Of all the websites, one that has attracted attention recently is myspace.com. Most of this attention has come from the media and tells every reason why the website should be shut down. The danger of internet predators(竊掠者) is indeed a tough reality, but shutting down the site is not the answer. If myspace.com were shut down, another site would quickly take its place. Therefore, the right way is to teach teens how to use the site safely and educate them about who may be predators and how to avoid them.
The key to staying safe on the Internet is to make sure that your profile(個(gè)人資料) is secure. The simplest way is to change the privacy setting on your profile to “private”, which protects your information so that only the people on your friend list can view it. Although this is effective, it is not perfect. Predators can find ways to view your profile if they really want to, whether through hacking(非法侵入) in or figuring out their way onto your friend list. Thus, you should never post too much personal information. Some people actually post their home and school addresses, date of birth, and other personal information, often letting predators know exactly where they will be and when. The safest information is your first name and province. Anything more is basically inviting a predator into your life.
Another big problem is photos. I suggest completely skipping photos and never posting a photo of a friend online without asking permission.
Most importantly, never, under any circumstances, agree to a real-life meeting with anyone you meet online. No matter how well you think you know this person, there are no guarantees that they have told the truth. But you could feel free to chat with people you meet on the site, but just remember that not everyone is who they say they are. Hopefully, the next time you edit your profile, you’ll be more informed about the dangers of Internet predators and take the steps to defend yourself.
Lastly, do not send money to anyone you meet online. A common scam among Internet criminals is to request to pay for “expensive Internet charges” or “unreasonable Internet cafe fees”. While it is indeed true that many countries in Eastern Europe, Asia, Africa and South America do not yet have Internet service readily available in all cities and towns, a sincere friend from one of these countries will be more than happy to pay their own Internet charges. Never, under any circumstances, should you send money to a stranger from another country(or within your own country for that matter) who claims monetary assistance is required to continue their contact with you.
【小題1】Kids can avoid web predators successfully by________.

A.a(chǎn)ttracting more public attention 
B.shutting down the “myspace.com” 
C.learning different ways to try other sites 
D.recognizing and getting away from them 
【小題2】68. We can learn from the text that________.
A.everybody you meet online isn’t honest and reliable 
B.it is not acceptable to post a photo of a friend online 
C.it is not safe to chat with grown-ups on the website 
D.only you and your friends can view your personal profile 
【小題3】What does the underlined word “scam” in the last paragraph mean?
A.A thing that you can have two choices. 
B.An unpleasant task that tests one’s ability. 
C.A possibility of something happening. 
D.An illegal plan for making money. 
【小題4】What could be the best title of this passage?
A.Personal Safety. B.Web Safety for Teens. 
C.Web Hackers in the past. D.Predators’ Tricks. 


【小題1】D
【小題2】A
【小題3】D
【小題4】B

解析試題分析:網(wǎng)上安全問(wèn)題是一個(gè)現(xiàn)實(shí)問(wèn)題。某個(gè)網(wǎng)站一旦出了問(wèn)題就把它關(guān)閉掉,這不是解決問(wèn)題的辦法。因?yàn)殛P(guān)了這家就會(huì)有另一家取而代之。解決網(wǎng)上安全問(wèn)題正確的辦法是教育青少年如何安全使用網(wǎng)絡(luò),教育他們有關(guān)識(shí)別“誰(shuí)有可能是網(wǎng)上竊掠者,如何來(lái)避免他們的竊掠”。因此本文就“網(wǎng)上安全問(wèn)題”提出了三點(diǎn)建議。
【小題1】D 推理判斷題。根據(jù)“Therefore, the right way is to teach teens how to use the site safely and
educate them about who may be predators and how to avoid them.(所以正確的方法是教育青少年如何
安全使用網(wǎng)絡(luò),教育他們有關(guān)識(shí)別“誰(shuí)有可能是網(wǎng)上竊掠者,如何來(lái)避免”)”推斷D選項(xiàng)正確(識(shí)
別和遠(yuǎn)離他們)。
【小題2】A推理判斷題。根據(jù)第四段中“No matter how well you think you know this person, there are
no guarantees that they have told the truth.(不論你在網(wǎng)上對(duì)這個(gè)人了解的如何好,也不能保證他<們>
告述你的就是實(shí)話)”和“but just remember that not everyone is who they say they are. (但是切記不是
人人都會(huì)說(shuō)出他們的真實(shí)身份的)”可以推斷A項(xiàng)正確(網(wǎng)上遇到的人不是人人都是老實(shí)和可以依靠
的)。
【小題3】D詞義猜測(cè)題。根據(jù)上文的“criminals(犯罪)”和下文的“to request to pay for ‘expensive Internet
charges’or ‘unreasonable Internet cafe fees’(要求你付昂貴的上網(wǎng)費(fèi)用或不合理的網(wǎng)吧收費(fèi))”可以知道
這是“非法的賺錢(qián)伎倆”,故D項(xiàng)正確。
【小題4】B主旨大意題。文章第一段就是本文主題句所在段:解決網(wǎng)上安全問(wèn)題正確的辦法是教育青少年如何安全使用網(wǎng)絡(luò),教育他們有關(guān)識(shí)別“誰(shuí)有可能是網(wǎng)上竊掠者,如何來(lái)避免他們的竊掠”。
考點(diǎn):科普類(lèi)閱讀理解

