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. |
People all need friends because nobody wants to be lonely and a friend can help you in good and bad times. You’ve made friends since childhood，but you still don’t know who your true friends are. Here are some signs to tell you if your friend is a true friend.
Always honest
Honesty is important to keep a relationship alive. A true friend always tells you the truth. It may be hard sometimes but lying can destroy a friendship. It is important that your friend speaks honestly and never makes up stories.
There are always periods in your life when you have problems or difficulties. A true friend will always have time to listen to your problems and give you advice. It may not be able to offer a solution to your problems but the fact that your friend makes time to listen is a sign he/she cares for you. Your friend is not a true friend if he/she can never make time for you when you are in trouble. You also need to be reasonable and accept that your friend also has other things to do so he/she can’t always listen immediately to your problems.
Always respectful
A true friend will always respect your opinion no matter whether he/she agrees or not. Your true friend may disagree but never insists that he/she is correct.
Always understanding
It is possible that some problems will arise between you and your friend. A true friend will always be forgiving and understanding，even if it isn’t his/her fault. We are all different people and we all make mistakes. A true friend is always forgiving and understanding because he/she doesn’t want to take the risk of losing his/her best friend.What’s the best title for the third paragraph?
| A．Keep your secrets | B．Always there for you |
| C．Always happy for you | D．Remember your important days |
According to the passage，a true friend will always ____________.
| A．follow your advice |
| B．offer a solution to your problems |
| C．respect your opinion even if he/she disagrees with it |
| D．listen immediately to your problems |
Which of the following is NOT mentioned in the passage?
| A．Never tell lies to friends. |
| B．Making time for friends. |
| C．Paying attention to a friend’s opinion. |
| D．Sharing fun with friends. |
What’s the author’s purpose of writing this passage?
| A．To tell us how to find out if a friend is a true friend. |
| B．To find out how long a friendship can last. |
| C．To introduce his experience in making friends. |
| D．To teach us how to make true friends. |
Recently I have discovered it’s often easier for me to do something every day than to do it just some days. I post to my blog six days a week. I take notes every day. I write in my one-sentence journal every day. Many people have told me that they find it easier to exercise when they exercise every day. If I try to do something just four days a week, I spend a lot of time arguing with myself: Is today the day, or is it tomorrow, or the next day? Does the week start on Sunday or Monday?
If you do something every day, you tend to fall into a routine. Routine has a bad reputation for lacking excitement. It’s true that novelty and challenge bring happiness and that people who break their routines, try new things, and go to new places are happier, but I think that some routine activities also bring happiness. The pleasure of doing the same thing, in the same way, every day, shouldn’t be overlooked. By repeating, you can find happiness in activities like doing dishes or sweeping the floor as well as in your beloved morning coffee-and-news routines.
Two geniuses whom I know of also wrote about the power of doing something every day. Andy Warhol wrote, “Either once only, or every day. If you do something once it’s exciting, and if you do it every day it’s exciting. But if you do it, say, twice or just almost every day, it’s not good any more.” Gertrude Stein made a similar point, “Anything one does every day is important and anywhere one lives is interesting and beautiful.”
So if there’s something that you wish you did more regularly, try doing it every day; if you do something every day, take great pleasure in it.In the first paragraph, what does the author try to tell us?
| A．It’s easier to do the same thing every day. |
| B．It’s important to do the same thing every day. |
| C．He has a good habit of following routines. |
| D．He enjoys the habit of following routines. |
People usually tend to break their routines because they________.
| A．hope to have a better reputation |
| B．would like to get rid of the old habit |
| C．want to have fun and excitement |
| D．are willing to face new challenges |
Which of the following statements does Andy Warhol probably agree to?
| A．Doing something that is exciting. |
| B．Doing something almost every day. |
| C．Doing something every day, not only once. |
| D．Doing something every day or only once. |
Which can be the best title of the passage?
| A．A Way To Form A Habit | B．Do Anything Every Day |
| C．Repeat Regularly | D．Power Of Everyday Repetition |
Once when I was facing a decision that involved high risk, I went to a friend. He looked at me for a moment, and then wrote a sentence containing the best advice I’ve ever had: Be bold and brave — and mighty (强大的) forces will come to your aid.
Those words made me see clearly that when I had fallen short in the past, it was seldom because I had tried and failed. It was usually because I had let fear of failure stop me from trying at all. On the other hand, whenever I had plunged into deep water, forced by courage or circumstance, I had always been able to swim until I got my feet on the ground again.
Boldness means a decision to bite off more than you are sure you can eat. And there is nothing mysterious about the mighty forces. They are potential powers we possess: energy, skill, sound judgment, creative ideas — even physical strength greater than most of us realize.
Admittedly, those mighty forces are spiritual ones. But they are more important than physical ones. A college classmate of mine, Tim, was an excellent football player, even though he weighed much less than the average player. “In one game I suddenly found myself confronting a huge player, who had nothing but me between him and our goal line,” said Tim. “I was so frightened that I closed my eyes and desperately threw myself at that guy like a bullet (子弹) — and stopped him cold.”
