Daylight-powered germ-killing equipment（杀菌设备）may someday help protect health workers from deadly virus like Ebola virus. That is a finding from a study published in the journal Science Advances.
Study organizers say they’ve developed membranes（薄膜）that produce very small amounts of hydrogen peroxide（过氧化氢）when left in daylight. Membranes are thin plastic, structures that can serve as barriers. They let some things pass through, but other things art blocked. Hydrogen peroxide, a liquid sold in drug stores, works as a disinfectant（杀菌剂）.
Nearly 500 health workers were infected and died in 2014 when Ebola spread through parts of West Africa. Caregivers wear full-body protective suits when they come into contact with patients with infectious diseases. But the process of removing the suits is a time when infection can spread if the surface is covered with virus. “If there’s any live bacteria or virus on the surface, it’s still transmissible and could cause infection,” said Gang Sun of the University of California. He is one of the researchers that worked to develop membranes that could cover the outside of protective equipment.
When the chemical molecules（分子）on the surface of these membranes are put in sunlight, they react with oxygen in the air to produce small amounts of hydrogen peroxide. Gang Sun explains that the process creates less hydrogen peroxide than what you would use to remove dirt on clothing, for example. But it is still enough to kill organisms.
Rohan Tikekar is a food scientist with the University of Maryland. He described the development as “quite novel,” or new and different, Tikekar was not involved with the recent study. He said others have developed materials that produce disinfecting chemicals. But most only work under high-energy ultraviolet（U V）light, and not usual daylight. The new membrane also works in the dark for at least an hour or two because of chemical properties that can recharge its germ-killing powers. Tikekar called that an important improvement.
Gang Sun said the new membranes, though still Far from perfect could be used for things other than protective equipment for health workers. They could also be added to packaging for fruits and vegetables to keep foods fresher and reduce the risk of being polluted. Some versions of the material use natural chemicals’ Sun says that one of the next steps is to make it safe to sat
1.Which of the following statements is TRUE according to the passage?
A. Daylight helps to turn thin plastic barriers into germ-killing material.
B. Gang Sun developed membranes alone because he was infected with Ebola,
C. Hydrogen peroxide can kill live bacteria as it is a liquid.
D. The membranes react with oxygen when pat in sunlight.
2.What is the attitude of Rohan Tikekar towards the new finding?
A. Cautious. B. Favorable.
C. Doubtful. D. Critical.
3.What is the last paragraph mainly about?
A. The importance of the new membranes.
B. The drawback of the new membranes.
C. More probable uses of the new membranes.
D. More influences of the new membranes.
高二英语阅读理解中等难度题
Daylight-powered germ-killing equipment（杀菌设备）may someday help protect health workers from deadly virus like Ebola virus. That is a finding from a study published in the journal Science Advances.
Study organizers say they’ve developed membranes（薄膜）that produce very small amounts of hydrogen peroxide（过氧化氢）when left in daylight. Membranes are thin plastic, structures that can serve as barriers. They let some things pass through, but other things art blocked. Hydrogen peroxide, a liquid sold in drug stores, works as a disinfectant（杀菌剂）.
Nearly 500 health workers were infected and died in 2014 when Ebola spread through parts of West Africa. Caregivers wear full-body protective suits when they come into contact with patients with infectious diseases. But the process of removing the suits is a time when infection can spread if the surface is covered with virus. “If there’s any live bacteria or virus on the surface, it’s still transmissible and could cause infection,” said Gang Sun of the University of California. He is one of the researchers that worked to develop membranes that could cover the outside of protective equipment.
When the chemical molecules（分子）on the surface of these membranes are put in sunlight, they react with oxygen in the air to produce small amounts of hydrogen peroxide. Gang Sun explains that the process creates less hydrogen peroxide than what you would use to remove dirt on clothing, for example. But it is still enough to kill organisms.
Rohan Tikekar is a food scientist with the University of Maryland. He described the development as “quite novel,” or new and different, Tikekar was not involved with the recent study. He said others have developed materials that produce disinfecting chemicals. But most only work under high-energy ultraviolet（U V）light, and not usual daylight. The new membrane also works in the dark for at least an hour or two because of chemical properties that can recharge its germ-killing powers. Tikekar called that an important improvement.