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解



At the moment, there are two reliable ways to make electricity from sunlight. You can use a panel of solar cells to create the current directly, by liberating electrons from a semiconducting material such as silicon. Or you can concentrate the sun’s rays using mirrors, boil water with them, and employ the steam to drive a generator.
Both work. But both are expensive. Gang Chen of the Massachusetts Institute of Technology and Zhifeng Ren of Boston College therefore propose an alternative. They suggest that a phenomenon called the thermoelectric(熱電)effect might be used instead—and they have built a prototype(原型)to show that the idea is practical.
Thermoelectric devices are not new. They are used, for example, to capture waste heat from car engines. They work because certain materials generate an electrical potential difference within themselves if one part is hotter than another. That can be used to drive a current through an external circuit.
The reason thermoelectric materials have not, in the past, been applied successfully to the question of solar power is that to get a worthwhile current you have to have a significant temperature difference. (200℃ is considered a good starting point.) In a car engine, that is easy. For sunlight, however, it means concentrating the heat in some way. And if you are going to the trouble of building mirrors to do that, you might as well go down the steam-generation route, which is a much more efficient way of producing electricity. If the heat concentration could be done without all the equipment of mirrors, though, thermoelectricity’s inefficiency would be balanced by the cheapness of the equipment.
In their view, three things are needed to create a workable solar-thermoelectric device. The first is to make sure that most of the sunlight which falls on it is absorbed, rather than being reflected. The second is to choose a thermoelectric material which conducts heat badly but electricity well. The third is to be certain that the temperature gradient(梯度)which that badly conducting material creates is not wasted by poor design.
【小題1】The following methods can be adopted to make electricity from sunlight EXCEPT         .

A.putting a panel of solar cells into use
B.concentrating sun’s rays with mirrors
C.creating a solar-thermoelectric device
D.building a practical solar prototype
【小題2】Why was the application of thermoelectric materials a failure in the past?
A.Because it’s hard for them to build enough mirrors to make it work.
B.Because 200℃ was hard to reach at that time even in a car engine.
C.Because of the failure of having a significant temperature difference.
D.Because it was hard to focus the sun’s rays with equipment of mirrors.
【小題3】Which of the following is the best title for this passage?
A.Thermoelectric Device --- the Best Method of All
B.A New Method of Making Electricity from Sunlight
C.How to Create a Workable Thermoelectric Device
D.Solar Power --- a New Energy Trend in the Future

