【原创】Humans are well-equipped for life on Earth. But in space, it is different. Low or zero gravity changes how the blood flows and causes motion sickness, muscle loss and tiredness. Weightlessness can also cause bone loss. But scientists are experimenting with little worms to better understand how space travel affects astronauts.
The millimeter-long worm is called C. elegans. The see-through worm is often used in medical studies because its life is only about two weeks long. Seventy percent of its DNA is the same as human DNA.
Sabanayagam is a scientist, who built a micro-gravity simulator to test how C. elegans would perform in the actual zero gravity of space.
Scientists put the worms into the simiulator full of water. After a week they take out the worms. They look for changes in the worms' epigenome,which are chemical markers that tell the DNA in the cells how to perform. The epigenome can be changed by the environment. And those changes pass from one generation of worms to the next.
"When the worms are in a liquid environment, some epigenomic marks remain even when we take the animal out of the liquid environment and put it back into normal ground conditions. So its offspring keeps this epigenomic memory of the parents' liquid environment or microgravity environment."
The information the scientists have gathered suggests that the epigenomic marks appear during the early part of a worm’s life.
Mr. Sabanayagam says he thinks scientists can find genes in the human similar to those in the worms that responded to microgravity and scientists could possibly observe those genes closely when astronauts travel in space.
Sabanayagam expects C. elegans to visit the International Space Station within two years. He says he hopes information gathered from the worm studies can be used to develop simple, low-cost and quick tests to measure an astronaut's health.What does the underlined word” zero gravity” mean?
| A．Seasickness | B．Muscle loss |
| C．Weightlessness | D．Tiredness. |
From the passage we can know C. elegans _____.
A. has exactly the same DNA as human
B. is harmful to human
C. is often used in agricultural research
D. has a short life periodWhy do scientists experiment with C. elegans?
A. Because it has strong life power in water.
B. Because they want to find how space travel affects astronauts
C. Because the worm will be taken into space.
D. Because they want to find what its DNA like.What is Sabanayagam’s attitude toward the result of the experiment?
| A．Hopeful and satisfied. |
| B．Doubtful and unsure. |
| C．Sad and disappointed. |
| D．Surprised and unbelievable. |
Which section of a newspaper can you find the passage?
| A．Education. | B．Science. |
| C．Advertisement. | D．Entertainment. |
English is a very interesting language. It has borrowed words from many other languages. Immigrants(移民) coming into the United States have contributed many words to the language, which have kept their original pronunciation. “Coolie” and “kowtow” were taken from the Chinese language, “kamikaze from the Japanese, “shampoo” from India, “blitz” from German, “amigo” and “Los Angeles” from Spanish and so on.
Many students have studied English for years, some as many as eight. However, some students still have difficulty in speaking fluent English. Some know many words but are unable to discern them when native speakers use them. In our Oral English classes we will focus on speaking and listening to native English speakers. For this reason, because we are trying to train your ears to hear English and your mouths to speak intelligible (易理解的) English, we will have a rule that ONLY ENGLISH will be spoken in our English classes. Anyone speaking Chinese in class will be required to pay a fine(罚款) in order to encourage the speaking and understanding of English. If teachers enter a classroom and discover that anyone is speaking Chinese, they will require everyone in the room to pay the fine. It is everyone’s job to enforce the English-Only rule. It is for your benefit. It is because we want to accustom (使习惯于) your ears to hearing English.
Other subjects may be learned only from books but the only way to learn a foreign language is to SPEAK IT! Students are often nervous about speaking in class at first but we hope to make the classes fun, so you will forget your nervousness and learn to speak out. Enjoy your classes.The first paragraph is mainly about________.
| A．the difficulty of learning English. |
| B．different words in different languages |
| C．how interesting and various English is |
| D．the immigrants’ contributions to America |
The underlined word “discern” in Para 2 can be replaced by___________.
| A．notice | B．understand |
| C．hear | D．speak |
In the author’s opinion, the only way to learn a language well is to__________.
| A．listen to it on the radio |
| B．learn it from books |
| C．play games with it |
| D．speak it often |
The article is probably aimed at________.
| A．Japanese students | B．German students |
| C．Chinese students | D．Indian students |
Mr. Brown worked in a factory of a small town. He had been there for twenty years before one day he was sent to the capital for important business. He was quite excited because he had never been there before. Before he set off, he asked his wife and three daughters if they wanted him to buy something for them in London. Mrs. Brown began to think it over and then she said she wished her husband would be able to buy a nice umbrella for her, and so did their three daughters. As he was afraid he would forget it, he drew an umbrella on his hand. To his regret, he lost it at the station.