Gang Sun said the new membranes, though still Far from perfect could be used for things other than protective equipment for health workers. They could also be added to packaging for fruits and vegetables to keep foods fresher and reduce the risk of being polluted. Some versions of the material use natural chemicals’ Sun says that one of the next steps is to make it safe to sat
1.Which of the following statements is TRUE according to the passage?
A. Daylight helps to turn thin plastic barriers into germ-killing material.
B. Gang Sun developed membranes alone because he was infected with Ebola,
C. Hydrogen peroxide can kill live bacteria as it is a liquid.
D. The membranes react with oxygen when pat in sunlight.
2.What is the attitude of Rohan Tikekar towards the new finding?
A. Cautious. B. Favorable.
C. Doubtful. D. Critical.
3.What is the last paragraph mainly about?
A. The importance of the new membranes.
B. The drawback of the new membranes.
C. More probable uses of the new membranes.
D. More influences of the new membranes.
高二英语阅读理解中等难度题查看答案及解析
"If popular culture has taught us anything, it is that someday mankind must face and destroy the growing harm caused by robots." Author Daniel Wilson's description of How to Survive a Robot Uprising seems like it is straight out of a robot disaster movie. "The problem with cleverly-designed robots is that we become dependent on them," says Wilson.
The classic movie Westworld describes an amusement park where, after a safety error, the robots spend a killing period of time. Yet in reality, statistics show that as technology improves there is a trend towards increased safety. Similarly, public transport systems using computers and machines are believed to be more reliable than those in human control, and a robot-assisted operation is more precise and results in fewer medical problems.
But where does the idea of robots being cruel and harmful come from? "Robots were pop culture figures before they existed," says Wilson. "They were frightening creatures in novels. When robots really started existing, they already had this image(形象) set up not based on reality. That's exactly what happened—a movie monster became real."
Recent reports talked of a robot "attack" on a worker in Sweden. Even if these references to an attack rather than an error are meant in joke, this only makes the problem worse. "We're so interested in the robot-attack storyline that it can influence the way real robot-safety problems are discussed," says one journalist. But with robots becoming increasingly advanced, is it going to come a time when an error could become an unkind and cruel attack?
"Robots are just a bunch of metal," says one engineer. "If you are scared, then you are scared of the people building them." So what do engineers think we should be afraid of? Nanotechnology is the science which involves developing and making extremely small but very powerful machines. Some engineers suggest that with these new developments come "severe dangers" if they are used inappropriately. Its theory goes that "the small size and rapid potential of nano-built weaponry（武器）will make it difficult to control and hard to keep out of the hands of terrorists. "And this is a view shared by some artificial intelligence experts. "With robots...if it makes an error, you can unplug it and shut it down. But if you have lots of nano-built weapons, which are extremely small, there is no way you can do the same thing."
1.In the first paragraph, Daniel Wilson ________.
A. confirms the existence of robots
B. introduces the development of robots
C. states that robots are potentially dangerous
D. suggests that we should be dependent on robots
2.People have come to think of robots as something bad because ________.
A. designers of the first robots spread this idea
B. reality shows they are the same as in the movies
C. movie audience continue to give this impression
D. they were originally described this way in novels
3.The author believes that the report of the robot attack in Sweden ________.
A. is intended as a joke
B. serves as a serious warning
C. presents the technical problem
D. expresses sympathy for the worker
4.What are experts afraid of when considering nanotechnology?
A. Robots could use it inappropriately.
B. It could make robots harder to control.
C. It could be more dangerous than robots.
D. There'll be more terrorist attacks because of it.
高二英语阅读理解中等难度题查看答案及解析
Someday a stranger will read your email without your permission or scan the websites you've visited. Or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping preferences or calling habits.
