In today’s congratulatory phone call to the team behind NASA's Mars Curiosity rover（火星车）, President Barack Obama made sure that if the mission discovers Martians, he'll be one of the first to know.
"If in fact you do make contact with Martians, please let me know right away," Obama said during the call, "I've got a lot of things on my plate, but I expect that that will go to the top of the list. Even if they're just microbes(微生物), it will be pretty exciting."
Obama also said he was impressed by the attention that's been paid to flight director Bobak Ferdowsi, the "Mohawk Guy" whose star-spangled haircut and warmhearted behavior during Curiosity's Aug. 5 landing won him Internet fame.
"I, in the past, thought about getting a Mohawk myself," Obama joked. "But my team keeps on discouraging me. And now that he's received marriage proposals and thousands of new Twitter followers, I think I'm going to go back to my team and see if it makes sense."
The congratulatory phone call is a tradition for the White House. But it was clear that Obama particularly enjoyed congratulating the scientists and engineers behind the amazingly successful landing of NASA's newest Mars exploration.
He also said the achievement reflected the American spirit, and he gave his personal promise to protect these critical investments in science and technology.
"This is the kind of thing that inspires kids across the country," he said. "They’re telling their moms and dads they want to be part of a Mars mission, maybe even the first person to walk on Mars. And that kind of inspiration is the byproduct of work of the sort that you guys have done."
The Curiosity rover's $2.5 billion mission focuses on studying billions of years' worth of geology on Mars and determining whether the planet was ever potentially suitable for people to live in. The mission is not specifically designed to explore life, even on the range of microbes, but it could point the way for future life-exploration experiments.Obama phoned the team behind NASA's Mars Curiosity rover in order to _______.
| A．congratulate them on finding Martians |
| B．praise the flight director |
| C．congratulate on the rover’s landing |
| D．encourage them to contact with Martians |
What is the main idea of Paragraph 2 ?
| A．Obama is very busy now. |
| B．Obama longs for the finding of life on Mars. |
| C．Obama is interested in biology. |
| D．Obama wants to contact Martians. |
Which of the following about the Curiosity rover is TRUE ?
| A．It costs billions of dollars. |
| B．It mainly aims to find life on Mars. |
| C．It carries the first person to Mars. |
| D．It proves Mars fit to live on. |
What can we learn from the passage ?
| A．Bobak Ferdowsi got a Mohawk haircut to win great Internet fame. |
| B．Obama called on the government and companies to invest in science. |
| C．America’s president seldom congratulates on scientific achievements. |
| D．Children showed special interest in the landing of Curiosity. |
If your mother wants to tell you something , she uses words . Birds can not talk as we do . But some birds can make sounds to warn their young of danger . They have their own ways to make the young birds do certain thing .
The jackdaw is a kind of blackbirds that lives in Europe . Jackdaws live together in flocks. (群) Yong jackdaws do not know their enemies . When an older jackdaw sees a dog , it makes a loud tattling (格格响的)sound. The young birds know this sound means an enemy is nearby. The sounds warns them to know their enemy .
If a young jackdaw is in a dangerous place, a jackdaw parent flies over him from behind .The parent bird flies low over the young birds back, the parents’ tail feathers move quickly from side to side, It is trying to say , “ Follow me .”
At the same time , the parent calls out , “ Key-aw ,Key-aw .” The parent means , “ Fly home with me .” The young bird then follows the older one home .
Young jackdaws do not have to learn what certain sounds mean. They know the meaning of these sounds from the time they hatch （孵化，小鸡等出壳）.The jackdaw lives in _____ .
| A．Europe | B．Australia |
| C．America | D．Africa |
When an old jackdaw sees a dog , it _____ .
| A．calls out “Follow me .” |
| B．makes a loud sound |
| C．flies away |
| D．fights the dog . |
Parent jackdaw can use their tail feathers to ______ .
| A．ask their young to follow them |
| B．play a game with the young |
| C．tell the meal time |
| D．give a warning of a fire |
Which of the following does this story lead you to believe ?
| A．All animal parents can talk to their young. |
| B．Dogs are the most dangerous enemies for jackdaws. |
| C．Young jackdaws know the meaning of their parents sound when they grow older. |
| D．Some birds can give certain information to one another. |
New research shows that the healthy brain may hold memories which we don’t even remember. In The Journal of Neuroscience, experts report that the brain might hold more memories than people realize, but that restoring those memories can be tricky.
Memory Check
First, participants saw a list of 120 real words mixed with 80 nonsense words. Next, they saw another word list and tried to remember which words had been on the first list. Meanwhile, their brains were scanned with functional magnetic resonance(核磁共振) imaging.
