题目内容

【题目】Time is fair to everyone, and no one has _____ the of possessing one more minute than anyone else.

A.commitmentB.reservationC.securityD.privilege

【答案】D

【解析】

考查名词辨析。句意:时间对每个人都是平等的,没有人有特权会比其他人多一分钟。 A. commitment承诺,保证,奉献,投入;B. reservation 预订,预约,保留;C. security 安全;D. privilege 特殊利益,优惠待遇,特权,荣幸。根据句意,没有人有特权比其他人多一分钟,故选D

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【题目】 Seventeen-year-old Lindsey Stoefen loves to play tennis, softball and run until last October when a rare disorder paralyzed her legs and left her in a wheelchair. But in late April after becoming an in-patient at Marianjoy Rehabilitation Hospital in Chicago, the teen climbed into a specially designed exoskeleton (外骨骼) which supported her body and moved her legs.

“Yes, I'm gonna be a robot! And I was scared at first. Am I gonna like it? Is it gonna be okay? And then once I got into it, I loved it." Lauren Bularzik, Lindsey s physical therapist, says the exo robots help to accelerate the recovery process.

For someone who takes a lot of energy to only walk a few feet, exo can get them up and get them moving. Besides speeding up recovery time, these robotic skeletons are especially helpful for those with paralysis, from spinal cord injuries and strokes.

Using the machine can help some patients rewire their brains to use secondary muscles, so they can eventually walk again without the device. But Patrick Wensing, assistant professor at the University of Notre Dame says exoskeletons have one big drawback. While existing exoskeletons are very powerful, right now they don t understand what the user wants to do. So in order to switch between activities in daily life, you often have to press a button interface to tell the exoskeleton “I would like to stand up now".

Wensing and his team are cooperating with Ekso Bionics, a leading developer of wearable robots, to create a machine that can understand what its user wants to do without implanted sensors and complicated control panels.

Taylor Gambon has spent the last year analyzing data from exoskeleton users and comparing them to models of everyday walking. Later this year, the team will travel to Ekso Bionics' California headquarters, where they will work directly with exoskeletons to design programs that interact with users of various disabilities, so that more people like Lindsey Stoefen can get back on their feet again.

1What's the purpose of the story about Stoefen in the first paragraph?

A.To prove Stoefen's bravery against disability.

B.To explain Stoefen's misfortune in life.

C.To introduce advanced medical skills in Chicago.

D.To introduce the topic of robotic skeleton.

2How does Patrick Wensing find the robotic skeletons?

A.They can improve the recovery speed.

B.They can replace the real person.

C.They can't understand the intention of users.

D.They can help patients do everything in life.

3What's the attitude of Taylor Gambon and his team towards the development of exo robots?

A.Disappointed.B.Critical.

C.Indifferent.D.Optimistic.

4Where is the text probably taken?

A.An advertisement.B.A science fiction.

C.A product handbook.D.A popular science magazine.

【题目】 Natural selection is the process by which one type of animal within a species thrives because of certain characteristics that make it more likely to live than others in its group. The history of the peppered moth(灰蛾)is an example of the natural selection process.

In 19th century England, certain types of peppered moths were able to better blend(融合)into their surroundings. During that time period, great changes were happening in Great Britain. The Industrial Revolution was part of this change, and with it came air pollution. Natural selection often takes hundred or even thousands of years to occur. For the peppered moth, this process occurred comparatively quickly.

At the beginning of the Industrial Age, most peppered moths in England were light-colored and covered with black markings, although a few moths had dark-colored wings. Because the light-colored moths blended into the light-colored bark on the trees, they could not be easily seen by birds that would eat them. As the air grew more polluted, however, tree trunks became covered with soot(烟煤)and became darker. The light-colored moths became easy for birds to see against the dark tree trunks. Since the dark-colored moths now had the advantage, their numbers grew. Within 50 years, the peppered moth went from being mostly light-colored to being mostly dark-colored.

In the 20th century, the air cleared up, and the peppered moth population changed again. As tree trunks lighted due to less soot in the air, light-colored moths once again had an advantage. Their numbers increased as soot levels declined. Depending on their environment, the coloration of the moths helped them to be “naturally selected” to survive.

1In 19th century, what was one of the causes of great changes in Great Britain?

A.The surroundings.B.The Industrial Revolution.

C.The natural selection.D.The peppered moth.

2What can we infer about the peppered moth’s natural selection process?

A.The length of time was unusual.

B.The soot levels in England did not affect it.

C.The color of peppered moths changed at random.

D.It was a good example of environmental protection.

3What’s the difference between light-colored and dark-colored moths?

A.Dark-colored moths were originally easy to see on trees.

B.Both kinds of moths preferred the dark-colored trees.

C.Birds failed to see light-colored moths.

D.The color of moths was unimportant.

4Which would most likely happen if soot darkened England’s trees again?

A.Birds would eat fewer moths.

B.Moths would not be able to stay alive.

C.Light-colored moths would disturb people’s life.

D.The population of dark-colored moths would increase.

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