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

Global warming is causing more than 300,000 deaths and about $125 billion in economic losses each year, according to a report by the Global Humanitarian Forum, an organization led by Kofi Annan, the former United Nations secretary general.
The report, to be released Friday, analyzed data and existing studies of health, disaster, population and economic trends. It found that human-influenced climate change was raising the global death rates from illnesses including malnutrition and heat-related health problems.
But even before its release, the report drew criticism from some experts on climate and risk, who questioned its methods and conclusions. Along with the deaths, the report said that the lives of 325 million people, primarily in poor countries,were being seriously affected by climate change. It projected that the number would double by 2030.
Roger Pielke Jr., a politicalscientist at the University of Colorado, Boulder, who studies disaster trends, said the Forum’s report was “a methodological embarrassment” because there was no way to distinguish deaths or economic losses related to human-driven global warming amid(在...中間) the much larger losses resulting from the growth in populations and economic development in vulnerable(易受傷害的) regions. Dr. Pielke said that “climate change is an important problem requiring our utmost attention.” But the report, he said, “will harm the cause for action on both climate change and disasters because it is so deeply flawed(有瑕疵的).”
However, Soren Andreasen, a social scientist at Dalberg Global Development Partners who supervised the writing of the report, defended it, saying that it was clear that the numbers were rough estimates. He said the report was aimed at world leaders, who will meet in Copenhagen in December to negotiate a new international climate treaty.
In a press release describing the report, Mr. Annan stressed the need for the negotiations to focus on increasing the flow of money from rich to poor regions to help reduce their vulnerability to climate hazards while still controling the emissions of the heat-trapping gases. More than 90% of the human and economic losses from climate change are occurring in poor countries, according to the report.
【小題1】 What is the finding of the Global Humanitarian Forum?

A.Rates of death from illnesses have risen due to global warming.
B.Global temperatures affect the rate of economic development.
C.Malnutrition has caused serious health problems in poor countries.
D.Economic trends have to do withpopulation and natural disasters.
【小題2】 What do we learn about the Forum’s report from the passage?
A.It caused a big stir in developing countries.
B.It was warmly received by environmentalists.
C.It caused a lot of interest in the scientific circles.
D.It was challenged by some climate and risk experts.
【小題3】 What is Soren Andreasen’s view of the report?
A.Its conclusions are based on carefully collected data.
B.It is vulnerable to criticism if the statistics are closely examined.
C.It will give rise to heated discussions at the Copenhagen conference.
D.Its rough estimates are meant to draw the attention of world leaders.
【小題4】What does Kofi Annan say should be the focus of the Copenhagen conference?
A.How human and economic losses from climate change can be reduced.
B.How rich countries can better help poor regions reduce climate hazards.
C.How emissions of heat-trapping gases can be reduced on a global scale.
D.How rich and poor regionscan share responsibility in curbing global warming.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

“Choo, Choo!” Here comes the Chunnel train. Get aboard if you want to learn more about this underground transportation system. This is an unusual form of transportation, because it is a tunnel that trains travel through and not an actual form of transportation.
The Chunnel is actually the English nickname for the Channel Tunnel. In French, it is called le tunnel sous la Manche. It is a rail tunnel beneath the English Channel at the Straits of Dover. It connects Cheriton in Kent, England with Sangatte in northern France. It is the second longest rail tunnel in the world.
Did you know that the British and the French had a race whi1e they were building the Chunnel? The race was to see who could get to the middle of the tunnel first. The British won by a little bit. It took 15,000 workers over seven years to dig the tunnel. The tunnel was finished in 1994.
The completed Chunnel cost about $ 21 billion. But it all paid off, because it became very popular, very quick. Millions of people use it. Now it is getting even more popular.
There are three complete tunnels in the Chunnel. The two outside ones are the passenger trains. The small inner one is a guidance train. The guidance train is not used for transportation. Each track is exactly parallel to each other.
There are four different train systems in the Chunnel. The Eurostar is a high speed passenger service that connects London, Paris, Brussels, and Lille. The Eurotunnel shuttle is a rail ferry service. These shuttles carry cars. These are railcars that allow drivers to drive their vehicles on and off. There are also two Eurotunnel goods service trains.
Now you know more about the Chunnel. Everybody off, this is the last stop.
【小題1】The Channel Tunnel links ______ with _______.

A.Dover; KentB.London; ParisC.Lille; BrusselsD.Cheriton; Sangatte
【小題2】Which of the following shows the structure of the tunnels in the Chunnel?