In fact, it's likely some of these things have already happened to you. Who would watch you without your permission? It might be a girlfriend, a marketing company, a boss, a policeman or a criminal. Whoever it is，they will see you in a way you never intended to be seen—the 21st century equal to being caught naked(裸露的)．
Psychologists tell us boundaries are healthy, though it's important to reveal(透露) yourself to friends, family and lovers in stages, at appropriate times. Actually few boundaries remain. The digital bread crumbs (面包屑) you leave everywhere make it easy for strangers to reconstruct who you are，where you are and what you like. In some cases，a simple Google search can reveal what you think. Like it or not， increasingly we live in a world where you simply cannot keep a secret.
The key question is: Does that matter? For many Americans, the answer apparently is “no”．
When opinion polls ask Americans about privacy, most say they are concerned about losing it. A survey found a majority of people are pessimistic about privacy, with 60 percent of respondents saying they feel their privacy is “slipping away, and that bothers me”．
But people say one thing and do another. Only a small part of Americans change any behaviors in an effort to preserve their privacy. Few people turn down a discount at tollbooths(收费亭)to avoid using the EZPass system that can track(跟踪) automobile movements. And few turn down supermarket loyalty cards. Privacy economist Alessandro Acquits has run a series of tests that reveal people will submit personal information like Social Security numbers just to get their hands on a pitiful 50centsoff coupon(优惠券)．
But privacy does matter at least sometimes. It's like health：when you have it，you don't notice it. Only when it's gone do you wish you'd done more to protect it.
1.From Paragraph 2，we can infer________.
A．criminals are easily caught on the spot with advanced technology
B．people tend to be more frank with each other in the information age
C．in the 21st century people try every means to look into others' secrets
D．people's personal information is easily accessed without their knowledge
2.What would psychologists advise on the relationships between friends?
A．There should be a distance even between friends.
B．There should be fewer quarrels between friends.
C．Friends should always be faithful to each other.
D．Friends should open their hearts to each other.
3.According to the passage，privacy is like health in that________.
A．its importance is rarely understood
B．it is something that can easily be lost
C．people will make every effort to keep it
D．people don't treasure it until they lose it
高二英语阅读理解中等难度题查看答案及解析
Someday a stranger will read your e-mail without your permission or scan the website you’ve visited or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping calling habits
In fact, it’s likely that some of these things have already happened to you. Who would watch you without your permission? It might be a spouse, a girlfriend, a marketing company, a boss, a cop or a criminal. Whoever it is, they will see you in a way you never intended to be seen.
Psychologists tell us boundaries are healthy, that it’s important to reveal yourself partly to friends, family and lovers at appropriate times. But few boundaries remain. The digital bread crumbs you leave everywhere make it easy for strangers to know who you are, where you are and what you like. In some cases, a simple Google search can reveal what you think. Like it or not, increasingly we live in a world where you simply cannot keep a secret.
The key question is: Does that matter?
For many Americans, the answer apparently is “no”.
When opinion polls ask Americans about privacy, most say they are concerned about losing it. 60 percent of respondents say they feel their privacy is “slipping away, and that bothers me”.
But people say one thing and do another. Only a small number of Americans change any behavior in an effort to preserve their privacy. Few people turn down a discount at tollbooths to avoid using the EZ-Pass system that can track automobile movements. Privacy economist Acquisti has run a series of tests that reveal people will give up personal information like social security numbers just to get their hands on a 50-cents-off coupon. But privacy does matter－at least sometimes. It’s like health: when you have it, you don’t notice it. Only when it’s gone do you wish you’d done more to protect it.
1.What would psychologists advise on the relationships between friends?
A．Friends should open their hearts to each other.
B．Friends should always be faithful to each other.
C．There should be a distance even between friends.
D．There should be fewer arguments between friends.
2.Why does the author say “we live in a world where you simply cannot keep a secret”?
A．Modern society has finally developed into an open society.
B．People leave traces around when using modern technology.
C．There are always people who are curious about others’ affairs.
D．Many search engines profit by revealing people’s identities.
3.According to the passage, privacy is like health in that _____.
A．people will make every effort to keep it
B．its importance is hardly understood
C．It is something that can easily be lost
D．people don’t value it until they lose it
4.What would be the best title for the passage?
A．Value your health.
B．Treasure your privacy.
C．Boundaries are important between friends.
D．The information age has its own shortcomings.