While participants reviewed the second word list, their brain scans showed more activity in a certain brain area -- the posterior（后部的） median temporal lobe(脑叶) -- when they saw words that had been on the first word list.
But participants didn’t always remember that they’d seen those words before. Sometimes, they goofed and said they hadn’t seen those words before. In other words, the posterior median temporal lobe was more sensitive to memory than participants’ consciousness, the researchers note.
“Album”of Memories
Another part of the median temporal lobe also attracted the scientists’ attention. The anterior（前面的）median temporal lobe showed more activity when participants thought they were seeing a new word, the study shows.
So, why did participants sometimes mess up their memory recall? It might be that two parts of their brain -- the posterior and anterior median temporal lobes -- might be dueling(决斗) for the upper hand in deciding what actually happened in the past, the study notes.
In other words, memories might have a photo album in the brain, but sometimes we forget what’s on all of the photo album’s pages.A person sometimes has difficulty recalling because.
| A．he is unconscious when he gets his memories |
| B．he forgets what is on the pages of the photo album |
| C．there are two parts in his brain dueling for the upper advantage |
| D．the anterior median temporal lobe is more active than the posterior |
According to the passage the researchers are.
| A．studying how a person remembers things |
| B．studying a magazine The Journal of Neuroscience |
| C．examining posterior and anterior median temporal lobes |
| D．doing experiments to find out what disturbs a person’s memory |
What did the experts discover when the participants saw the words on the first word list appear on the second word list?
| A．The instrument worked faster. |
| B．The participants were more conscious. |
| C．The posterior median temporal lobe was more active. |
| D．The anterior median temporal lobe was more active. |
The underlined wordgoofedin the fourth paragraph means.
| A．made a mess of | B．made an answer for |
| C．made out of | D．made the best of |
Researchers are now using 3D printing to create models of the human heart to help heart specialists. The heart doctors can use the models to better help patients before an operation.
Dr. Bramlet, a children’s heart expert at the University of Illinois College of Medicine, says the 3-D models show information he cannot get any other way.
“And so what we’ve done with the printed models? We’ve pulled it out of the screen so that you can actually hold it in your hand and evaluate the anatomy（解剖）.”
A 3-D printer uses images from a digital display to create a physical model of a human heart. Matthew Bramlet says doctors can use the model to understand the anatomy.
Pictures from medical tests like CAT scan or MRI are sent to a 3-D printer to create a heart in a plaster（石膏）form. The printer then constructs the heart, thin layer by thin layer. Dr. Bramlet says the model matches the real heart in every detail. “When we’re done with the model and made our decision, we want to be able to go back to the source image and confirm those findings,” he says.
Dr. Bramlet has built model hearts for different kinds of heart operations. All of the operations were successful. In his first case, digital images showed only one tiny hole in a baby’s heart. But, the 3-D printed model showed several defects or problems that the baby was born with. Dr. Bramlet says those defects could not be seen easily in the images. The heart surgeon was able to change the type of surgery for the patient based on the 3-D model. He added that 3-D heart models saves time during heart operations.
Kathy Magliato is a heart surgeon at Saint John’s Health Center in Los Angeles. She welcomes the new technology. She says it could help her make better decisions before she operates on the hearts of her patients.
“I can then take this very complicated structure before the operation and I can hold it in my hand and plan an operation around what I’m seeing, touching and feeling. That to me is what can potentially change the game in an operation and save lives.”
Dr Bramlet continues to research the technology. He is working with the National Institutes of Health to build a 3-D library that includes heart models and images that others can use.Whats the main idea of the passage?
| A．The application of 3-D printing in heart operations |
| B．The development of 3-D technology. |
| C．The difficulties of heart operations. |
| D．Heart operations with the help 3-D models. |
What is the biggest advantage of 3-D models in the diagnose of heart problems?
| A．Surgeons can see, touch and feel the 3-D models. |
| B．They can help surgeons save time. |
| C．They can be made exactly like the hearts. |
| D．They can help discover the otherwise hidden heart problems. |
Which of the following statements is TRUE?
| A．The 3-D model can be taken out of a screen. |
| B．CAT scan and MRI are no longer needed. |
| C．The 3-D model is an exact copy of the heart. |
| D．Digital images are not reliable in heart operations. |
What can we infer from the passage?
| A．Digital images will mislead heart surgeons. |
| B．More patients will benefit from the 3-D technology. |
| C．Heart operations will never fail with 3-D models. |
| D．Surgeons cannot operate on hearts without 3-D models. |
For many people shopping is considered to be one of the favorite activities. For most of them it is just buying some new clothes or presents for close people. But there is another way for whom shopping is much more than just enjoyable activity, it is a real addiction that in many cases leads to a financial disaster, as well as it brings troubles to person’s life and family.
