题目内容
Science Daily—American teens are confident they can invent solutions to some of the world's pressing challenges,such as protecting and restoring the natural environment,but more than half feel unprepared for careers in technology and engineering,the Lemelson-MIT Invention Index has found this year.The Lemelson-MIT Invention Index,which assesses Americans' attitudes toward invention and innovation,also found there is an important need for more project-based learning in high schools.
Nearly three out of four American teens believe technological inventions or innovations can solve some of our pressing environmental issues within the next decade,including global warming,water pollution and fossil fuel depletion(消耗).Nearly two-thirds of teens are confident they could invent some of these solutions.This contrasts with only 38 percent of adults who believe they could invent something to help protect and restore the natural environment.Of those adults,more than half are 18-24 years old.
“Today's teens are inheriting our society's environmental challenges,so their confidence and optimism that the problems are solvable is promising and exciting,” said Josh Schuler,executive director of the Lemelson-MIT Program,a non-profit organization at the Massachusetts Institute of Technology whose mission is to recognize outstanding inventors,encourage sustainable new solutions to real-world problems,and enable and inspire young people to pursue creative lives and careers through invention.“However,we owe our youth the tools they will need to solve these challenges.”
The Lemelson-MIT Invention Index found that more than half of American teens do not believe their high school is preparing them adequately for a career in technology and engineering.“Learning to invent is really no different than learning to swim or play the trombone(长号),” said Schuler,“It takes practice.Students need the opportunity to get their hands dirty and invent.Generally speaking,there’s not enough ‘learning by doing’ taking place in today's high schools,and our survey found that students recognize this.”
1.What attitude does Schuler have towards American teens' confidence in solving some of the world's pressing challenges?
A.Doubtful. B.Positive. C.Neutral. D.Unclear.
2.According to the Lemelson-MIT Invention Index,American teens believe _________.
A.they can solve some of the world’s pressing challenges
B.some of the world’s pressing challenges will be solved by adults
C.high school education can provide them the tools they need to solve
D.they are quite prepared to solve some of the world’s pressing challenges
3.We can infer from what Schuler says that _________.
A.American teens don’t get enough project-based learning
B.American teens are too optimistic to be realistic
C.American high school education destroys students’ creativity
D.American teens should be more concentrated on practice
4.What is the most important in learning to invent,according to Schuler?
A.Playing games. B.Playing musical instruments.
C.Practice. D.Special education.
5.We can conclude from the last paragraph that _________.
A.students must get their hands dirty to learn to invent
B.American students are not satisfied with their high school education
C.American students are not encouraged to invent in high schools
D.learning to invent is not something difficult
BAACD
Traditional surgical procedures require surgeons to make large incisions(伤口) in a patient’s body in order to gain access to the internal organs. It was once common for heart surgeons, who perform highly specialized and complex procedures, to make long incisions in a patient’s chest and then split the breastbone to reach the heart. Patients who undergo surgery are often at the risk of infection, as bacteria can infect the cut in the skin. In addition, there is often a lengthy recovery period.
A surgical technique known as “keyhole surgery” has become more common in recent years. In general, the surgeon will make a couple of small incisions around the area where the operation is going to be performed. Tubes are pushed into the holes, and a tiny camera, which is called an endoscope, is put into the body. The camera is attached to a large monitor screen that is positioned so that the doctor can see it while he performs the operation. In addition to the camera, doctors also push their tiny surgical instruments through the tubes. The awkward part of keyhole surgery is that it is counterintuitive; that is to say, if a surgeon wants to move the tool to the left, he or she must push it to the right.
Other advancements in technology are also being used today in the OR (operation room). A new machine called the “da Vinci Surgical System” has been tested in hospitals in the U.S.. Unlike keyhole surgery, the da Vinci’s robot’s moving parts are designed to imitate the natural hand and wrist movement of a surgeon, thus providing better control and sensitivity. The system is controlled by a surgeon from a console(控制台). Sitting at a console a few feet from the patient, the surgeon can perform an operation by holding and moving highly sensitive pads that enable him or her to control the instruments. The area of the body on which the surgeon is working is enlarged on a screen, which is attached to the console. This gives surgeons a realistic three-dimensional view of the area — similar to what they would see during a traditional surgical procedure.
Although the da Vinci Surgical System is undergoing some trials for some procedures, it has been welcomed as revolutionary by many surgeons. Patients with serious illnesses must still undergo major surgery, but the smaller incisions and less invasive procedures typically mean that a shorter recovery time is needed. In some cases, the patient’s stay in the hospital has been cut in half when the da Vinci Surgical System was used. On the downside, some operations have taken up to fifty minutes longer because surgeons are inexperienced at using the new technology. As surgeons become more familiar with the machines, the time needed for surgical procedures is likely to decrease.
1.What can be learned about the traditional surgery according to the passage?
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A.The cost of the traditional surgery is very high. |
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B.It often leaves a large wound in a person’s body. |
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C.Long incisions are made in a patient’s chest. |
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D.The incision is often infected after the operation. |
2. Which of the following is one DISADVANTAGE of keyhole surgery?
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A.It requires the use of long, thin tools and a tiny camera. |
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B.The doctor can not view the inside of the patient’s body clearly. |
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C.The direction in which a doctor moves the surgical tools is reversed. |
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D.An endoscope has to be inserted into the patient’s body in advance. |
3. The da Vinci Surgical System differs from keyhole surgery in that _______.
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A.requires that a surgeon make more small incisions on a patient |
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B.reduces the amount of time it takes to perform a surgical procedure |
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C.allows the surgeon to use the surgical instruments more sensitively |
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D.eliminates the need for surgeons to make large incisions on patients |
4. The passage mainly tells the reader ________.
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A.the challenges brought about by new technology |
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B.the benefits and drawbacks of the da Vinci Surgical System |
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C.the reflections on the development in medical science |
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D.the application of new technologies in modern surgery |