高二英语阅读理解中等难度题查看答案及解析
Someday a stranger will read your e-mail without your permission or scan the websites you’ve visited. Or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping preferences or calling habits.
In fact, it’s likely some of these things have already happened to you. Who would watch you without your permission? It might be a spouse, a girlfriend, a marketing company, a boss, a cop or a criminal. Whoever it is, they will see you in a way you never intended to be seen—the 21st century equivalent (相等物) of being caught naked.
Psychologists tell us boundaries are healthy, that it’s important to reveal yourself to friends, family and lovers in stages, at appropriate times. But few boundaries remain. The digital bread pieces you leave everywhere make it easy for strangers to reconstruct who you are, where you are and what you like. In some cases, a simple Google search can reveal what you think. Like it or not, increasingly we live in a world where you simply cannot keep a secret.
The key question is: Does that matter?
For many Americans, the answer apparently is “no.”
When opinion polls (民意测验) ask Americans about privacy, most say they are concerned about losing it. A survey found a serious depression about privacy, with 60 percent of respondents saying they feel their privacy is “slipping away, and that bothers me.”
But people say one thing and do another. Only a tiny part of Americans change any behaviors in an effort to preserve their privacy. Few people turn down a discount at tollbooths (收费站) to avoid using the EZ-Pass system that can track automobile movements. And few turn down supermarket loyalty cards. Privacy economist Alessanfro Acquisti has run a series of tests that reveal people will surrender personal information like Social Security numbers just to get their hands on a pitiful 50-cents-off coupon (优惠券).
But privacy does matter—at least sometimes. It’s like health: when you have it, you don’t notice it. Only when it’s gone do you wish you’d done more to protect it.
1.What would psychologists advise on the relationships between friends?
A. Friends should open their hearts to each other.
B. Friends should always be faithful to each other.
C. There should be a distance even between friends.
D. There should be fewer disagreements between friends.
2.Why does the author say “we live in a world where you simply cannot keep a secret”?
A. Modern society has finally developed into an open society.
B. People leave traces around when using modern technology.
C. There are always people who are curious about others’ affairs.
D. Many search engines profit by revealing people’s identities.
3.What do most Americans do about privacy protection?
A. They change behaviors that might disclose their identity.
B. They use various loyalty cards for business deals.
C. They rely more and more on electronic devices.
D. They talk a lot but hardly do anything about it.
4.According to the passage, privacy is like health because __________.
A. people will make every effort to keep it
B. its importance is rarely understood
C. it is something that can easily be lost
D. people don’t cherish it until they lose it
高二英语阅读理解简单题查看答案及解析
Someday a stranger will read your e-mail without your permission or scan the websites you’ve visited. Or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping preferences or calling habits.
In fact, it’s likely that some of these things have already happened to you. Who would watch you without your permission? It might be a husband or wife, a girlfriend, a marketing company, a boss, a cop or a criminal. Whoever it is, they will see you in a way you never intended to be seen—the 21st century equivalent (相等物) of being caught naked.
Psychologists tell us boundaries are healthy, that it’s important to reveal yourself to friends, family and lovers in stages, at appropriate times. But few boundaries remain. The digital bread pieces you leave everywhere make it easy for strangers to reconstruct who you are, where you are and what you like. In some cases, a simple Google search can reveal what you think. Like it or not, increasingly we live in a world where you simply cannot keep a secret.
The key question is Does that matter?
For many Americans, the answer apparently is “no.”
When opinion polls ask Americans about privacy, most say they are concerned about losing it. A survey found a serious depression about privacy, with 60 percent of respondents saying they feel their privacy is “slipping away, and that bothers me.”
But people say one thing and do another. Only a tiny part of Americans change any behaviors in an effort to preserve their privacy. Few people turn down a discount at tollbooths (收费站) to avoid using the EZ-Pass system that can track automobile movements. And few turn down supermarket loyalty cards. Privacy economist Alessanfro Acquisti has run a series of tests that reveal people will surrender personal information like Social Security numbers just to get their hands on a pitiful 50-cents-off coupon (优惠券).
