to see whether earthquake engineering technologies can be married to existing technologies to achieve enhanced performance of buildings in the event of terrorist attacks,” he added.
Photographs taken by the investigators demonstrate the monumental damage to the World Trade Center towers and buildings nearby. One building a block away from the towers remains standing, but was badly damaged. “This building is many meters away from the World Trade Center and yet we see a column (柱子) there that used to be part of that building,” explained A. Whittaker, Ph.D. “The column became a missile that shot across the road, through the window and through the floor.”
The visit to the area also brought some surprises, according to the engineers. For example, the floor framing (框架) system in one of the buildings was quite strong , allowing floors that were pierced by tons of falling debris (殘礫) to survive. “Good framing systems may provide a simple, but reliable strategy for blast resistance,” he added. Other strategies may include providing alternate paths for gravity loads in the event that a load-bearing column fails. “We also need a better understanding of the mechanism of collapse,” said A. Whittaker. “We need to find out what causes a building to collapse and how you can predict it.”
A. Reinhorn, Ph.D. noted that “earthquake shaking has led to the collapse of buildings in the past. Solutions developed for earthquake-resistant design may apply to blast engineering and terrorist-resistant design. Part of our mission now is to transfer these solutions and to develop new ones where none exist at present.”
小題1:The question raised in the first paragraph is one _____ .
A.that was asked by structural engineers a month ago
B.that is too difficult for structural engineers a month ago
C.that was never thought of before the terrorist attack
D.that terrorists are eager to find a solution to
小題2:The column mentioned by Dr. Whittaker _____ .
A.was part of the building close to the World Trade Center
B.was part of the World Trade Center
C.was shot through the window and the floor of the World Trade Center
D.damaged many buildings near the World Trade Center
小題3:A surprising discovery made by the investigators during their visit to ground zero is that _____.
A.floors in the faraway buildings remained undamaged
B.some floor framing systems demonstrate resistance to explosion
C.complex floor framing systems are more blast resistant
D.floors in one of the buildings were pierced by tons of debris
小題4: What Dr. Reinhorn said in the last paragraph may imply all the following EXCEPT that _____.
A.blast engineers should develop new solutions for terror-resistant design
B.blast engineering can borrow technologies developed for terror-resistant design
C.solutions developed for earthquake-resistant design may apply to terrorist-resistant design
D.blast engineering emerges as a totally new branch of science

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Before a new type of airplane goes into service, every part of it is tested again and again. But there are two tests that are more important than all the others.
The first is called the " tank(貯水池) test". A modem airplane must fly very high in the sky. Air must be pumped into the plane so that the passengers can breathe. The metal structure (結(jié)構(gòu))of the plane has to be very strong for this reason. When the plane is filled with air, the air presses against the skin of the plane inside. The pressure (壓力) on a small window is like a huge foot that is try­ing to get out. If a small part of the plane were to fail, the plane would explode (爆炸)in the sky. To test the structure of the plane, the plane is lowered into a huge tank or container of water. Then it is filled with air.  The pressure inside the plane is greater than it ever will be when it is high up in the air. Finally, there is an explosion. This does not cause so much damage inside the water tank as it would anywhere else. Engineers can discover which part of the plane has broken. Then that part is made stronger. 
The most dangerous test happens when the new plane is going through test flights in the air. The pilot must find out exactly what happens when the engines (發(fā)動機(jī)) are all shut off at once. The plane begins to fall like a stone. It is the pilot’s job to find out how he can get control of the plane again. These two tests are examples of how planes are made safe before they ever carry passengers.
小題1:By doing the "tank test", the engineers can find out _______.
A.the amount of air in the planeB.the strength of the plane structure
C.the pressure inside and outside the planeD.the power of the airplane engines
小題2:What will happen to the plane under the "tank test"?
A.It will be broken.B.It will be made stronger.
C.It will be filled with water.D.It will be tested by pilots,
小題3:According to the text, why are test flights most dangerous?
A.The plane may explode in the air.B.The pilot may lose control of the plane.
C.The engines may be damaged.D.Too much air may get into the plane.
小題4:What might be the most suitable title for the text?
A.Two Important Tests on Airplanes B.The Importance of Flying Safely
C.The Danger of Testing Airplanes D.How Airplanes Are Made and Tested

