Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone makers include in the small print that is often ignored when a new phone is purchased Apple, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters.
If health issues arise from cell phone use, the possible effects are huge. According to Devra Davis, an expert who has worked for the University of Pittsburgh, brain cancer is a concern. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20—29 age group and a drop for the older population.
“Most cancers have many causes,” she says, but she points to laboratory research that suggests low energy radiation could damage cells that could possibly lead to cancer.
Children are more vulnerable to radiation than adults, Ms. Davis and other scientists point out: Radiation that penetrates（穿透）only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls（头骨）are thinner and their brains contain more absorptive（易吸收的）fluid.
Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiation had damaged DNA in their brains.
Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the belly（腹部）.
1.Why is the warning in the small print?
A.They think people will not mind it. B.The warning is not important at all.
C.They don’t want the users to notice it. D.There is too little space for the warning.
2.What does the underlined word “vulnerable” in the 4th paragraph probably mean?
A.elegant B.sensitive
C.dynamic D.relevant
3.Why do children easily be affected by radiation?
A.Because they don’t know about such dangerous radiation.
B.Because they enjoy using cell phones more often than adults.
C.Because they are not strong enough to fight against radiation.
D.Because their skulls are thinner and their brains are easily hurt.
高二英语阅读选择中等难度题
Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone makers include in the small print that is often ignored when a new phone is purchased Apple, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters.
If health issues arise from cell phone use, the possible effects are huge. According to Devra Davis, an expert who has worked for the University of Pittsburgh, brain cancer is a concern. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20—29 age group and a drop for the older population.
“Most cancers have many causes,” she says, but she points to laboratory research that suggests low energy radiation could damage cells that could possibly lead to cancer.
Children are more vulnerable to radiation than adults, Ms. Davis and other scientists point out: Radiation that penetrates（穿透）only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls（头骨）are thinner and their brains contain more absorptive（易吸收的）fluid.
Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiation had damaged DNA in their brains.
Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the belly（腹部）.
1.Why is the warning in the small print?
A.They think people will not mind it. B.The warning is not important at all.
C.They don’t want the users to notice it. D.There is too little space for the warning.
2.What does the underlined word “vulnerable” in the 4th paragraph probably mean?
A.elegant B.sensitive
C.dynamic D.relevant
3.Why do children easily be affected by radiation?
A.Because they don’t know about such dangerous radiation.
B.Because they enjoy using cell phones more often than adults.
C.Because they are not strong enough to fight against radiation.
D.Because their skulls are thinner and their brains are easily hurt.
高二英语阅读选择中等难度题查看答案及解析
Cell phones：Is there a cancer link?
Could your cell phone give you cancer? Whether it could or not, some people are worrying about the possibility that phones, power lines and Wi-Fi could be responsible for a range of illnesses, from rashes to brain tumors.
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 percent chance that power lines can cause childhood leukemia (白血病). Also there’s a greater than 90 percent chance that cell phones can cause brain tumors. “It’s apparent now that there’s a real risk, ”said Carpenter.
But others believe these concerns are not justified. Dr Martha Linet, head of radiation epidemiology (流行病学) 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 cell phones, ”said Linet. “We don’t have the evidence that there’s much danger.”
Studies so far suggest a weak connection between EMFs (电磁场) and illness—so weak that it might not exist at all. A multinational investigation of cell phones 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 cell phone industry group. The final report should come out later this year, but data so far don’t suggest a strong link between cell phone use and cancer risk.
1.From the passage we can learn that some people are worried because________.
A. they have evidence that the use of cell phones can lead to cancer
B. they feel surprised and alarmed about cell phone use
C. some experts have given a warning
D. cell phones are responsible for brain tumors
2.By saying “I don’t support warning labels for cell phones, ”Dr Martha Linet has the idea that_______.
A. the worrying is unnecessary
B. cancer—warning labels should be on cell phones
C. there is a link between cell phones and cancer
D. cell phones have nothing to do with cancer
3.Which of the following best describes the attitude of the author towards the debate?