On the train Mr. Brown sat opposite to an old woman. The woman’s umbrella was so nice that he carefully looked at it and said to himself not to forget to buy a few umbrellas like it. When the train arrived at the station in London, he said good-bye to the old woman, took his bag and her umbrella and was going to get off.
“Wait a minute, sir,” shouted the old woman. “That’s my umbrella!”
Then Mr. Brown noticed that he had taken her umbrella. His face turned red at once and said in a hurry,“Oh, I’m very sorry, Madam! I didn’t mean it!”
Seven days later Mr. Brown left the capital. To his surprise, he met the old woman and sat opposite to her again. Looking at the four umbrellas, the old woman was satisfied with herself. “It seems that I had a better result than the other four women.” She thought.We can learn from the passage that Mr. Brown was ______.
| A．a conductor | B．a worker |
| C．a thief | D．an umbrella maker |
Why did Mr. Brown take the woman’s umbrella?
| A．Because he was lost in thought. |
| B．Because it was much like his own umbrella. |
| C．Because he thought the woman would not notice it. |
| D．Because the woman misplaced it beside Mr. Brown. |
When looking at Mr. Brown with four umbrellas, the woman thought ______.
| A．Mr. Brown was an umbrella maker |
| B．Mr. Brown was selling his umbrellas |
| C．Mr. Brown had bought four umbrellas for his family. |
| D．Mr. Brown had stolen the other women’s umbrellas |
How did Mr. Brown get the four umbrellas?
| A．He bought them in London. |
| B．He picked them on the train. |
| C．He brought them from his small town. |
| D．He stole them from four women. |
A popular saying goes, “Sticks and stones may break my bones, but words will never hurt me.” However, that’s not really true. Words have the power to build us up or tear us down. It doesn’t matter if the words come from someone else or ourselves — the positive and negative effects are just as lasting.
We all talk to ourselves sometimes. We’re usually too embarrassed to admit it, though. In fact, we really shouldn’t be because more and more experts believe talking to ourselves out loud is a healthy habit.
This “self-talk” helps us motivate ourselves, remember things, solve problems, and calm ourselves down. Be aware, though, that as much as 77% of self-talk tends to be negative. So in order to stay positive, we should only speak words of encouragement to ourselves. We should also be quick to give ourselves a pat on the back. The next time you finish a project, do well in a test, or finally clean your room, join me in saying “Good job!”
Often, words come out of our mouths without us thinking about the effect they will have. But we should be aware that our words cause certain responses in others. For example, when returning an item to a store, we might use warm, friendly language during the exchange. And the clerk will probably respond in a similar manner. Or harsh (刻薄的) and critical language will most likely cause the clerk to be defensive.
Words possess power because of their lasting effects. Many of us regret something we once said. And we remember unkind words said to us! Before speaking, we should always ask ourselves: Is it true? Is it loving? Is it needed? If what we want to say doesn’t pass this test, then it’s better left unsaid.
Words possess power: both positive and negative. Those around us receive encouragement when we speak positively. We can offer hope, build self-esteem (自尊) and motivate others to do their best. Negative words destroy all those things. Will we use our words to hurt or to heal? The choice is ours.There is no need for us to feel embarrassed when we talk to ourselves because _________.
| A．almost everybody has the habit of talking to themselves |
| B．talking to ourselves always gives us courage |
| C．we can benefit from talking to ourselves |
| D．it does no harm to have “self-talk” when we are alone |
The underlined part in the third paragraph means that we should also timely ________.
| A．remind ourselves |
| B．praise ourselves |
| C．make ourselves relaxed |
| D．give ourselves amusement |
The author would probably hold the view that _________.
| A．encouraging words are sure to lead to kind offers |
| B．negative words may motivate us to make more progress |
| C．people tend to remember friendly words |
| D．it is better to think twice before talking to others |
In which column of the newspaper can you most likely read this passage?
| A．News. | B．Advice column. |
| C．Health. | D．Language. |
Why do parents have such a difficult time to communicate openly and honestly with their teens? For this, there are many reasons but most of them stem from not being able to properly understand their teens. It is a dangerous gap because parents will have to communicate with their teens about a wide variety of issues during the most important years of their lives. Thus, parents must know how to communicate openly and honestly with their teens.