【小題3】The Eurotunnel shuttle is intended to carry _________.
A.passengersB.drivers and their vehicles
C.goods D.staff members of the Chunnel
【小題4】The text can most probably be __________.
A.found in a textbook B.read in a magazine
C.broadcast on a train D.heard in a railway station

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

Is your family interested in buying a dog? A dog can be a pleasant companion(伙伴) to your family, but if you choose the wrong kind of dog,you will have a lot of troubles.
Families should sit down and thoroughly discuss the possible problems before buying a dog. Even if the children in your family are the ones who want the dog, the parents are the ones who are really responsible for seeing that the animal is properly cared for. If you don’t know much about dogs, it is a good idea to go to the library for books about different kinds of dogs, as well as books about how to train a young dog. In reading about the different breeds(種類(lèi))you should know that a dog described(描述)as very alert(機(jī)敏靈活的)may be too active. When a book describes a dog as an excellent hunting dog, it probably means that the dog won’t be happy living in a small house. Dog breeds vary(變化)in popularity as the years go by. One of the most popular dogs these days is the German shepherd(牧羊犬). This is because it provides protection as well as companionship(陪伴). The family should be warned that these dogs grow up to be very big, and may be too powerful for children to control. If space is limited, a toy dog may be a good choice. These dogs are very small and easy to train. They don’t need to be walked daily, since they can exercise in the home.
【小題1】According to the passage, one can get information about different kinds of dogs      .

A.by going to the library
B.by asking someone who has enough experience about different kinds of dogs
C.by buying a dog and training it
D.by reading books about dogs
【小題2】The German shepherd is a popular dog      .
A.because it is easy to train
B.because it is big and strong
C.because it is powerful and friendly
D.because it is alert and active
【小題3】Which is the best topic of the passage?
A.The care and proper selection of dogs for families.
B.Different breeds of dogs.
C.Responsibility for seeing that dogs are properly cared for.
D.Different kinds of books about dogs.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

[1] As adolescents(青少年), having a meaningful effect on the world can seem like an impossible task for the simple fact of being kids.  Changing the world does not only mean finding a cure for cancer, eliminating poverty, or finding the origin of humanity, but recycling a piece of paper as well. Going Green is a practical way that adolescents can have a real, meaningful influence in the world.  There are numerous options of how individuals can change their lifestyles to be more eco-conscious(有生態(tài)環(huán)保意識(shí)的). What follows are three simple ways young adolescents can go green and change the world.
1. Recycle
[2] According to a Wire & Twine online article, 63 million newspapers come out every day and of those 44 million are thrown away; recycling the Sunday newspaper alone we could save half a million trees a week.
[3] The age of technology constantly creates new phones, iPods, or new computers.  Many will stand in line for hours if not days to get their hands on the new piece of technology, but what happens with the old ones once they are replaced?  Nothing, according to Earth911 about 75% of the old devices sit in the back of a drawer collecting dust.  By taking them to the local stores that collect them, they go to poor people which in turn removes them from landfills(垃圾填埋場(chǎng)) where the phones explode because of the lead and lithium-ion(鋰離子) the phones contain.
2. Go vegetarian one day a week
[4] Instead of breaking down the pros and cons(利弊) of the vegetarian lifestyle into a long boring paragraph, here are some astonishing facts on going vegetarian for only one day.  According to Noam Mohr, a physicist at the New York University, the United States would save 100 billion gallons of water which is enough to supply all homes in New England for about 4 months.
[5] The United States would save 70 million gallons of gas which is enough to fuel all the cars of Canada and Mexico combined and still have some to spare. The United States could prevent 3 million tons of soil erosion(侵蝕), 4.5 million tons of animal wastes, and about 7 tons of ammonia emissions (氨排放). The Environmental Defense concludes with the most interesting fact: if the entire population gives up one meal of chicken, the amount of carbon dioxide accumulated would be the same amount if more than half a million cars were taken off U.S. roads.
3. 第6題
[6] Most drink bottled water because of the common view that bottled water is healthier than regular tap water; actually, 25% of bottled water comes from regular tap water and all that is done extra is it going through a filter(過(guò)濾器).  Tap water has higher regulations from the FDA (Food and Drug Administration美國(guó)食品藥品管理局) than bottled water does.  Companies do not need to list where they got the water from, how they purify the water, or what chemicals their plastic water bottles contain.  Plastic bottles do not get recycled 90% of the time which results in 1.5 million tons of plastic in landfills which take thousands of years to rot.  Not only are you drinking the same water as that in your house but also paying extra.  The average 24-pack of bottled water cost $3.97 at the local Wal-Mart and a reusable water bottle cost between $4.99-$7.99; just imagine how much money could be saved if reusable water bottles replaced plastic water bottles.
[7] Changing the world for a positive has to start somewhere and while it may be hard and at times it may seem as if the small changes that are being done are not affecting the world, keep in mind what Margaret Mead once said, “Never doubt that a small group of thoughtful citizens can change the world; indeed, it’s the only thing that ever has.”
【小題1】What’s the whole passage mainly talked about?