A. Optimistic. B. Objective.
C. Opposite. D. Casual.
4.The underlined word “justified” in Paragraph 3 is closest in meaning to_____．
A. explained B. confirmed （证实、确认）
C. classified D. restricted （限制）
高二英语阅读理解中等难度题查看答案及解析
Cell Phones Are the New Cigarettes
When you get in your car, you reach for it．When you’re at work, you take a break to have a moment alone with it．When you get into a lift, you play with it．
Cigarettes? Cup of coffee? No, it’s the third most addictive thing in modern life, the cell phone．And experts say it is becoming more difficult for many people to curbtheir longing to hug it more tightly than most of their personal relationships．
With its shiny surface, its smooth and satisfying touch, its air of complexity, the cell phone connects us to the world even as it disconnects us from people three feet away．In just the past couple of years, the cell phone has challenged individuals, employers, phone makers and counselors（顾问）in ways its inventors in the late 1940s never imagined．
The costs are becoming even more evident, and I don’t mean just the monthly bill．Dr．Chris Knippers, a counselor at the Betty Ford Center in Southern California, reports that the overuse of cell phones has become a social problem not much different from other harmful addictions: a barrier to one-on-one personal contact, and an escape from reality．
Sounds extreme, but we’ve all witnessed the evidence: The person at a restaurant who talks on the phone through an entire meal, ignoring his kids around the table; the woman who talks on the phone in the car, ignoring her husband; the teen who texts messages all the way home from school, avoiding contact with kids all around him．
Is it just rude, or is it a kind of unhealthiness? And pardon me, but how is this improving the quality of life?
Jim Williams, an industrial sociologist based in Massachusetts, notes that cell-phone addiction is part of a set of symptoms in a widening gulf of personal separation．He points to a study by Duke University researchers that found one-quarter of Americans say they have no one to discuss their most important personal business with．Despite the growing use of phones, e-mail and instant messaging, in other words, Williams says studies show that we don’t have as many friends as our parents. “Just as more information has led to less wisdom, more acquaintances via the Internet and cell phones have produced fewer friends,” he says．
If the cell phone has truly had these effects, it’s because it has become very widespread．Consider that in 1987, there were only 1 million cell phones in use．Today, something like 300 million Americans carry them．They far outnumber wired phones in the United States．
1.Which of the following best explains the title of the passage?
A．Cell phone users smoke less than they used to．
B．Cell phones have become as addictive as cigarettes．
C．More people use cell phones than smoke cigarettes．
D．Using cell phone is just as cool as smoking cigarettes．
2.The underlined word “curb” in Paragraph 2 means ____．
A．rescue B．ignore C．develop D．control
3.The example of a woman talking on the phone in the car supports the idea that ________．
A．women use cell phones more often than men
B．talking on the phone while driving is dangerous
C．cell phones do not necessarily bring people together
D．cell phones make one-on-one personal contact easy
高二英语阅读理解中等难度题查看答案及解析
Because travel is as much about the journey as the destination, the right accessories((配件) make a difference to the jet-setters on your gift list.
Smart carry-on suitcase
There's nothing worse than landing in a foreign city and realizing you have no way to call Uber because your phone died while you were delayed before takeoff and unable to find a plug. If your suitcase is the Millennial Power Bank Spinner from Traveler's Choice, problems like this will be a thing of the past If you remember to charge it up along with your phone the night before your flight, you'll always have a charge in reserve.
Purchase: via NORDSTOMRACK.COM $189.97
Noise-canceling headphones
Few things are more needed by travelers than a quality pair of noise-canceling headphones. The Bose Noise Cancelling Wireless Bluetooth Headphones 700 has 11 levels of noise canceling power so you can control your environment as needed, and four microphones that pick up and separate your voice so you can still take calls, even in a noisy airport. Plus, it offers one-touch access to Google Assistant or Alexa, and 20 hours of battery life, which should get you most anywhere in the world on a single charge.
Purchase: via AMAZON.COM $399
Multi-purpose jacket
Sure, jackets are a great way to add a layer of warmth——but that's just about any conventional jacket with two front pockets. If the traveler on your list is a techie, he or she will be thrilled with the Baubax bomber jacket 2.0. which has 25 features to ensure everything stays organized and readily available. It comes with built-in neck pillow, travel footrest, eye mask, travel blanket, battery-charger pocket, bottle opener... and 12 pockets to place your tablet, phone, sunglasses and passport. Yes, 12...
Purchase: via BAUBAX.COM S238
Motion-sickness relief
There's a new choice for the traveler who suffers motion sickness. Reliefband 1.5, a drug-free wristband that uses patented, clinically proven, FDA-cleared technology to treat motion sickness. The wristband works by stimulating the nerve at the underside of the wrist with gentle pulses. It works for travel by plane, train, boat, or car, as well as for virtual reality gaming, amusement park rides, and even morning sickness.
Purchase: via AIMAZON.COM $94.99
1.What can a "Smart carry-on suitcase " do?
A.Guarantee a safe landing. B.Keep the cell phone alive.