Here are a few tips to make communication easier between parents and teenagers.
1. Try not to talk down to your teens. Make them feel as if their views really matter, which not only helps your discussions with your teen but bring you closer to him.
2. Imagine what it would be like to be a teen. Try to remember some of the negative feelings you experienced as a teenager and apply it to your teen's situation.
3. Never make negative remarks to your teen about what she has said or done.
4. Remember how much courage it would have taken for your teen to come and talk to you about his personal issues. So listen respectfully.
5. Don't ignore your teen's feelings because it is usually a cry for help. For instance, if your teen is unusually angry, it may be time to spend a bit of quality time with your teen to determine what is wrong and where he is coming from.
It is, therefore, necessary for parents to strive to keep lines of communication open at all times with their teens. Try to remember what it was like to be a teenager and how vulnerable（脆弱的）you felt. Then you will be well on your way to help your teen communicate more openly and honestly.Why don't teens want to talk about their personal issues with their parents?
| A．Because they can't respect their parents. |
| B．Because they can't understand their parents. |
| C．Because their parents won't understand them well. |
| D．Because their parents are not honest. |
When your son comes to you for help, you should NOT _____.
| A．listen respectively | B．treat him seriously |
| C．care about his feeling | D．make negative remarks |
Which of the following has the similar meaning to the underlined phrase “talk down to”?
| A．put down | B．look down upon |
| C．chat with | D．quarrel with |
The best title for this passage is _____.
| A．Causes of generation gap |
| B．Relations between teens and parents |
| C．Suggestions for parents-children effective communication |
| D．Problems with communication between teens and parents |
Argentina in the late nineteenth century was an exciting place. Around 1870,it was experiencing an economic boom(繁荣), and the capital, Buenos Aires, attracted many people. Farmers, as well as a flood of foreigners from Spain and Italy, came to Buenos Aires seeking jobs. These jobs didn′t pay well, and the people felt lonely and disappointed with their new life in the city. As the unhappy newcomers mixed together in the poor parts of the city, the dance known as the tango(探戈舞)came into being.
At the beginning the tango was a dance of the lower classes. It was danced in the bars and streets. At that time there were many fewer women than men, so if a man didn′t want to be left out, his only choice was to dance with another man so that he could attract the attention of the few available women. Gradually, the dance spread into the upper classes of Argentinean society and became more respectable.
In Europe at this time, strong interest in dance from around the world was beginning. This interest in international dance was especially evident in Paris. Every kind of dance from ballet(芭蕾舞)to belly dancing could be found on the stages of the Paris theaters. After tango dances from Argentina arrived in Europe, they began to draw the interest of the public as they performed their exiting dance in cafes. Though not everyone approved of the new dance, saying it was a little too shocking, the dance did find enough supporters to make it popular.
The popularity（流行）of the tango continued to grow in many other parts of the world. Soldiers who returned to the United States from World War I brought the tango to North America. It reached Japan in 1926, and in 2003 the Argentinean embassy in Seoul hired a local tango dancer to act as a kind of dance ambassador, and promoted tango dancing throughout South Korea.The origin of the tango is associated with _____________.
| A．Belly dancers | B．American soldiers |
| C．Spanish city | D．the capital of Argentina |
Which of the following is true about the tango?
| A．It was created by foreigners from Spain and Italy. |
| B．People of the upper classes loved the tango most |
| C．It was often danced by two males in the beginning |
| D．A dancer in Seoul became the Argentinean ambassador. |
Before World War I, the tango spread to __________.
| A．America | B．Japan | C．France | D．South Korea |
What can be the best title for the text?
| A．How to Dance the Tango |
| B．The History of the Tango |
| C．How to Promote the Tango |
| D．The Modern Tango Boom |