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.

1.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.

2.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.

3.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.

4.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.

第二节:下面文章中有5个段落需要添加首句(第1~5题)。请从以下选项(A、B、C、D、E和F)中选出适合各段落的首句,并在答题纸上将相应选项的标号涂黑。选项中有一项是多余选项。

A. Become reliable.

B. Make some money.

C. Know about your mind.

D. Be good with discomfort.

E. Be ready for opportunities.

F. Learn to deal with uncertainty.

A Guide for Young People: What to Do with Your Life

You can’t figure out the future. Even young people who have a plan (be a doctor, lawyer, research scientist, singer) don’t really know what will happen. Life doesn’t go according to plans. So if you can’t figure out the future, what do you do? Don’t focus on the future. Focus on what you can do right now that will be good no matter what the future brings.

1. ______ The best things in life are often hard, and if you shy away from difficulty, you’ll miss out. You’ll live a life of safety. Learning is hard. Building something great is hard. Writing a book is hard. A marriage is hard. Running a marathon is hard. All are amazing. How do you get good at this? Do things now that are uncomfortable and hard, on purpose.

2. ______ Starting a business, for example, is an amazing thing to do. But if you’re afraid of the unknown future, you’ll avoid it. You can’t know how things will turn out, and so if you need to know how things will turn out, you’ll avoid great projects, businesses, opportunities. But if you can be OK with not knowing, you will be open to many more possibilities. If you’re good at what you are not sure of, you could do all kinds of things.

3.______ Most people don’t realize that fear controls them. They don’t notice when they fail to fix their attention, or consider doing things they told themselves they wouldn’t do. It’s hard to change mental habits because you don’t always see what’s going on in your head. Learn about how your mind works, and you’ll be much better at all of this.

4. ______ I don’t think money is that important, but it is necessary in your life. Making money is hard. You have to make someone believe in you enough to hire you or buy your products/service, which means you have to figure out why you’re worthy of someone believing in you. You have to become worthy. And you have to learn to communicate that to people so they’ll want to buy or hire you. Whether you’re selling cookies door-to-door or trying to get a job as a cashier, you have to do this.

5.______ If you do all of the above, or at least most of it, you’ll be amazing. You’ll be way, way ahead of pretty much every other person your age. And good fortune will come your way, if you have your eyes open: job opportunities, a chance to build something with someone, an idea for a start up that you can build yourself, a new thing to learn and turn into a business. Take risks — that’s one of the advantages of being young. And if none come along, create your own.

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