C.Help avoid any trouble in flight. D.Ease the passengers' burden.
2.What's the additional function of "Noise-canceling headphones"?
A.It's of high quality. B.It's noise-proof.
C.It keeps a phone call clear. D.It can access Google Assistant.
3.Compared with ordinary jackets, the advantage of "Multi-purpose jacket" lies in .
A.its ability to keep warm B.its up-to-date design
C.its capacity to store stuff D.its affordable price
4.What can we learn about "Motion-sickness relief?
A.It's a smart wearable device.
B.It's a newly-invented pill.
C.It can cure any sickness.
D.It is effective only for passengers.
5.Which of the following is the cheapest one to purchase?
A.Smart carry-on suitcase. B.Noise-canceling headphones.
C.Multi-purpose jacket. D.Motion-sickness relief.
高二英语阅读选择中等难度题查看答案及解析
Age discrimination(歧视）is a large problem in the United States today. Teenagers are considered dishonest, old people are considered incapable(无能的）,kids considered noisy.
Picture this: a teenage boy, with a group of friends, walks laughing into a store.They read some magazines, walk by the candy, and then walk out without buying anything. What’s the first thought of this? It might be that they stole something. Maybe the employees would even go as far as to call the police about these boys, who didn’t steal anything but were discriminated against simply because they were “teenage boys”.
This happens every day, all over America. We don’t tell the kids much, because they won’t understand, they’re too young. We feel surprised when we see old people run marathons, or even take part in simple fun activities such as volleyball or swimming, because they are “old”, and “incapable".
People who are discriminated against, no matter what the reason, can be hurt by it.They can be offended, because it isn't something they can help.Like my example of the teenage boy above, he was simply having fun as he walked into the store.He wasn’t planning to steal anything or to cause any trouble; he could even be one of the best students in school, but he was discriminated against for being a teenager.
Of course,this doesn’t mean you should persuade your grandparents right away to run a marathon,but give them a little trust.They are capable of doing things we are,and sometimes more.So next time you tell your little brother that he’s “too young to understand” or think that your grandmother is “too old” to do sports, listen to yourself. I know you are offended by being considered as a teenager, so how do you think they feel? Remember, it all hurts. Everyone should have equal opportunities, no matter how old he is.
1.The underlined word “It” in Paragraph 2 refers to .
A.The fact B.The result
C.The thought D.The problem
2.The author mentions the teenage boy in Paragraph 2 to show that .
A.people should give more opportunities to teenagers
B.age discrimination is serious in today’s world
C.teenagers should behave in a proper way
D.it's really hard to depend on teenagers
3.The author holds the view that .
A.we shouldn’t judge others by their age
B.we should try to help incapable people
C.we should encourage old people to run marathons
D.we shouldn’t enter a store if we don’t want to buy anything
4.The text mainly discusses .
A.an unfortunate teenager
B.different age groups
C.equal opportunities
D.a social problem
高二英语阅读选择中等难度题查看答案及解析
This year’s flu season is pretty scary. To try to minimize the effects, public officials are still urging anyone who hasn’t yet gotten their flu shot to get one as soon as possible. However, even if every single person got a shot in the arm, the vaccine(疫 苗)—with its excellent 36 percent effectiveness—would not prevent everyone from getting infected with the annoying virus. Knowledge is power, so here's what goes on in your body when you come down with the flu.
The influenza virus primarily attacks your nose, throat, and the tubes that lead to your lungs. But the flu is so much more than that. Your muscles ache, your head hurts, and your appetite goes down, among other things. To our surprise, almost all of these symptoms have less to do with the virus itself than with your immune( 免 疫 的)response to them. Unfortunately, the very defense you have in place to get rid of the flu is the reason you feel so painful when you recover.
The virus usually enters through your mouth, typically by way of your hands . But it takes a few days for symptoms to set in. While this process might cause some harm to your nose and throat, it's nothing major, and nothing like the symptoms that typically accompany a bad or even mild case of the flu.
The real fun starts when your immune system begins to fight. Your immune system comes in two parts: the innate system and the adaptive. The innate immune system is essentially an all-purpose tool. As soon as your body senses the presence of any injury or invader , the innate immune system launches into action by producing tiny proteins called cytokines and chemokines. The cytokines reproduce almost immediately and start to attack the virus. This increase in immune cells creates a serious inflammation( 炎 症 ) throughout the body. But the worst is still to come.
Meanwhile, the chemokines work with the adaptive immune system to help create T cells. These cells are a special type of white blood cell that works in a much more specific way: They find the influenza virus, identify what's special about it, and create something unique on their surface that finds and destroys similar invaders.
