Your cellphone holds secrets about you. Besides the names and numbers that you’ve programmed into it, traces of your DNA remain on it, according to a new study.
DNA is genetic material that appears in every cell. Like your fingerprint, your DNA is unique to you - unless you have an identical twin. Scientists today usually analyze DNA in blood, saliva (唾液)or hair left behind at the scene of a crime. The results often help detectives identify criminals and victims.
Meghan J. McFadden, a biologist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cellphone and later dropped it. This made her wonder whether traces of DNA remained on cellphones - even when no blood was involved. To find out, she and a colleague collected flip-style (翻盖式)phones from 10 volunteers. They collected invisible traces of the users from two parts of the phone: the outside, where the user holds it, and the speaker, which is placed at the user’s ear.
The scientists cleaned the phones using a liquid mixture made mostly of alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones back for another week. Then they returned the phones and the researchers collected traces on each phone once more. They discovered DNA that belonged to the phone’s owner on each of the phones.
Surprisingly, DNA was even picked up immediately after the phones were cleaned. That suggests that washing won’t remove all traces of evidence from a criminal’s cellphone. So cellphones can be added to the list of clues that can settle a crime-scene investigation.
64. In a crime-scene investigation, now experts are likely to turn to ________.
A. the criminal’s fingerprint B. the DNA analysis of physical items
C. the detectives D. the criminal’s cellphone
65. According to the passage, McFadden was inspired by ________.
A. the secrets stored in people’s cellphones B. the special characters of DNA
C. a cellphone-involved case D. the challenging job of detectives
66. According to the passage, the potential application of the new study would be ________.
A. identifying criminals B. designing new cellphones
C. protecting individual privacy D. preventing cellphone-involved crimes
67. Which of the following has the closest meaning with the underlined word “identify” in Paragraph 2?
A. imagine B. recognize C. discover D. determine
高三英语阅读理解简单题
Your cellphone holds secrets about you. Besides the names and numbers that you’ve programmed into it, traces of your DNA remain on it, according to a new study.
DNA is genetic material that appears in every cell. Like your fingerprint, your DNA is unique to you - unless you have an identical twin. Scientists today usually analyze DNA in blood, saliva (唾液)or hair left behind at the scene of a crime. The results often help detectives identify criminals and victims.
Meghan J. McFadden, a biologist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cellphone and later dropped it. This made her wonder whether traces of DNA remained on cellphones - even when no blood was involved. To find out, she and a colleague collected flip-style (翻盖式)phones from 10 volunteers. They collected invisible traces of the users from two parts of the phone: the outside, where the user holds it, and the speaker, which is placed at the user’s ear.
The scientists cleaned the phones using a liquid mixture made mostly of alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones back for another week. Then they returned the phones and the researchers collected traces on each phone once more. They discovered DNA that belonged to the phone’s owner on each of the phones.
Surprisingly, DNA was even picked up immediately after the phones were cleaned. That suggests that washing won’t remove all traces of evidence from a criminal’s cellphone. So cellphones can be added to the list of clues that can settle a crime-scene investigation.
64. In a crime-scene investigation, now experts are likely to turn to ________.
A. the criminal’s fingerprint B. the DNA analysis of physical items
C. the detectives D. the criminal’s cellphone
65. According to the passage, McFadden was inspired by ________.
A. the secrets stored in people’s cellphones B. the special characters of DNA
C. a cellphone-involved case D. the challenging job of detectives
66. According to the passage, the potential application of the new study would be ________.
A. identifying criminals B. designing new cellphones
C. protecting individual privacy D. preventing cellphone-involved crimes
67. Which of the following has the closest meaning with the underlined word “identify” in Paragraph 2?
A. imagine B. recognize C. discover D. determine
高三英语阅读理解简单题查看答案及解析
Could your cellphone give you cancer? Whether it could or not,some people are worrying about the possibility that phones,powerlines and wi-fi could be responsible for a range of illnesses,from rashes to brain tumors.
For example,Camilla Rees,48,a former investment banker in the US,moved out of her apartment in San Francisco because of the radiation coming from next door.Rees told the Los Angeles Times that when her neighbors moved in and installed a wi-fi router she lost her ability to think clearly.“I would wake up dizzy in the morning.I’d fall to the floor.I had to leave to escape that nightmare,” she saiD. Since then,she’s been on a campaign against low-level electromagnetic fields,or EMFs(低频电磁场).
And she’s not alone.Millions of people say they suffer from headaches,depression,nausea and rashes when they’re too close to cellphones or other sources of EMFs.
Although the World Health Organization has officially declared that EMFs seem to pose little threat,governments are still concerneD. In fact,last April,the European Parliament called for countries to take steps to reduce exposure to EMFs.The city of San Francisco and the state of Maine are currently considering requiring cancer-warning labels on cellphones.
