For centuries, the body’s blood has been linked closely with the emotions．People who show no human emotions or feelings, are said to be cold-blooded killer．For example, the police are searching for a cold-blooded killer．He seems to kill for no reason, and no emotion, as if taking someone’s life as nothing．
Cold can affect other parts of the body．The expression “get cold feet” has nothing to do with cold or your feet．The expression means being afraid to do something you have decided to do．For example, you agree to be president of an organization．But then you learn that all the other officers have resigned, and all the work of the organization will be your responsibility．You are likely to get cold feet about being president when you understand the situation.
The expression “give someone the cold shoulder” probably comes from the physical act of turning your back toward someone, instead of speaking to him face to face．You may give a cold shoulder to a friend who has not kept a promise he made to you．Or, to someone who has lied about you to others．
A cold fish is not a fish．It is a person．But it is a person who is unfriendly, unemotional and shows no love or warmth．A cold fish does not offer much of himself to anyone．Someone who is a cold fish could be cold-hearted．Now a cold-hearted person is someone who has no sympathy．Several popular songs in recent years were about cold-hearted men or cold-hearted women who, without feelings, broke the hearts of their lovers．
Out in the cold means not getting something that everybody else got．A person might say that everybody but him got a pay raise---he was left out in the cold．And it is not a pleasant place to be．When you refuse to speak to a man and treat him in a distant way, you may express by “____”．
| A．I give him the cold shoulder |
| B．I think he is a cold-blooded man |
| C．I think he is a cold fish |
| D．I’m likely to get cold feet |
If Sue shows absolutely no reaction to those awful pictures of starving children in Africa, you will say _________．
| A．she is a cold-blooded killer | B．she gets cold feet |
| C．she is a cold fish | D．she is out in the cold |
We can use the expression “__________” to describe a man who abandons or hurts his lover without mercy．
| A．cold-blooded | B．cold shoulder |
| C．cold feet | D．cold-hearted |
The topic of this passage is about _________．
| A．the relationship between cold and our body |
| B．some expressions about friendship |
| C．some expressions connected with cold |
| D．how cold weather comes into being |
| You are here: Experts > Science > Science/Nature for Kids > Science for Kids > Life Science for teens<> |
| Expert: Science Adviser - <>3/21/2011 |
| QUESTION: Dear Marie, Do you have some good suggestions of biology: plant, animal, human science experiments that would work well with teenagers? Scientific methods must go with the experiments. Thanks! < Donna ANSWER: Dear Donna, Marie is not online and I’ll help you instead of him. There are a lot of little things that can be done, but do you mean lab experiment or statistical analysis, etc.? Let us know what can be suitable for you teens, and we will do our best to send you some experiments to do. Best， Gloria |
| Expert: Science Adviser - 3/23/2011 |
| QUESTION: Dear Gloria, I need lab experiments. The teenage students and I will use data from these experiments to make charts, graphs, tables, etc. and to provide claims and evidence to explain more about the results. Thank you very much. Donna ANSWER: Hi there, Your best and easiest way is to do some chemistry experiments. Those are very easy and most probably you can do it in the lab and have charts, etc. for you. I do not have any particular one at the top of my head because I do cancer research and it is a bit more difficult than research for teenagers. I think you can look through these and see if you find something useful for you. http://www.siraze.net/chemistry/sezennur/experiments.htm If not, get back to me and Marie, and we’ll look more. The good thing about this site is that it has the procedures that you can follow. Good luck， Gloria |
How many Science Advisers are there working for this website?
| A．Only one. | B．At least two. | C．About three. | D．Over five. |
According to Donna, she and the teenage students need ___________.
| A．experiments in the lab | B．statistical analysis |
| C．chemistry experiments | D．charts and evidence |
Who is this text for?
| A．Teenagers. | B．Teachers. | C．Parents. | D．Experts. |
According to Gloria, Donna and the teenage students should __________.
| A．turn to others for help | B．do cancer researches |
| C．look through a website | D．tell who will be helped |
According to the dictionary definition of“create, ordinary people are creative every day”.To create means“to bring into being, to cause to exist something each of us does daily”.