1.What can we infer from Paragraph 1?
A.All the vaccine is not effective.
B.No one can avoid catching this year's flu.
C.This year's flu is the most serious one in recent years.
D.Public health officials have to use a gun when necessary.
2.Why many parts of your body suffer while you're recovering from a flu?
A.Because recovery from illness is painful.
B.Because your immune system is working against your defense system.
C.Because your body is fighting hard against the flu.
D.Because the influenza virus attacks your nose, throat and other parts.
3.The underlined word “fun” in Paragraph 4 can be replaced by .
A.joy B.battle
C.action D.program
4.What's the main idea of Paragraph 4?
A.The fight between innate immune system and the adaptive.
B.The categories of immune system.
C.The way immune system works.
D.The process of the development of immune system.
高二英语阅读选择困难题查看答案及解析
Teenagers who talk on the cell phone a lot, and hold their phones up to their right ears, score worse on one type of memory test. That’s the finding of a new study. That memory impairment might be one side effect of the radiation (放射线) that phones use to keep us connected while we’re on the go.
Nearly 700 Swiss teens took part in a test of figural memory. This type helps us remember abstract (抽象的) symbols and shapes, explains Milena Foerster. The teens took memory tests twice, one year apart. Each time, they had one minute to remember 13 pairs of abstract shapes. Then they were shown one item from each pair and asked to match it with one of the five choices. The study volunteers also took a test of verbal memory. That’s the ability to remember words. The two memory tests are part of an intelligence test. The researchers also surveyed the teens on how they use cell phones. And they got call records from phone companies. The researchers used those records to figure out how long the teens were using their phones. This allowed the researchers to work out how big a radiation exposure (接触) each person could have got while talking.
A phone user’s exposure to the radiation can differ widely. Some teens talk on their phones more than others. People also hold their phones differently. If the phone is close to the ear, more radiation may enter the body, Foerster notes. Even the type of network signal that a phone uses can matter. Much of Switzerland was using an older “second-generation” type of cell phone networks, the study reports. Many phone carriers (通讯公司) have moved away from such networks. And more companies plan to update their networks within the next few years.
The teens’ scores in the figural memory tests were roughly the same from one year to the next. But those who normally held their phones near the right ears, and who were also exposed to higher levels of radiation, scored a little bit worse after a year. No group of teens showed big changes on the verbal memory test. Why might one type of memory be linked to cell phone use, but not another? Foerster thinks it could have to do with where different memory centers sit in the brain. The site that deals with the ability to remember shapes is near the right ear.
1.According to Paragraph 2, which of the following is TRUE?
A.The teens took two types of memory tests four times in total.
B.The teens needed to report the average time spent on their phones.
C.Researchers paid little attention to the teens’ habits of using phones.
D.The teens’ ability of remembering words is shown in figural memory test.
2.What can we infer from Paragraph 3?
A.How people hold their phones has no effect on their bodies.
B.Phone users can make more money with new networks.
C.The cell phone network type has little to do the cell phone use.
D.Radiation levels are affected by the cell phone network types.
3.According to the study, teens who use their phones to their right ears a lot do worse in ________.
A.matching numbers B.reading signals
C.remembering shapes D.learning words
4.What might be the best title for the text?
A.Cell phone use and safety warnings
B.Facts about cell phone use at school
C.Dangerous levels of cell phone use among teens
D.Teen’s cell phone use linked to memory problems
高二英语阅读理解中等难度题查看答案及解析
Do you regularly get together to talk with your family about problems or the day’s events?1.Want to improve your family's communication skills? Try these simple steps.
Create opportunities for talking.
2.And if you do find yourself in the car running from place to place, turn off the cell phones, and use that opportunity to catch up on the day’s activities.
Insist on family meals.
In addition to bringing everyone together for a wrap-up(总结) of the day’s activities, insist on a few standing family meals. Use the family dinner table as an opportunity to share what’s going on in each other’s lives.
3.
Spend time with each of your children and let them know that they matter. Older teens might enjoy going out for a hamburger or a coffee at their favorite coffee place. Younger children often enjoy going to the supermarket, especially when you let them select their favorite food.
Listen more and speak less.
When trying to improve any relationship, listening is far more important than talking.4. It makes kids feel respected.
5.Children feel comfortable sharing their problems with their parents, reducing the risk of peers having a negative influence on their lives. Parents remain connected with each other and their children, strengthening the family bond. And the whole family develops a communication style that can help improve the quality of relationships outside the home.
