28．You___________use your cell phone here in ...

You_____ use your cell phone here in our hospital because of the disturbance to the electronic equipments! It’s forbidden．

A．shouldn’t    B．may not    C．needn’t   D．mustn’t

高三英语单项填空中等难度题查看答案及解析

28．You___________use your cell phone here in our hospital because of the disturbance to the electronic equipments! It’s forbidden．

高三英语单项填空简单题查看答案及解析

Here’s one number to keep in mind during your next cell phone conversation: 50. A new experiment shows that spending 50 minutes with an active phone pressed up to the ear increases activity in the brain. This brain activity probably doesn't make you smarter. When cell phones are on, they emit (发出) energy in the form of radiation that could be harmful, especially after years of cell phone usage. Scientists don't know yet whether cell phones are bad for the brain. Studies like this one are attempting to find it out.

The 47 participants in the experiment may have looked a little strange. Each one had two Samsung cell phones attached to his or her head — one on each ear. The phone on the left ear was off. The phone on the right ear played a message for 50 minutes, but the participants couldn't hear it because the sound was off.

With this set-up, the scientists could be sure they were studying brain activity from the phone itself, and not brain activity due to listening and talking during a conversation. After 50 minutes with two phones strapped to their heads, the participants were given PET scans.

The PET scan showed that the left side (the side with the phone turned off) of each participant's brain hadn't changed during the experiment. The right side of the brain, however, had used more glucose, which is a type of sugar that provides fuel to brain cells. These right-side brain cells were using almost as much glucose as the brain uses when a person is talking. This suggests that the brain cells there were active ― even without the person hearing anything. That activity, the scientists say, was probably caused by radiation from the phone.

Henry Lai, who works at the University of Washington in Seattle, is uncomfortable with the data related to cell phones. Holding a cell phone to your ear during a conversation is “not really safe,” Lai told Science News. Lai is a bioengineer at the University of Washington in Seattle. He wrote an article about the new study for a journal, but he did not work on the study. Bioengineers bring together ideas from engineering and biology.

For those who don't want to wait to find out for sure whether cell phones are bad for the brain, there are ways to talk more safely. You can have short and sweet conversations, use a speakerphone or keep the phone away from your head.

1. Which of the following statement is true?

A. Scientists are sure that cell phones are bad for the brain.

B. In the experiment, the left side of the brain used more glucose.

C. Radiation from the phone probably causes the change in the brain.

D. Henry Lai wrote a lot of articles about this new study.

2. Why weren’t the participants allowed to have a conversation on the phone during the experiment?

A. Because the scientists want to be sure of the accuracy of the experiment.

B. Because they really looked strange and no one wanted to talk to others.

C. Because they were given PET scans and they lost the ability to talk.

D. Because that would be too noisy and bad for the experiment.

3.What is glucose?

A. A type of sugar that provides vitamin to brain cells.

B. Something that the right side of the brain used.

C. A type of sugar that gives energy to brain cells.

D. Something that makes a human excited.

4. According to the last two paragraphs, which is the safest way to use a cell phone?

A. Holding the cell phone close to your head.

B. Using a cell phone more than three hours a day.

C. Taking the most powerful cell phone.

D. Keeping the cell phone at a distance.

5. Where is this article probably taken from?

A. Literature magazine.　　　　 B. Science News.

C. Story books.　　　　 　　　　 D. Art Journal.

高三英语阅读理解中等难度题查看答案及解析

一I wonder if I could use your cell phone.

—　　　 .　 It is on the desk next to you.

A. Help yourself　　 B.That's right

C.It's a pleasure　　 D. No way

高三英语单项填空中等难度题查看答案及解析

How do you kill your time when you go to work? Most of us stare at our cell phones, and refuse to make eye contact with others. We just read, chat with others online or play games online. Or maybe we’re using the time between stops to do our makeup, catch up on emails, or read a few chapters of a book. However, Dina Alfasi takes a very different approach.

Each day she has to travel hours on buses and trains to get to her engineering job at a hospital in Israel. Rather than look at her cell phone in silence, she uses one very special way to have connection with strangers. It is portraits of the people she meets on public transport every day that she is taking. The photographs catch those quiet and personal moments of people readying themselves for the day ahead. Some people lean (倚靠) their head against the window and go to sleep, some stare into space and have a daydream, and others sit quietly to read their documents or books. Each picture catches one tiny moment in people’s lives, ripe with potential for your imagination. It is wonderful for her to look at someone’s commute (上下班) and make up an entire story about the rest of their daily existence, from the father travelling with a baby to the woman welcoming a change.