If these fears are reasonable,then perhaps we should all be worried about the amount of time we spend talking on our phones or plugging into wi-fi hotpots.
Some say there is evidence to support the growing anxieties.David Carpenter,a professor of environmental health sciences at the University at Albany,in New York,thinks there’s a greater than 95% chance that power lines can cause childhood leukemiA. Also there’s a greater than 90% chance that cellphones can cause brain tumors.
But others believe these concerns are unreasonable paranoia (猜疑).Dr.Martha Linet,the head of radiation epidemiology at the US National Cancer Institute,has looked at the same research as Carpenter but has reached a different conclusion.“I don’t support warning labels for cellphones,” said Linet.“We don’t have the evidence that there’s much danger.”
Studies so far suggest a weak connection between EMFs and illness — so weak that it might not exist at all.A multinational investigation of cellphones and brain cancer,in 13 countries outside the US,has been underway for several years.It’s funded in part by the European Union,in part by a cellphone industry group.
According to Robert Park,a professor of physics at the University of Maryland in the US,the magnetic waves aren’t nearly powerful enough to break apart DNA,which is now known threats,such as UV rays and X-rays,cause cancer.
Perhaps it’s just psychological.Some experts find that the electro-sensitivity syndrome seems to be similar to chemical sensitivity syndrome,which is a condition that’s considered to be psychological.
Whether EMFs are harmful or not,a break in the countryside,without the cellphone,would probably be good for all of us.
高三英语填空题中等难度题查看答案及解析
See a cellphone cover that you like on Taobao? Forget about placing an order, paying the bill online and waiting for days for it to be delivered to you. In the near future, you'll be able to get it in minutes just by hitting “print” on your computer.
You might find it hard to believe that you could actually “print” an object like you would a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays ink onto paper line by line, modern 3D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.
Instead of ink, the materials the 3D printer uses are mainly plastic, resin(树脂) and certain metals. The thinner each layer is—from a millimetre to less than the width of a hair—the smoother and finer the object will be.
This may sound like a completely new technology, but the truth is that 3D printing has been around since the late 1980s. Back then, it was barely affordable for most people, so few knew about it.
Last year, though, saw a big change in the 3D printing industry—printers became much cheaper. For example, 10 years ago a desktop 3D printer might have cost £20,000, while now they cost only about £1,000, according to the BBC.
Taken out of the factory and introduced to more diverse and common uses, 3D printing can create just about anything you can think of—flutes , bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one.
However, as 3D printing becomes more common, it may bring about certain problems—such as piracy. “Once you can download a coffee maker, or print out a new set of kitchen utensils (餐具) on your personal 3D printer, who will visit a retail store again?” an expert in 3D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3D printer to print out a fully functioning gun?
1.According to the article, in the future, the 3D printing technology will _______.
A. enable people to make better purchases online
B. change the way we make many products
C. be applied as widely in our daily life as computers
D. shorten the time it takes for people to get what they buy online
2.What happened in the 3D printing industry last year?
A. The 3D printing technology was taken out of the factory.
B. The 3D printing technology began to be used in various fields.
C. The 3D printer was used for medical treatment for the first time.
D. The 3D printer became more affordable for consumers.
3.What is the best title of the passage?
A. Great Demand for 3D Printers B. Technology in the Future
C. Online Shopping Disappearing D. Printing out Everything
4.How is the last paragraph developed?
A. By giving examples.
B. By making comparisons.
C. By analyzing the cause and effect.
D. By presenting research findings.
高三英语阅读理解中等难度题查看答案及解析
See a cellphone cover that you like on Taobao? Forget about placing an order, paying the bill online and waiting for days for it to be delivered to you. In the near future, you'll be able to get it in minutes just by hitting “print” on your computer.
You might find it hard to believe that you could actually “print” an object like you would a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays ink onto paper line by line, modern 3D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.
Instead of ink, the materials the 3D printer uses are mainly plastic, resin and certain metals. The thinner each layer is—from a millimetre to less than the width of a hair—the smoother and finer the object will be.
This may sound like a completely new technology, but the truth is that 3D printing has been around since the late 1980s. Back then, it was barely affordable for most people, so few knew about it.
Last year, though, saw a big change in the 3D printing industry—printers became much cheaper. For example, 10 years ago a desktop 3D printer might have cost £20,000, while now they cost only about £1,000, according to the BBC.
Taken out of the factory and introduced to more diverse and common uses, 3D printing can create just about anything you can think of—flutes , bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one.