But privacy does matter—at least sometimes. It’s like health.When you have it, you don’t notice it. Only when it’s gone do you wish you’d done more to protect it.
1. What would psychologists advise on the relationships between friends?
A. There should be a distance even between friends.
B. Friends should always be faithful to each other.
C. Friends should open their hearts to each other.
D. There should be fewer disagreements between friends.
2. Why does the author say “we live in a world where you simply cannot keep a secret”?
A. People leave tracks around when using modern technology.
B. Modern society has finally developed into an open society.
C. There are always people who are curious about others’ affairs.
D. Many search engines profit by revealing people’s identities.
3. What do most Americans do about privacy protection?
A. They change behaviors that might disclose their identity.
B. They talk a lot but hardly do anything about it.
C. They rely more and more on electronic devices.
D. They use various loyalty cards for business deals.
4. According to the passage, privacy is like health because __________.
A. its importance is rarely understood
B. people don’t treasure it until they lose it
C. it is something that can easily be lost
D. people will make every effort to keep it
高二英语阅读理解中等难度题查看答案及解析
Someday a stranger will read your e-mail without your permission or scan the websites you’ve visited. Or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping preferences or calling habits.
In fact, it’s likely some of these things have already happened to you. Who would watch you without your permission? It might be a spouse, a girlfriend, a marketing company, a boss, a cop or a criminal. Whoever it is, they will see you in a way you never intended to be seen—the 21st century equivalent (相等物) of being caught naked.
Psychologists tell us boundaries are healthy, that it’s important to reveal yourself to friends, family and lovers in stages, at appropriate times. But few boundaries remain. The digital bread pieces you leave everywhere make it easy for strangers to reconstruct who you are, where you are and what you like. In some cases, a simple Google search can reveal what you think. Like it or not, increasingly we live in a world where you simply cannot keep a secret.
The key question is: Does that matter?
For many Americans, the answer apparently is “no.”
When opinion polls (民意测验) ask Americans about privacy, most say they are concerned about losing it. A survey found a serious depression about privacy, with 60 percent of respondents saying they feel their privacy is “slipping away, and that bothers me.”
But people say one thing and do another. Only a tiny part of Americans change any behaviors in an effort to preserve their privacy. Few people turn down a discount at tollbooths (收费站) to avoid using the EZ-Pass system that can track automobile movements. And few turn down supermarket loyalty cards. Privacy economist Alessanfro Acquisti has run a series of tests that reveal people will surrender personal information like Social Security numbers just to get their hands on a pitiful 50-cents-off coupon (优惠券).
But privacy does matter—at least sometimes. It’s like health: when you have it, you don’t notice it. Only when it’s gone do you wish you’d done more to protect it.
1.What would psychologists advise on the relationships between friends?
A. Friends should open their hearts to each other.
B. Friends should always be faithful to each other.
C. There should be a distance even between friends.
D. There should be fewer disagreements between friends.
2. Why does the author say “we live in a world where you simply cannot keep a secret”?
A. Modern society has finally developed into an open society.
B. People leave traces around when using modern technology.
C. There are always people who are curious about others’ affairs.
D. Many search engines profit by revealing people’s identities.
3.What do most Americans do about privacy protection?
A. They change behaviors that might disclose their identity.
B. They use various loyalty cards for business deals.
C. They rely more and more on electronic devices.
D. They talk a lot but hardly do anything about it.
4.According to the passage, privacy is like health because __________.
A. people will make every effort to keep it
B. its importance is rarely understood
C. it is something that can easily be lost
D. people don’t cherish it until they lose it
高二英语阅读理解简单题查看答案及解析
It was the men's skating finals of the Winter Olympics when I was 16. Someday I'd be in the Olympics._________ , it was my dream.
That night I lay on our living room floor excitedly watching the_______ between the Brians: American Brian Boitano facing Brian Orser in Canada. Both of them had been world champions. Both of them_______to win. Naturally I was for Brian Boitano, a northern Californian like me. We had skated _______the same ice. I held my breath in amazement.Boitano _______ successfully. The gold medal! I jumped in the _________when his score went up.