“What inspires me very much are the little moments that happen every day,” Dina told My Modern Met. “My work is to tell stories through a single portrait, and it proves that all you need is just to look around and find those magic moments.”

1.What will most people do when going to work?

A.Enjoy reading a book loudly.

B.Make eye contact with others.

C.Have face-to-face talks with others.

D.Concentrate on their mobile phones.

2.What makes Dina different from others?

A.Staring into the space and having a daydream.

B.Leaning against the window and relaxing herself.

C.Using her mobile phone to appreciate pictures she draws.

D.Drawing people while travelling on buses and trains to work.

3.Which word can best describe Dina Alfasi?

A.Cool. B.Careful.

C.Generous. D.Considerate.

4.What is the main idea of the text?

A.Little moments make Dina special.

B.Cell phone is used to take special portraits.

C.Dina takes portraits of others when commuting.

D.People go to work with different ways to kill time.

高三英语阅读理解中等难度题查看答案及解析

Deleted Photos May Still Be on Your Phone

When you remove a photo from your cell phone, it may not be gone for good. That is great news if you accidentally delete an important photo. 1.

You may think when you tap the trashcan icon to delete a photo, that photo is no longer on your phone. But that may not be true. The photo may stay on your phone for a while to give you a chance to restore it.

So, it is important for you to know what happens to a photo when you send it to the trash.

When you tap the trash can icon on iPhone or iPad, you will see a confirmation.2. When you choose Delete, a notice tells you the photo will be deleted from all of your devices.

Your photo will disappear from view then and there.3. Instead, the image is sent to the Recently Deleted album in the Photos app where it remains for 30 days. During that time you can return a photo from the Recently Deleted album to your phone. You can also choose to delete it permanently.

To find the Recently Deleted album, open the Photos app. (hen tap Albums in the bottom menu. Swipe to find the Recently Deleted album. Tap on the Recently Deleted album to find the photos you have deleted within the past 30 days.4.

If you decide you want to keep a photo or delete it at that moment, tap Select in the upper right comer of the screen. Then tap the photo you want to keep or delete so a check mark appears. Tap Delete or Recover at the bottom of the screen to delete the photo or add it back into the app.

If you choose to delete a photo from the Recently Deleted album, you will be asked to confirm your choice. You will also be warned: “This photo will be deleted.5.”

A. The menu will appear.

B. But it is not truly gone.

C. This action cannot be undone.

D. It asks if you want to delete or cancel.

E. Choose photos you want to either delete or restore.

F. But it could be a big problem if a photo you wanted to delete is still on your phone.

G. On each photo will be a number representing the days left until the photo is deleted permanently.

高三英语七选五中等难度题查看答案及解析

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 occurrence 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 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.

1.According to Ms Davis, brain cancer increases ________.

A. in the teenagers　　　　 B. among old people

C. in the twenties　　　 　 D. among pregnant women

2.What does the underlined word “vulnerable” in the 4th paragraph probably mean?

A. accessible　　　　 B. changeable

C. passive　　 　　 　　 D. sensitive

3. The author’s purpose of writing the text is most likely to ________.

A. entertain 　　　　　　　　　 B. persuade

C. describe 　　　　　　　　　　 D. inform

4.Which of the following would be the best title for the passage?

A. Low-energy Radiation Leads to Cancer

B. Cell Phone Use Brings Health Problems

C. Radiation Damages DNA in People’s Brain

D. Researchers Launched Lab Studies on Cell Phones

高三英语阅读理解中等难度题查看答案及解析

D

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 manufacturers 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; Research In Motion, BlackBerry’s manufacturer, recommends 2.5 centimeters.

If health issues arise from cell phone use, the possible effects are huge. Voice calls - Americans chat on cell phones 2.26 trillion(万亿)minutes annually - earn $109 billion for the wireless carriers.

Devra Davis, an expert who has worked for the University of Pittsburgh, has published a book about cell phone radiation, “Disconnect.” The book surveys scientific research and concludes the question is not settled.