However, as 3D printing becomes more common, it may bring about certain problems—such as piracy. “Once you can download a coffee maker, or print out a new set of kitchen utensils on your personal 3D printer, who will visit a retail store again?” an expert in 3D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3D printer to print out a fully functioning gun?
1.According to the article, in the future, the 3D printing technology will _______.
A. enable people to make better purchases online
B. change the way we make many products
C. be applied as widely in our daily life as computers
D. shorten the time it takes for people to get what they buy online
2.What happened in the 3D printing industry last year?
A. The 3D printing technology was taken out of the factory.
B. The 3D printing technology began to be used in various fields.
C. The 3D printer was used for medical treatment for the first time.
D. The 3D printer became more affordable for consumers.
3.How is the last paragraph developed?
A. By giving examples.
B. By making comparisons.
C. By analyzing the cause and effect.
D. By presenting research findings.
4.What is the best title of the passage?
A. Great Demand for 3D Printers
B. Technology in the Future
C. Online Shopping Disappearing
D. Printing out Everything
高三英语阅读理解中等难度题查看答案及解析
See a cellphone cover that you like on Taobao? Forget about placing an order, paying the bill online and waiting for days for it to be delivered to you. In the near future, you'll be able to get it in minutes just by hitting “print” on your computer. You might find it hard to believe that you could actually “print” an object like you would draw a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays ink onto paper line by line, modern 3D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape.
Instead of ink, the materials the 3D printer uses are mainly plastic, resin(树脂) and certain metals. The thinner each layer is—from a millimetre to less than the width of a hair—the smoother and finer the object will be. This may sound like a completely new technology, but the truth is that 3D printing has been around since the late 1980s. Back then, it was barely affordable for most people, so few knew about it.
Last year, though, saw a big change in the 3D printing industry—printers became much cheaper. For example, 10 years ago a desktop 3D printer might have cost £20,000, while now they cost only about £1,000, according to the BBC. Taken out of the factory and introduced to more diverse and common uses, 3D printing can create just about anything you can think of—flutes, bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one.
However, as 3D printing becomes more common, it may bring about certain problems—such as piracy. “Once you can download a coffee maker, or print out a new set of kitchen utensils (餐具) on your personal 3D printer, who will visit a retail store again?” an expert in 3D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3D printer to print out a fully functioning gun?
1.According to the article, in the future, the 3D printing technology will _______.
A. enable people to make better purchases online
B. change the way we make many products
C. be applied as widely in our daily life as computers
D. shorten the time it takes for people to get what they buy online
2.What happened in the 3D printing industry last year?
A. The 3D printing technology was taken out of the factory.
B. The 3D printing technology began to be used in various fields.
C. The 3D printer was used for medical treatment for the first time.
D. The 3D printer became more affordable for consumers(消费者).
3.What is the best title of the passage?
A. Great Demand for 3D Printers
B. Technology in the Future
C. Online Shopping Disappearing
D. Printing out Everything
4.How is the last paragraph developed?
A. By giving examples.
B. By making comparisons.
C. By analyzing the cause and effect.
D. By using figures.
高三英语阅读理解中等难度题查看答案及解析
If you’re secretly worried about your smartphone addiction, then the new NoPhone might be just the thing you need.It looks and feels exactly like a smartphone,but it does nothing.It's just a piece of plastic that you can carry around in your hand to fool yourself.
Dutch designer lngmar Larsen came up with the idea as a joke along with his two friends.To their great surprise,the idea received a lot of attention online and people from all over the world stated placing requests for NoPhones of their own.So that’s when the three friends decided to turn to collect enough fund for mass production.
NoPhone is currently a prototype(模型)that will cost only $12 once it hits the market.It is 5.5 inches high,2.6 inches wide and 0.29 inches thick, bringing it quite close to the latest smartphones on the market.It is described as“battery free”,“no upgrades necessary”,“shatterproof(抗震)”,“waterproof'’and“an alternative to constant hand-to-phone contact that allows you to stay connected with the real world”.
“Phone addiction is everywhere.”the designers insist.“It’s ruining your dates.It’s distracting you at concerts.It’s blocking sidewalks.Now,there is a real solution.With a thin.1ight and completely wireless design,the NoPhone acts as a substitute to any smart mobile device,enabling you to always have a phone to hold without giving up potential engagement with your direct environment.”
If you’re interested in NoPhone,but concerned about not being able to take selfies(自拍) anymore.Don’t feel upset.The makers do have an upgrade at no extra charge—the mirror sticker.That way,they say,you can enjoy‘real-time’selfies with your friends when they’re standing right behind you.
1.What can NoPhone do for people according to the text?
A.It is actually a new kind of real smartphone.
B.It can help us stay away from the real world.
C.It helps get rid of people’s smartphone addiction.