We are creative whenever we look at or think about something in a new way. First, this includes an awareness of our surroundings. It means using all of our senses to become aware of our world. This may be as simple as being aware of color and texture(质地),as well as taste, when we plan a meal. Above all, it is the ability to notice things that others might miss.
A second part of creativity is an ability to see relationships among things. If we believe the expression,“There is nothing new under the sun, the creativity is remaking or recombining(重组) the old in new ways.”For example, we might do this by finding a more effective way to study or a better way to arrange our furniture, or we might make a new combination of camera lenses and filters to create an unusual photograph.
A third part of creativity is the courage and drive to make use of our new ideas, to ask for them to achieve some new results. To think up a new idea is one thing; to put the idea to work is another.
These three parts of creativity are included in all the great works of geniuses, but they are also included in many of our day-to-day activities.“There is nothing new under the sun” really implies that _________.
| A．a new thing can only be created at the basis of earliest things |
| B．a new thing is only a tale |
| C．we can seldom create new things |
| D．we can hardly see really new things in the world |
What does the author think about the relationship between a new thought and its being put into practice?
| A．It’s more difficult to create a new thought than to use it in practice. |
| B．To find a new thought will clearly lead to the production of a new thing. |
| C．A man with an excellent ability of practice can easily become an inventor. |
| D．One may come up with a new thought, but can not put it into practice. |
The best title for this passage is__________.
| A．How to Develop One’s Creativity | B．What Is Creativity |
| C．The Importance of Creativity | D．Creativity, a Not Faraway Thing |
All plant cells are capable of taking up（吸收）water. Even dead ones do to a certain degree. Absorption（吸收）of water by dead cell walls makes wood become larger.
In common land plants, the living cells of roots take upmost of the water. Land plants without roots do exist, however. Those greenish-yellow lichens（苔藓）you see on rocks in the high mountains have no roots. Half a billion years ago, when water plants started to enter the land, the first land plants did not have roots.
Even among the flowering plants, one finds rootless forms. These flowering plants are “the higher plants” because they evolved（进化）recently and are thus considered higher on the evolutionary scale（进化度）.
In the Peruvian desert, there grows one of these rootless higher plants, a bromeliad. It is a relative of the pineapple. Even if this plant had roots, they would be of no use, because where the plant grows, it never rains. The plant gets its water only from the dew（露水）it collects at night, when its leaves cool off. Such rootless plants, of course, can be moved with ease, but they will only grow when they are placed out in the open. If they are placed too near a house, the radiation from the heat of the house prevents the leaves from cooling and so prevents dew from forming, and the plant dies.
In the southern United States and in Puerto Rico, one sees bromeliads growing high above the streets on the insulation（绝缘物）of electric wires. These plants get their water from rain, and the only soil they ever come in contact with is the dust that may blow on their leaves.Wood becomes larger because of .
| A．dead cell walls | B．water entering dead cells |
| C．the growth of cells | D．the death of cells |
From the passage we know that the evolutionary scale is graded according to.
| A．evolutionary cycles | B．heights and depths |
| C．time | D．kinds |
The “bromeliad” is a plant that.
| A．has no roots | B．is a pineapple |
| C．can grow anywhere | D．takes up water through its leaves |
The most suitable title for this passage is “”.
| A．Absorption of water by plants | B．Rootless plants in America |
| C．Plants in the desert | D．Higher plants |
Let’s pretend we’re sailing down the Rhine River on a pleasure boat. The Rhine is one of the main waterways of Germany, and the river traffic is heavy. It’s interesting to watch the many boats going up and down the river. But the river traffic is not nearly so interesting as the beautiful scenery along the banks and hillsides. The boat is passing many old castles. We can see people working in the vineyards (葡萄园) on the hillsides. There are vineyards as far as the eye can see. Wine from the Rhine Valley is famous all over the world.