Brain cancer is a concern that Ms. Davis examines. 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-to-29 age group and a drop for the older population.

“Most cancers have multiple 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 only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid（易吸收的液体）. No studies have yet been completed on cell phone radiation and children, she says.

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 abdomen（腹部）.

1.Why is the warning in the small print?

A．They think people will not care about it.

B．There is not enough space for the warning.

C．They don’t want the users to pay attention to it.

D．The warning is not important at all.

2.What does the underlined word in sixth paragraph probably mean?

A．acceptable        B．valuable           C．accessible         D．easily affected

3.What can we conclude from the last paragraph?

A．Pregnant women should keep cell phones away.

B．People should use cell phones in the correct way.

C．If you are a child, you’d better text than make phone calls.

D．When you use a cell phone, use a wired headset or the phone’s speaker.

4.What does the passage mainly talk about?

A．Be careful when using cell phones.

B．Don’t hold your cell phone against your ear.

C．Rats exposed to radiation have damaged DNA in their brains.

D．Low-energy radiation could damage cells that could lead to cancer.

高三英语阅读理解中等难度题查看答案及解析

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 manufacturers 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; Research In Motion, BlackBerry’s manufacturer, recommends 2.5 centimeters.

If health issues arise from cell phone use, the possible effects are huge. Voice calls - Americans chat on cell phones 2.26 trillion(万亿)minutes annually - earn $109 billion for the wireless carriers.

Devra Davis, an expert who has worked for the University of Pittsburgh, has published a book about cell phone radiation, “Disconnect.” The book surveys scientific research and concludes the question is not settled.

Brain cancer is a concern that Ms. Davis examines. 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-to-29 age group and a drop for the older population.

“Most cancers have multiple 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（易受伤的）to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid（易吸收的液体）. No studies have yet been completed on cell phone radiation and children, she says.

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 abdomen（腹部）.

1.According to Ms Davis, brain cancer increase ____.

A．among children                         B．among old people

C．in the twenties                         D．among pregnant women

2.Why do children easily be affected by radiation?

A．Because they haven’t grown up.

B．Because they are too young to protect themselves.

C．Because they use cell phones more often than adults.

D．Because their skulls are thinner and their brains are easily hurt.

3.What can we conclude from the last paragraph?

A．Pregnant women should keep cell phones away.

B．People should use cell phones in the correct way.

C．If you are a child, you’d better text than make phone calls.

D．When you use a cell phone, use a wired headset or the phone’s speaker.

4.What does the passage mainly talk about?

A．Be careful when using cell phones.

B．Don’t hold your cell phone against your ear.

C．Rats exposed to radiation have damaged DNA in their brains.

D．Low-energy radiation could damage cells that could lead to cancer.

高三英语阅读理解中等难度题查看答案及解析

C

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 manufacturers 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; Research In Motion, BlackBerry’s manufacturer, recommends 2.5 centimeters.

If health issues arise from cell phone use, the possible effects are huge. Voice calls - Americans chat on cell phones 2.26 trillion(万亿)minutes annually - earn $109 billion for the wireless carriers.

Devra Davis, an expert who has worked for the University of Pittsburgh, has published a book about cell phone radiation, “Disconnect.” The book surveys scientific research and concludes the question is not settled.

Brain cancer is a concern that Ms. Davis examines. 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-to-29 age group and a drop for the older population.

“Most cancers have multiple 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 only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid（易吸收的液体）. No studies have yet been completed on cell phone radiation and children, she says.

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 abdomen（腹部）.

1.Why is the warning in the small print?

A．They think people will not care about it.

B．There is not enough space for the warning.

C．They don’t want the users to pay attention to it.

D．The warning is not important at all.

2. What does the underlined word in sixth paragraph probably mean?

A．acceptable        B．valuable           C．accessible         D．easily affected

3.What can we conclude from the last paragraph?

A．Pregnant women should keep cell phones away.

B．People should use cell phones in the correct way.

C．If you are a child, you’d better text than make phone calls.

D．When you use a cell phone, use a wired headset or the phone’s speaker.

4. What does the passage mainly talk about?

A．Be careful when using cell phones.

B．Don’t hold your cell phone against your ear.

C．Rats exposed to radiation have damaged DNA in their brains.

D．Low-energy radiation could damage cells that could lead to cancer.

高三英语阅读理解中等难度题查看答案及解析