So why can shopping be so addictive? What are the possible signs to be aware of? And how is it possible to stop the need of spending?
“Some of the new evidence suggests that some people, maybe 10%-15%, may have a genetic preference to an addictive behavior, coupled with an environment in which the particular behavior is caused, but no one really knows why.” However, it is much better understood as to why “shopaholics” continue with their unhealthy and destructive behaviors. Individuals get pleasure from their addiction the same way as if they were under drugs.
And when is it really possible to determine whether simple shopping has crossed the border and has already turned into addiction?
Shopaholics go out and buy things much more often than other people do. They often buy things they do not need. Many shopping addicts go on shopping binges(放纵) all year long and may be forced to buy certain items, such as shoes, clothing or kitchen items. Some just will buy anything. Many times they will spend over their budget limits and get into deep financial trouble, spending well above their income. While someone else will think many times if they can afford this or that thing, shop addicts will not recognize the boundaries of a budget.We can learn from the 3rd paragraph that.
| A．shopping addiction is mainly caused by genetic factors |
| B．shopping addicts are also addicted to drugs |
| C．the real cause of shopping addiction is known already |
| D．shopaholics can’t control their unhealthy and destructive behaviors |
The last paragraph is mainly about.
| A．the destructive behaviors of shopaholics |
| B．the early signs of shopping addiction |
| C．the problems of shopaholics |
| D．the binge of shopaholics |
What could be most probably discussed in the paragraph to follow the passage?
| A．How to treat shopping addiction. |
| B．What really causes shopping addiction. |
| C．When shopping addiction takes place. |
| D．What kind of people can become shopping addicts. |
It can be inferred from the passage that.
| A．shopping addiction can’t cause serious problems |
| B．shopping addicts only want enjoyable activities through buying |
| C．it’s not a good idea to let a shopping addict pay by credit cards |
| D．shopping addiction can spread among different people |
I have two sons. They are as different as night and day. My youngest is sweet, loveable, easy-going, and finds joy in everything. My oldest we’ve nicknamed the “Evil Genius” is ambitious, self-confident, and suffers no fools.
Whenever we mentioned Santa my husband and I were rewarded with major eye rolling and deep sighs from my oldest. At first we both tried to ignore it.
We both knew that our eldest had figured out the big secret. But I’d be damned(指责) if he was going to ruin it for his six-year-old brother who had plenty of Santa-loving years ahead of him. I looked at my husband in the eye and said, “I’ll handle this.” to which he responded “Okay just be careful because I’m not sure he knows - he might just be acting like it.” But I knew. And I had it in my mind that he was about to break his younger brothers spirit and break the news to him. I was afraid he was going to take the Christmas spirit away from my sweet innocent youngest and stamp all over it. I had to protect him. I needed to control this now before it got out of control. I rushed into the play room where my oldest was playing alone. I looked him dead in the eyes and said: “Well you know Santa isn’t real, right?” And as I stared at my eight-year-old son for what seemed like a long time of silence, his eyes started to fill with tears. And a tear dropped down his cheek when he screamed out, “He’s not?”
“Um well it’s not that he’s not real (shut up you idiot(白痴) - stop saying he’s not real), but he doesn’t really make and deliver all the toys. Dad and I get some of them for you. So he’s real. He’s just got a little help from us.”
The Evil Genius wasn’t buying it. He just sat there looking at me with an expression of doubt.
You know when you make a terrible mistake but you can’t stop yourself from making it worse? That was me because I just had to know. I had to know why he had seemed to be over Santa. So I asked him why he rolled his eyes and sighed every time his father and I mentioned Santa. To which he replied that kids at school had been saying Santa wasn't real but that he still thought he was.What’s the best title for the passage?
| A．Two different sons |
| B．Santa secret given away |
| C．Protecting one, ruining the other |
| D．Making a mistake worse |
What did the writer conclude when “Evil Genius” rolled his eyes and sighed?
| A．“Evil Genius” had discovered Santa was not real. |
| B．“Evil Genius” had broken the secret to his younger brother. |
| C．Evil Genius” had passed his Santa-loving years. |
| D．Evil Genius” had been influenced by his classmates. |
What does the underlined sentence mean in the passage?
| A．“Evil Genius” refused to buy toys. |
| B．Evil Genius” didn’t believe his mother’s words. |
| C．Evil Genius” wanted to keep silent. |
| D．“Evil Genius” would not give away the secret. |
What lesson can we learn from the story?
| A．Lies can never change facts. |
| B．Honesty is the best policy. |
| C．No one is perfect. |
| D．We should think twice before we act. |