Suddenly our boat slows down and begins to turn a little. We are coming to a sharp bend in the river. On our right we can see a rocky cliff over 400 feet high. At first it looks quite ordinary, but there is nothing ordinary about it. There are many stories, poems, and songs about the cliff. We are looking at the Lorelei. Then someone on the boat begins to sing in German, the song of the Lorelei. It is a song about a beautiful siren (妖妇) who has lured(引诱) many sailors to their deaths.
The siren is supposed to sit on the rock combing her long golden hair and singing. The sailors who hear her forget to steer（掌舵）, and the current of river hurls (掀翻) their boats on the rocks and dashes（猛撞）them to pieces.
Soon other people on the boat begin to sing. The beautiful song adds to special magic to the moment, and you begin to realize why so many people have made this trip down the Rhine to see the rock of the Lorelei.The most interesting thing to those who are sailing down the Rhine River on a pleasure boat is.
| A．to watch many boats going up and down the river |
| B．to see the beautiful scene along the banks and hillsides |
| C．to hear a song about beautiful siren |
| D．to see a beautiful siren combing her golden hair |
Which of the following is famous all over the world?
| A．The Rhine River. | B．The River Traffic. |
| C．Wine from the Rhine Valley. | D．The Lorelei. |
We can see a rocky cliff over 400 feet high.
| A．on our right when coming to a sharp bend | B．on the Rhine hillsides |
| C．from the Rhine Valley | D．on the boat |
The song of the Lorelei is about.
| A．The Rhine wine |
| B．a rocky cliff |
| C．the beautiful scenery along the Rhine River |
| D．a beautiful and dangerous siren |
Gene technology to benefit people
Among all the fast growing science and technology, the research of human genes, or biological engineering as people call it, is drawing more and more attention now. Sometimes it is a hot topic discussed by people.
The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with, such as cancer and heart disease. Every year, millions of people are murdered by these two killers. And to date, doctors have not found an effective way to cure them. But if the gene technology is applied, not only these two diseases can be cured completely, bringing happiness and more living days to the patients, but also the great amount of money people spend on curing their diseases can be saved, therefore it benefits the economy as well. In addition, human life span(寿命) can be prolonged.
Gene technology can help people to give birth to more healthy and clever children. Some families, with the English imperial(皇室) family being a good example, have hereditary(遗传的) diseases. This means their children will for sure have the family disease, which is a great trouble for these families. In the past, doctors could do nothing about hereditary diseases. But gene technology can solve this problem perfectly. The scientist just need to find the wrong gene and correct it and a healthy child will be born.
Some people are worrying that the gene research can be used to manufacture human beings in large quantities. In the past few years, scientists have succeeded in cloning a sheep; therefore these people predict that human babies would soon be cloned. But I believe cloned babies will not come out in large quantities, for most couples in the world can have babies in very normal way. Of course, the governments must take care to control gene technology. What does "these two killers" in the second paragraph refer to?
| A．Gene technology and another treatment of the two diseases. |
| B．The two murderers who killed the cloned baby |
| C．The two diseases of cancer and heart disease |
| D．Hereditary diseases and cancer |
What’s the main idea of the third paragraph?
| A．How gene technology can be applied in the field of treating hereditary diseases. |
| B．Gene technology can be used to clone human babies. |
| C．Gene technology can help people to give birth of a baby. |
| D．Gene technology can help the English imperial family out |
In what way gene technology can help to treat hereditary diseases?
| A．Using gene technology, people with hereditary diseases can have more living days. |
| B．Using gene technology, scientist finds the wrong gene and corrects it. |
| C．Using gene technology, human babies can be cloned. |
| D．Doctors can cure cancer and heart disease with the help of gene technology. |
What is the main purpose of writing this passage?
| A．Expressing the writer’s idea that gene technology will benefit people |
| B．Telling people the advantages of gene technology |
| C．Telling the readers that gene technology will not benefit people |
| D．Explaining that gene technology will also do harm to the humanity |