题目内容

【题目】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? Weve 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 ofspan> 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.

【答案】

【1】A

【2】D

【3】C

【4】B

【解析】

试题分析:本文写了3D打印在医疗领域的应用。

【1】A细节理解题。由文章开头Researchers are now using 3D printing to create models of the human heart to help heart specialists.可知本文写的是3维打印在心脏病手术的应用,所以选A。

【2】D细节理解题。由the 3-D models show information he cannot get any other way可知3D打印可以发现别的方式发现不了的问题,故选D。

【3】C细节理解题。由A 3-D printer uses images from a digital display to create a physical model of a human heart.可知3D打印可以制造出心脏的模型,所以选C。

【4】B推理判断题。由Dr Bramlet continues to research the technology可知他记叙研究技术,以后就有更多的病人可以益,所以选B。

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【题目】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, theygoofedand 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.

1A 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

2According 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

3What 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.

4The 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

【题目】 Some recent surveys show that the health conditions of many white collar employees and office workers are rather dangerous. Death cases among white collar employees and office workers are increasing year by year and these cases are generally believed to have been caused by overwork and spending little time taking rest or doing exercise.

If their offices are within the distance of half an hour's walk, some office workers now choose to go to work on foot. Ms. Deng, who works in a foreign enterprise in Beijing, has been walking to her office for more than six months now. I usually have a tight work schedule and can't find time to do exercise. So I choose to walk to work. As she said, if the office is not far from home, most women would like to go to work on foot. Walking is good for their health and can help them to keep good figures as well.

Apart from walking to office,one can also find time to do exercise when one is at work. The simplest way is to desert the lift. Mr. Wei, who works in the Passenger Service Department at Shenzhen Airlines, is one of such men who frequently climb stairs. I only use the lift whenever I'm with my colleagues or my boss. Otherwise, I would climb stairs instead of taking the lift.

In addition, some office workers try to find time to go to a gym at the end of a day. Ms. Sang works in a law firm in Shenzhen. She goes to the gym several times a week when she has the time. I go to the gym every weekend. During the weekdays,I will also go there whenever I have the time. Ms. Sang and her husband both have a gym membership card for a whole year. The cards cost them 3000 yuan. However, they think it's worth it.

【1】Why are death cases among white collar employees and office workers increasing year by year?

A. Because they overwork for a long time.

B. Because they are too busy to have time for a rest.

C. Because they hardly have time to do exercise after work.

D. All of the above

【2】How many ways that office workers use to keep healthy are mentioned in the passage?

A. 3.

B. 4.

C. 5.

D. 6.

【3】If a white collar employee lives one kilometer away from her office , she had better __________ to keep healthy.

A. walk to her office

B. run and then take the stairs to her office

C. take a taxi to her office

D. ride a bike

【4】Which of the following sentences can be added between Paragraph 1 and Paragraph 2?

A. Then, what shall office workers do next to prevent death cases?

B. What will happen to office workers?

C. In order to keep themselves healthy, some office workers now take measures as follows :

D. Walking on foot is the best way for office workers.

【5】The best title of the passage is __________.

A. Health Is Very Important

B. Office Workers Try to Keep Healthy

C. How to Keep Healthy

D. Office Workers' Trouble

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