D.It’s just a piece of plastic and can do nothing.
2.What is Paragraph 3 mainly about?
A.The size of Nophone.
B.The inventors of Nophone.
C.The material of Nophone.
D.A brief description of Nophone.
3.What can we learn from the passage?
A.NoPhone has received unexpected attention.
B.NoPhone can completely replace smartphones.
C.The designers have made lots of money from Nophone.
D.NoPhone is able to take selfies as smartphones do.
4.What type of writing is this passage?
A.A traveI guide. B.A scientific report.
C.A medical record. D.An official document.
高三英语阅读理解中等难度题查看答案及解析
It has happened to all of us.You want to talk about an object,but you forgot the name of it.Or you never knew the name at all.Maybe you are not even sure there is a word for it.
For example,that thing, that you need to fix your bicycle.Or perhaps it is something you need for your computer·Or that part on your motorcycle that never,ever seems to work.
What are these things?
They are called“doohickies"·A doohickey is a word you use when you do not know,or you have forgotten,the real name of an object·
The MacMillan Dictionary defines doohickey as“something such as a small object or tool that you cannot remember the name of"·The American Heritage Dictionary says it is“something,especially a small device or part,whose name is unknown or forgotten".
Language experts say the word first started being used in the United States in the early 1900s· But other experts say they have seen examples of words like that in writings from the middle 1800s.
The Merriam-Webster Dictionary for Learners of American English gives this example of how native speakers might use doohickey:“I need one of those doohickeys,you know,with the long handle.”
Merriam-Webster adds that doohickey may be a combination of two other words:“doodad" and“hickey" .Strange as it may be,both of these words mean the same as doohickey.The dictionary lists a lot of strange words as.synonyms for doohickey.The most common are whatchamacallit,whatnot and whatsit.
You will probably never see these words in official documents or newspaper reports·But you might hear them in informal American English,when people are talking to each other·
“Hey,what does this doohickey do,anyway?”
"Dude,bring me that thingamajig,willya·”
"Janine,can you get me one of those whatchamacallits?”
Most Americans will know what you are talking about if you use one of those words.Just point at the object,use one of these words,and they will bring it to you·
1.When people need a doohickey it means they need something__·
A.which can be used to repair a bicycle
B.which can be used to fix a computer
C.whose name is forgotten
D.whose handle is very long
2.The words similar to doohickey were most likely to be seen in__for the first time.
A.1800 B.1850 C.1900 D.1950
3.You are sure to find the word whatchamacallit in__
A.the Macmillan Dictionary
B.the American Heritage Dictionary
C.an Official document or a newspaper report
D.the Merriam-Webster Dictionary for Learners of American English
4.The above,passage is mainly about__·
A.a special word
B.American English dictionaries’
C.the development of American English
D.the way to learn and use American English
高三英语阅读理解中等难度题查看答案及解析
What Secrets Your Voice Reveals About You
So, have you ever stepped back and wondered what your voice sounds like to other people?1.. And it turns out, it says a lot about us.
·Your voice hints at how social you are
2.. Extroverts tend to talk loudly, quickly, and excitedly. Introverts tend to speak quietly and more slowly. So, if you're that loud person at a party, you'll probably find that all eyes are on you, whereas introverts won't likely be at that party at all.
·Your voice says something about your height
This may sound strange, but if people close their eyes and hear you speak, they can probably tell if you're tall or short.3., whereas shorter people tend to have a higher voice. This is true for both men and women.
·4.
If you've noticed a lot of changes in a person's voice—the pace at which they talk, the tone and pitch of their voice, or whether their voice has become quieter—they may have Parkinson's disease. These changes can happen in the voice due to the tremors(震颤)that a patient would be experiencing.
·Your voice can tell how successful you are
Successful people's voices tend to be of a lower, warmer tone. Their words come out evenly, and their vocal cords won't be tight.5., but not so loudly that they're unpleasant to listen to.
A.Taller people tend to have a deeper voice
B.Your voice can tell others about your health
C.Your voice reveals how professional you are
D.They'll speak loudly enough to make themselves heard
E.A confident person will have a smooth and steady tone
F.Specifically, people can tell whether you're an extrovert or introvert
G.Your friends and family can probably identify you just by the sound of your voice
高三英语七选五中等难度题查看答案及解析
--Could you send me an application for the TOEFL ?
-- What’s your name and address ?
A.Yes, I could | B.Just a moment | C.That,s right | D.No problem |
高三英语单项填空简单题查看答案及解析
— Could you send me an application for the TOEFL?
— _______. What’s your name and address?
A.Yes, I could B.Just a moment C.That’s right D.No problem
高三英语单项填空中等难度题查看答案及解析