A.Think twice about where you go.
B.Go on individual dates with your children.
C.Do you want to understand your children better?
D.Make time for talking by reducing the number of unnecessary activities your family is involved in.
E.When it comes to family communication, listen four times longer than you speak.
F.Conversation is the key to any strong relationship, and it is especially true of family communication.
G.Maintaining positive family communication benefits your family in many ways.
高二英语七选五困难题查看答案及解析
阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。
While driving, I sensed something wrong with my car. Pulling into the first parking lot I found, I stopped it and climbed out to assess the situation. My heart sank as I discovered that one of my rear（后面的）tires was flat.
I’d bought the secondhand car several months before, but it didn’t include a spare tire. Although I knew I needed to purchase one, my schedule was so tight that I hadn’t done it yet. Because I was working full-time in the emergency room at a local hospital and taking evening classes at a university fifty miles away.
Now here I was, alone forty miles from home. In those days, cell phones were a luxury. I had no way to call for assistance.
My spirits grew darker the minute I checked the place where I had pulled over. No one was around, except a rusty, red truck. It was getting dark. I had two options：stay in my car until morning or start walking in hopes of finding a convenience store with a pay phone. Neither option appealed to me.
I was about to grab my purse and set off on foot when a man came out from what seemed to be a law office. Pulling a set of keys from his pocket，he locked the office door，and then turned and saw me standing next to my car. I must have looked scared and confused as he headed straight toward me.
“Can 1 help you with anything?” he asked.
Judging from his appearance, I decided I could trust him.
“I have a flat tire but don’t have a spare,” I said, relieved to see him.
“I can help you remove the flat and then drive you to a tire shop to get it fixed,” he said.
I remembered the cautionary（告诫的）words my parents had drilled into my head：Never get in a car with a stranger.
“That’s okay,” I said. “Thanks anyway.”
高二英语读后续写中等难度题查看答案及解析
Just how much does the Constitution(宪法) protect your digital data? The Supreme Court will now consider whether police can search the contents of a mobile phone without a warrant (授权令) if the phone is on or around a person during an arrest.
California has asked the justices to restore the practice that the police may search through the contents of suspects’ smartphones at the time of their arrest. It is hard, the state says, for judges to assess the implications of new and rapidly changing technologies .
The justices would be careless if they followed California's advice. They should start by rejecting California’s weak argument that exploring the contents of a smart phone is similar to say, going through a suspect's wallet. The court has ruled that police don't offend against the Fourth Amendment(修正案) when they go through the wallet of an arrestee without a warrant. In fact, exploring one's smartphone is more like entering his or her home. A smartphone may contain an arrestee's reading history, financial history, medical history and comprehensive records of recent correspondence.
Americans should take steps to protect their own digital privacy and should avoid putting important information in smartphones. But keeping sensitive information on these devices is increasingly a requirement of normal life. Citizens still have a right to expect private documents to remain private and protected by the Constitution's prohibition on unreasonable searches.
In many cases, it would not be very difficult for authorities to obtain a warrant to search through phone contents. They could still trump(打出王牌) the Fourth Amendment protections when facing severe and dangerous circumstances, such as the threat of immediate harm, and they could take reasonable measures to ensure that phone data are not deleted or altered while a warrant is on the way. The justices, though, may want to allow room for police to cite situations where they are entitled to more flexibility.
But the justices should not swallow California's argument whole. New technology sometimes demands fresh applications of the Constitution's protections. Orin Kerr, a law professor, compares the explosion and accessibility of digital information in the 21st century with the establishment of automobile use as a digital necessity of life in the 20th. At that time, the justices had to explain new rules for the new personal domain(领域) of cars. Similarly, the justices must sort out how the Fourth Amendment of the Constitution applies to digital information now.
1.The author’s attitude toward California’s argument is _____________.
A.skeptical B.tolerant
C.indifferent D.disapproving
2.The author believes that exploring one's phone content is comparable to_____________.
A.getting into one's residence B.handing one's historical records
C.scanning one's correspondences D.going through one's wallet
3.In paragraph 4 and 5, the author shows his concern that_____________.
A.principles are hard to be clearly expressed
B.citizens' privacy is not effectively protected
C.phones are used to store sensitive information
D.the court is giving police less room for action
4.Orin Kerr's comparison is quoted to indicate that_____________.
A.the Constitution should be implemented flexibly
B.Principles of the Constitution should never be changed
C.New technology requires reinterpretation of the Constitution
D.California's argument violates principles of the Constitution
高二英语阅读选择中等难度题查看答案及解析