A.Ways to protect environment. B.Ways to become powerful.
C.The importance of recycling. D.The importance of saving water.
【小題2】What’s the meaning of the underlined sentence in Paragraph 1?
A.Changing the world involves many questions.
B.It’s not easy to change the world.
C.Changing the world is not so difficult.
D.We can actually do everything.
【小題3】How much of the daily newspapers are thrown away according to Paragraph 2?
A.About 44%. B.About 63%. C.About 70%. D.About 75%.
【小題4】 In the article, the writer _____ to tell us the benefits of the vegetarian lifestyle.
A.does a lot of reasoning B.uses many facts
C.borrows VIPs’ phrases D.puts forward new ideas
【小題5】What’s the benefits of giving up just one day of eating meat according to Paragraph 4 and 5?
A.Much water and gas would be saved. B.Much land would be spared.
C.More animals would survive. D.More cars would be on the roads.
【小題6】Which of the following can be the subtitle(小標(biāo)題) of Paragraph 6?
A.Drink healthy water B.Produce bottled water
C.Give up bottled water D.Reuse tap water
【小題7】Why do many people choose to drink bottled water according to Paragraph 6?
A.They think it’s cheaper.
B.They think it’s healthier.
C.They think it’s more fashionable.
D.They think it’s environmental friendly.
【小題8】What’s the main idea of the last paragraph?
A.We should find a proper time to start action
B.Small changes will make big differences.
C.Personal efforts will not affect the world.
D.A small group of people matters.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

In the near future, we may be using our eyes to operate our smart-phones and tablets, even when it comes to playing popular games like Fruit Ninja.
The Gaze Group has been developing eye-controlled computer technology for nearly 20 years. But those devices have been firstly designed to help those with disabilities, and are very expensive.
“After a while, we figured out that probably the best way is to go for a mass-market way,” says Gaze’s Sune Alstrup Johansen. “where everybody would have this available."
Johansen and some of his colleagues have formed a new company, the Eye Tribe, which is hoping to develop the technology on a mass commercial level.
The technology works with the help of the computing device toward the user’s face. After making sure of the user’s eye movements, the technology is then able to easily find where a person’s eyes are moving, and then allow the eyes to control a cursor(光標(biāo)).
“Our software can then determine the location of the eyes and know where you’re looking on the screen to make sure what you’re looking at, ” reads an explanation on the Eye Tribe site.
There has been a gradual change toward hands-free technology in recent years, particularly in the gaming world. Recently Xbox released the Kinect device, which lets users control their Xbox and play certain games using only their hands, legs and voices. But still, most of these devices have been more of a gimmick than a practical way to use one’s hands to control a mobile device. Johansen said a replaceable filter(濾光器)would be a cheap, convenient way for most consumers.
And even as companies like The Eye Tribe work to create such a product for the average user, making the eye-controlled technology more accessible and less expensive will have similar benefits for physically disabled users.
For more articles on modern science,please CLICK here.
【小題1】Which of the following is the main idea of the passage?

A.An introduction of eye-controlling technology
B.An introduction of a new device.
C.An introduction of smart-phones
D.An introduction of a new technology for the disabled.
【小題2】The underlined word “gimmick” probably means ___________.
A.a(chǎn) way B.a(chǎn) trick C.a(chǎn) lie D.a(chǎn) dream
【小題3】According to the passage, we can learn that ___________.
A.the eye-controlling technology was first developed for the blind
B.the present developing of the technology will bring no good
C.the eye-controlling technology is only intended for the disabled people
D.there is no such a phone as we can use only with our eyes at present
【小題4】This passage is probably taken from ___________.
A.a(chǎn)n experiment report B.a(chǎn) science fiction
C.a(chǎn) science website D.a(chǎn) school textbook