But what happened next is what I'll never forget. Brian Boitano sat in front of the camera with his coach, _______ by a group of journalists. He was talking about his career and his medal, talking to the whole world. A terrible _______ feeling went through me. I could never be in the Olympics, I thought. I could not talk in public like that. Just the idea of a press conference _______ me.
I loved skating partly because I didn't have to talk. I could ________ myself with my jumps and dances better. I didn't have to stand up and give a speech like some teachers expected. I could feel the blood ________ to my face if I thought a teacher was going to call me. I ________ at my shoes. I was sure I'd make a(n) ________of myself.
The next day I was at the rink (溜冰场) as usual. I was practicing a combination of jumps that had once seemed ________. I worked very hard the next few years, on the ice and especially off. After journalists talked to me and although my heart ________every time I spoke to them, I got to know them. They became ________ faces. And they got to know me. So when my big ________came four years after Brian's, I was ready.
Sometimes I think my biggest accomplishment was not winning the gold __________talking to the press afterwards. When you do the thing you iear most, you put an end to fear.
Fear can stop you dead in your tracks. Fear can ________ a dream. What are you afraid of?What scares you more than anything else? This year, walk ________ up to it and conquer it,step by step.
1.A.In fact B.As a consequence C.Ahead of D.As well
2.A.case B.appointment C.battle D.conflict
3.A.applied B.attended C.suspected D.deserved
4.A.on B.for C.off D.in
5.A.arranged B.performed C.processed D.approved
6.A.capsule B.air C.excitement D.photograph
7.A.rejected B.treated C.assisted D.surrounded
8.A.sinking B.delighted C.motivated D.willing
9.A.attracted B.impressed C.terrified D.updated
10.A.enjoy B.express C.clarify D.adjust
11.A.flow B.pour C.slide D.rush
12.A.stared B.glared C.concentrated D.polished
13.A.guest B.victim C.fool D.amateur
14.A.thrilling B.complex C.impossible D.splendid
15.A.lightened B.pounded C.settled D.broke
16.A.enthusiastic B.greedy C.eager D.familiar
17.A.moment B.ceremony C.assignment D.accomplishment
18.A.or B.also C.but D.and
19.A.achieve B.kill C.blame D.lack
20.A.very B.away C.from D.right
高二英语完形填空中等难度题查看答案及解析
If you keep on doing stupid things like this, you'll get _______ someday!
A. punished B. punishing
C. being punished D. to punish
高二英语单项填空中等难度题查看答案及解析
When I was 17, I read a quote: “If you live each day as if it were your last, someday you’ll most certainly be right.” It made a(n) 36 on me，and since then，for the past 33 years, I have looked in the mirror every morning and asked myself: “If today were the 37 day of my life，would I want to do what I am about to do today?” And whenever the answer has been “No” for too many days in a row, I know I need to 38 something．
Remembering that I’ll be 39 soon is the most important tool to help me make the big choices in life, 40 almost everything—all expectations, all pride, all fear of embarrassment or failure—just falls away in the face of death, 41 only what is truly important. Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to 42. You are already naked．There is no reason not to follow your heart.
No one wants to die. Even people who want to go to 43 don’t want to die to get there. And yet death is the destination we all share. No one has ever 44 it, because Death is very likely to be the single best invention of Life. It clears out the old to 45 for the new. Right now the new is you, but someday not too long from now, you will 46 become the old and be cleared away.
Your time is 47, so don’t waste it living someone else’s life. Don’t let the noise of other’s opinions drown out your own inner voice．Everything else is secondary.
1. A．surprise B．impression C．choice D．call
2. A．last B．first C．worst D．best
3. A．change B．supply C．provide D．achieve
4. A．dead B．fired C．murdered D．failed
5. A．despite B．because C．though D．if
6. A．including B．possessing C．leaving D．facing
7. A．value B．reach C．gain D．lose
8. A．sky B．space C．universe D．heaven
9. A．experienced B．encountered C．escaped D．observed
10. A．make good B．make up C．make way D．make clear
11. A．dramatically B．gradually C．regularly D．likely
12. A．important B．narrow C．perfect D．limited
高二英语完型填空中等难度题查看答案及解析