Boldness — a willingness to extend yourself to the extreme—is not one that can be acquired overnight. But it can be taught to children and developed in adults. Confidence builds up. Surely, there will be setbacks (挫折) and disappointments in life; boldness in itself is no guarantee of success. But the person who tries to do something and fails is a lot better off than the person who tries to do nothing and succeeds.
So, always try to live a little bit beyond your abilities — and you’ll find your abilities are greater than you ever dreamed.Why was the author sometimes unable to reach his goal in the past?
| A．He faced huge risks. |
| B．He lacked mighty forces. |
| C．Fear prevented him from trying. |
| D．Failure blocked his way to success. |
What is the implied meaning of the underlined part?
| A．Swallow more than you can digest. |
| B．Act slightly above your abilities. |
| C．Develop more mysterious powers. |
| D．Learn to make creative decisions. |
What was especially important for Tim’s successful defense in the football game?
| A．His physical strength. |
| B．His basic skill. |
| C．His real fear. |
| D．His spiritual force. |
What is the author’s purpose in writing this passage?
| A．To encourage people to be courageous. |
| B．To advise people to build up physical power. |
| C．To tell people the ways to guarantee success. |
| D．To recommend people to develop more abilities. |
Getting away for a short time always seems like a great idea—until you have to pack. The rule is: pack light. Here are some tips to help you pack.
Organize Yourself
Make a list. Think of what you need from your head to your toes. When you’ve done this once, it’ll be easier next time.
Start Small
Consider buying small-size samples of shampoo, toothpaste, and other items at your local store. Make sure they are all sealed tightly.
In an emergency, you can purchase them at your destination. But remember that the time you spend buying things at your destination will reduce your visiting time.
The Clothing Dilemma
Choosing which clothes to bring is probably the hardest packing decision to make. Think once again from head to toe — hat, shirts, jeans, sneakers, etc. Once you’ve picked out what you want to bring, think carefully. Do you really need that extra pair of jeans? If so, fine. Don’t try to fool yourself. You are the one who will be left holding the bag.
Weather is an important factor in your packing. If it’s cold, you could wear a jacket, a sweater, a regular shirt, and a T-shirt. Layering up will keep you warm and it will leave more room in your bag. Roll up your casual clothes instead of folding and laying them flat. This leaves more room to pack other things, and keeps your clothes fairly wrinkle-free.
Remember how much easier it will be to carry your bag!This text would be most helpful to a reader who is _______ .
| A．going on a vacation | B．shopping for luggage |
| C．moving to a new home | D．hosting relatives for a visit |
If you buy things at your local store ahead of time, you can _______ .
| A．lighten your load |
| B．save a lot of money |
| C．have more visiting time |
| D．have more room in your bag |
What should one plan to do if going somewhere in the winter?
| A．Pack an extra sweater for the trip. |
| B．Put on several layers of clothing. |
| C．Mix and match clothing outfits. |
| D．Roll jackets so they fit in the bag. |
John sent his mother expensive presents on his mother's birthday every year. He liked to show her how rich he was. "I must find something wonderful for her, and it must be the only one in the whole world. Then my mother must be very happy.” John thought. He advertised (登广告) in the newspapers. “Wanted—the best present for the woman who has everything. "
For many days his telephone did not stop ringing. People phoned him from all over the world. They wanted to sell him "the best present". But they did not have anything that was the only one in the whole world.
Then less than a week before his mother's birthday, a man came to his office. He was carrying a cage, and in the cage there was a large bird.
"This bird, "the man said, "can speak ten languages and sing any pop song. There is no other bird like it in the world. "
"I will listen to it, "John said. “If what you said is true, I will buy the bird from you.”
The man spoke to the bird. "Talk to me in French, " he said. The bird spoke to him in French. "Tell me a joke in Japanese, " he said. The bird told him a joke in Japanese. "Sing a famous pop song, "he said. The bird sang a famous pop song.
"I'll buy it, "John said. "How much do you want?"
"One hundred thousand dollars, "the man said. This was a lot of money but John paid him. Then he sent the bird to his mother with a birthday card.
The day after his mother's birthday he phoned her. "Well, mother, "he said, "Is the bird wonderful?"
"Oh, it was delicious, dear, "she said.Why did John send her mother expensive presents for her birthday every year?
| A．Because he loved his mother very much. |
| B．Because his mother needed these presents. |
| C．Because he wanted to show he had a lot of money. |
| D．Because he was the richest man in the world. |
How did people know John wanted the best present in the world?
| A．They rang John up. |
| B．They knew it from the newspapers. |
| C．John phoned them one by one. |
| D．They knew it on TV. |
Why did John pay the man a lot of money for the bird?
| A．Because it was such a beautiful bird. |
| B．Because he wanted to help the poor man with the bird. |
| C．Because the bird could look after his mother. |
| D．Because he thought the bird could make his mother happy. |
What does the sentence "It was delicious, "really mean in the story?
| A．His mother ate the bird. |
| B．His mother let the bird fly away. |
| C．His mother began to learn languages from the bird. |
| D．His mother thought it was the most expensive present in the world. |
粤公网安备 44130202000953号