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

For medical students, real experience begins not in a classroom but at a teaching hospital. These doctors in training are guided. But sometimes accidents happen and the students get injured.
For example, they might stick themselves with a needle while treating patients. Such needle sticks are common. But a recent study found that medical students often fail to report them. Failing to report an injury like this can be dangerous if a patient, or a medical worker, has an infectious disease.
Researchers at Johns Hopkins University in Baltimore, Maryland, did the study, which involved a survey answered by almost 700 surgeons in training in the United States.
Almost 60% said they had suffered needle stick injuries when they were in medical school. Many said they were stuck more than once. Yet nearly half of those whose most recent incident happened in school did not report it to a health office. If they had, they would have been tested to see if they needed treatment to prevent an infection like HIV or hepatitis.
Most known cases of HIV or hepatitis are reported, but other possible infections often are not. Martin Makary, the lead author of the study, says medical students who are stuck put themselves and others in danger from infectious diseases.
Doctor Makary said, "A needle that goes through the skin needs to be as sharp as possible.” Doctors in training may have to do hundreds of stitches (縫線) in some cases to close the skin after an operation.
Doctor Makary said, “I support using blunt tip needles which are considered safer. This needle is still sharp enough to go through body tissue, but it does have a blunt tip, so that if it accidentally goes into my finger, it's much less likely to hurt me."
How common are needle sticks among health care workers? An estimated 600,000 to 800,000 of these and similar injuries are reported each year in the United States. But Doctor Makary says the real number may be much higher.
The study advises doctors to protect their hands by wearing two sets of gloves. It also urges hospitals to establish a special telephone number for medical workers and students to call if they are injured. The idea is for hospitals to send a clear message that there is no reason not to report this kind of accident.
【小題1】It is dangerous for medical students not to report needle stick injuries because _________.

A.they don’t know how to treat themselves.
B.they may meet more needle sticks
C.it may cause some diseases
D.it may make patients sad.
【小題2】If they report needle stick injuries, medical students will __________.
A.receive treatment B.be forbidden to use sharp needles
C.spend more time on training D.receive tests
【小題3】The underlined word “blunt” in Paragraph 7 is the closest in meaning to “__________”.
A.not sharp B.not safe C.not long D.not thick
【小題4】What do we know from the passage?
A.Doctors who don’t report needle stick injuries will be punished.
B.Needle sticks among health care workers will reduce sharply in the future.
C.Most needle stick injuries happen in the United States.
D.Two suggestions are given to protect medical workers and students.
【小題5】Where can this passage most probably be found?
A.In an entertainment magazine B.In a science magazine
C.In a storybook D.In science fiction

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解

Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been shown that rats will, when given a choice over a period of time, prefer water with vitamins(維生素) to water without vitamins, even though there is no difference in taste or smell between the two water bottles. When a sweet smell was added to the vitamins-enriched water, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were changed to the clear water. In time(最后), however, they broke the habit and went back to where the necessary vitamins were.
In experiments, babies of 6 to 12 months old were placed in a room with many choices of baby food before them. They were given whatever food they pointed to or appeared interested in. We are told that at first they showed some unusual eating habits, but over a period of time they managed to choose a well-balanced diet.
So in choosing food, rats and babies do seem to know what's best for them. Clearly, there is a kind of “body wisdom”, which humans soon lose. Most of us do not eat as wisely as we could. Many of our food preferences are culturally determined and influenced by old habits. Some people eat foxes, dogs and blackbirds, while we eat cows and pigs. So what people eat and how much they eat seem to be greatly influenced by what is going around them.
【小題1】 In the experiment on rats, a sweet smell was added to the rats’ drinking water to ________ .   

A.encourage rats to drink vitamins-enriched water
B.test whether rats know which drink is good for them
C.find out rats’ preference in flavor(口味)
D.show the vitamins are tasteless
【小題2】Talking about eating habits, babies and rats are just like each other because ________ .
A.both have the wisdom to choose a balanced diet
B.both prefer flavored food and drink
C.both have the same eating habits
D.both develop a taste for the same kinds of food
【小題3】In the experiment mentioned in the second paragraph, babies were ________ .
A.given many choices of drinks
B.placed and fed in a hospital
C.given all kinds of baby food
D.trained to select a balanced diet
【小題4】Grown-up people’s eating habits differ from those of babies because ________ .
A.they know better than babies what kinds of food are good for their health
B.they usually cannot say no to all kinds of delicious foods
C.their eating habits have much to do with the social and cultural customs
D.they have more choices of food than babies in eating patterns

查看答案和解析>>

同步練習(xí)冊(cè)答案