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Cities in Europe and around the world may be growing “bike trees” in the near future. Invented by Japan’s JFE Engineering Corp, the invention proved useful in the busiest parts of this nation’s crowded cities.
Local governments of Japan have struggled for ways to encourage people to park their bikes considerably, particularly close to big stations, but that may block some roads and entrances to homes and businesses. “Our cities do not have a lot of space for any kind of parking, including bicycles.” said Mitsuharu Oshima, a spokesman for JFE Engineering. The bike tree comes in two types: one in a tower that is above ground and on the contrary, the other in an underground structure.
A cyclist registers with the operator of the equipment, pays a monthly fee and pushes the wheels of his bicycle into restraints(管理處) at the base of the bike tree. Each bicycle is fitted with an electronic card with the owner’s details. A mechanical arm then pulls the bike into the base of the tower and moves it to a free location inside. To collect the bike later, the cyclist puts his card through a reader and his bike is automatically returned to him in seconds. “The science of the equipment has been difficult —— even though they may look quite simple —— because bikes come in many different shapes and sizes.” said Oshima.
As well as clearing away the road, bicycles cannot be stolen from a bike tree. There are presently versions at seven sites in Japan and two others are under construction, while work is under way on an even larger version —— with room for 9400 bicycles —— in Thailand. And Oshima believes that the idea could catch on in Europe, particularly in countries such as France, Holland and Denmark , where cycling is so popular.
小題1: Cities build this kind of “bike trees” so that they can _______.
A.a(chǎn)sk more people to ride bikesB.provide more jobs for people
C.make more money than beforeD.save more room for people
小題2:Which is the right order of the following things when you use the bike tree?
① the wheels of the bicycle are put into restraints at the base .
② the card is read and the bike is automatically returned .
③ an electronic card with the owner’s details is given
④ the bike is pulled and moved to a free location inside .
A.③②①④B.③①④②C.②①④③D.②④③①
小題3: What made it difficult to design “bike trees”?
A.The location of “bike trees”.B.The method of finding enough bikes.
C.The differences of the bikes.D.The importance of traffic safety
小題4: From the passage, we can know that _______.
A.countries with many cyclists in Europe will like the idea of “bike trees”
B.there are seven “bike trees” used for holding bikes in Japan
C.local government of Japan encourage people to ride bikes
D.cyclists can use “bike trees” for free in Japan.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

The Future of Education
David Kelly, founder of the Design School Stanford, said, “In the classroom of the future, education will be custom-made for each student. Every child will have a laptop programmed for his or her learning style and speed. At the same time, more students will go out into the community to learn from business owners. And you’ll see more retirees in the schools as teachers.”
A New Way to Pay
Turn your cell phone into a “mobile wallet” and speed through the checkout line. With a smart phone that uses the same technology as “tap and go” cards, you’ll be able to access your financial data fast. You can select a credit or debit card(借記卡)from the screen, and then tap the phone on the checkout console(操縱臺;控制臺).
High-Tech Guitar
A 26-year-old Australian designer has invented a brand-new way to be a rock star. The Misa Digital Guitar’s fret board looks like a traditional six-string’s but with no strings attached. There’s a touch pad (墊)where the sound hole normally is, and instead of plucking strings,(彈弦) you tap, drag, or brush the pad to “play” the instrument electronically.
The Future of Phones
Jason Chen, editor of the website gizmodo.com, makes his prediction. “Data connections will get even faster, and you’ll be linked to your environment by cell phone. Fcr example, when you go on vacation, you can point your phone at a monument(紀(jì)念碑) and it will give you information about what you’re looking at.’
Needle-Free Vaccines(無針接種)
Boston University researchers are working on a new method of inoculation(接種)—no injection necessary. A mild electrical charge from a small device, shaped like a gun, is used to drive the particles(粒子) into the body. The new idea beats the old needle method.
小題1:The passage mentions the following EXPECT        .
A.paymentB.medicineC.educationD.music instrument
小題2:What can we learn from the text?
A.Even a man with no music knowledge can be a rock star in the future.
B.Students should go out into the community to learn from business owners instead of staying at school to learn from books.
C.We can carry no cash while shopping in the future.
D.We can feel more pain with the method of inoculation.
小題3:In which column can we read the passage?
A.Entertainment.B.Production.
C.Technology. D.Work.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

You know that pearls grow inside oysters(牡蠣), but would you ever think to look for diamonds inside an ostrich(鴕鳥)? Well, a hunter once shot an ostrich and discovered, to his great surprise, that the big bird had swallowed a bunch of diamonds. How could such a strange thing happen?
Like many other birds, the ostrich swallows small stones that stay inside its “gizzard”. The gizzard is a bird’s second stomach. It is where the food is ground up. The small stones help to grind up the food so it can be digested. The small stones do the chewing because birds don’t have teeth. In that case of the ostrich with the diamonds, the bird simply had expensive taste in rocks. It used the diamonds to digest its dinner.
Diamonds and stones aren’t all that an ostrich will swallow. If there are no stones around, it will eat just about anything. Sadly for ostriches in zoos, this can be a fatal habit. The tendency to swallow anything it sees has caused the death of many an ostrich. Cruel or careless people often throw things into the bird’s living space. They throw keys, coins, and even large objects such as horseshoes. The ostrich swallows them without hesitation. Coins can be the worst. Inside the ostrich they wear down to a razor-sharp edge. They will cut open the bird’s gizzard from the inside. When one young zoo ostrich died, 484 coins weighing more than eight pounds were found in its gizzard.
小題1:
Which of the following best expresses the main idea of the passage?
A.Birds often eat strange and funny things.
B.Ostriches will swallow anything to help them digest food.
C.One ostrich died with 484 coins in its gizzard.
D.Ostriches are often hurt by cruel or careless people.
小題2:
The ostrich is not smart enough to ______.
A.digest its own foodB.eat only diamonds
C.a(chǎn)void eating harmful objectsD.escape from the zoo
小題3:
The sentence “the small stones do the chewing” makes rocks seem as though they were ______.
A.importantB.a(chǎn)live
C.dangerousD.uncomfortable
小題4:
he word “fatal” in the third paragraph is another word for “______”.
A.foolishB.carelessC.deadlyD.cruel

查看答案和解析>>

同步練習(xí)冊答案