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
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
Here are some tips on how to keep you，your belongings and your money safe during traveling. After all，it'd be a shame to spend all that time finding the best price for your trip，only to lose your cash and credit cards to a thief.
Don't let others know that you are new here.
You're a tourist. You know that，but you don't want anybody else to know that. Don't unfold your big map on a busy corner. Don't ask strangers on the street for directions. Learn your route ahead of time，and step into a business for directions whenever possible. Avoid flashing your Lonely Planet guidebook around，or publicly referring to your language dictionary when traveling abroad.
Keep your friends close and your money closer.
A lone traveler equals easy pickings for a seasoned criminal. If you are traveling alone，try to hide that fact. Stick with groups whenever possible and keep information sharing with chatty cab drivers and the like to a minimum.
Another thing you don't want to advertise：where you keep your money. A fanny pack(腰包) may be convenient，but it means “I'm not from around here！” If you have a purse，keep it close to your body，preferably under an item of clothing like a jacket or a sweater so that thieves can't steal it. Be sure that your wallet is in a securely fastened pocket. Or go like 007 with a hidden money belt. How cool is that?
Be careful，even in your hotel room.
Never blindly answer a knock at your door. If the knocker identifies himself as a hotel employee，call the front desk to confirm. Always make sure your hotel door completely closes when entering or exiting.
Don't leave your valuables lying around when you leave for the day. That hotel safe is there for a reason!
1.Why shouldn't tourists wear a fanny pack?
A．Because it shows that you are not a person around here.
B．Because it is not convenient.
C．Because it can't be hidden under your jacket.
D．Because it can't hide money.
2.Why does the author mention 007's money belt?
A．To persuade readers to learn from 007.
B．To persuade readers to buy the belt worn by 007.
C．To persuade tourists to hide money in their belt.
D．To persuade tourists not to show others where you keep your money.
3.Who is this passage written for?
A．Locals. B．Tourists. C．Hotel owners. D．Thieves.
4.Which of the following is TRUE according to the passage?
A. When traveling abroad, you shouldn't open your language dictionary in public areas.
B. Try your best to travel alone.
C. If you hear a knock at your hotel door，go to open it.
D. You can leave your money at the hotel when traveling.
高三英语阅读理解中等难度题查看答案及解析
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．
| A．shouldn’t | B．may not | C．needn’t | D．mustn’t |
高三英语单项填空简单题查看答案及解析
It's tough to see or hear of a friend in crisis. One idea to keep in mind is that it is healthy for the distressed person to feel what he or she feels in the moment. When a person in crisis feels understood, he or she feels less alone and connected to the person who understands.
A person who experiences empathy(同理心)from a friend who can “go there”for a few minutes in order to authentically understand while still maintaining a strong and supportive attitude may be relieving and healing. While a friend is telling you about the circumstance, the first and most important step is to listen for feelings, not ways to solve the problem.
For example, a friend is terribly upset because her husband is threatening to leave her. After fully honoring the feelings, it is important to ask the friend what would help. Maybe it is a good cry and some ice cream. Perhaps it's a glass of wine and a walk. Everyone has different ways of dealing. Be respectful and ask the friend what she needs or wants, not what you prescribe.
Take a second example, say a close friend is being misrepresented by other friends. The friends are gossiping about her. During a conversation with her, listen for feelings. Honor her hurt and shock. The same equation is useful with a partner.
Helping a friend or partner in crisis not only helps the person, but creates closeness and trust in the relationship, making opening up in the probable future. In addition, the person who is empathizing feels positive because he or she was able to help. When a person is truly able to comfort and reassure a loved one, he or she feels vital and useful, strengthening the relationship.
1.What should we do first when we know a friend is in crisis？
A.Keep away from him/her.
B.Buy him/her a glass of wine.
C.Understand how he/she feels.
D.Show him/her ways to solve the problem.
2.What does the underlined word “it” in paragraph 3 refer to？
A.A way to solve the crisis. B.A way to relieve a bad mood.
C.A way to listen for feelings. D.A way to honor the feelings.
3.How does the author prove his/her idea？
A.By listing data. B.By quoting sayings.
C.By giving examples. D.By conducting surveys.
4.What does the text mainly talk about？
A.How to keep a loved one. B.How to make new friends.
C.How to work with your partner. D.How to help a friend in trouble.
高三英语阅读理解中等难度题查看答案及解析
Clothes can make phone calls, play music, dial your pal’s number, keep you warm during cold weather and operate your computer?
This is not a fantasy. A British company, called Electrotextiles, has created a wide range of clothes — clothes that have minds of their own! Scientists, working for the company, have invented a kind of fabric that can be blended(混合) with flexible electronic materials to create intelligent clothing. The result are electronic garments.
If you think the wearer has to be wired to different devices, think again. These designer clothes are wire-free, soft to touch and washable!! Like any electronic device, these high-tech clothes have to be powered. Currently, a tiny nine-volt battery serves the purpose. But the researchers hope that in the near future the clothes will generate electricity by using body heat. These clothes are 100 percent shock proof, they say.
The Electrotextiles team has also created the world’s first cloth keyboard. This keyboard can be sewn into your trousers or skirt. To use this device, you will have to sit down and tap on your lap! These ‘lap- tap’ gadgets(器具) are all set to take over laptop computers!
Another useful garment is the shirt-cum-mobile phone. This handy invention enables drivers to chat comfortably with others at the wheel! Other popular electronic wear include the denim(牛仔布) jacket with flexible earphones sewn into the hood(风帽) and the electronic ski jacket with a built-in heater. The ski jacket is also programmed to send signals to a satellite. This technology is known as global positioning system and can be used to track lost skiers and wandering kids.
Having completed the cloth keyboard, scientists have already started to work on a new project—a necktie that can be used as a computer mouse. What is the next? Do you have any idea?
1.. The electronic garments are similar to other electronic devices in that ______.
| A．they feel smooth and soft |
| B．they use electricity as power |
| C．they can be washed in water |
| D．they are made from flexible materials |
2.. How will researchers improve these high-tech clothes?
| A．Body heat will be used as power. |
| B．The wearer will not get shocked. |
| C．A tiny nine-volt battery will work. |
| D．They will get charged automatically. |
3. What does the underlined phrase “This handy invention” in Paragraph 5 refer to?
| A．The laptop computer. | B．The electronic ski jacket. |
| C．The shirt-cum-mobile phone. | D．The world’s first cloth keyboard. |
4.. If you are going on a ski adventure, which device do you need?
| A．The cloth keyboard. | B．The electronic ski jacket. |
| C．The necktie to be used as a mouse. | D．The denim jacket with earphones. |
5.. The main purpose of the text is ______.
| A．to advertise for an English company | B．to predict the future trend of science |
| C．to show how rapidly science develops | D．to introduce some intelligent clothing |
高三英语阅读理解中等难度题查看答案及解析
Clothes can make phone calls, play music, dial your pal’s number, keep you warm during cold weather and operate your computer?
This is not a fantasy. A British company, called Electrotextiles, has created a wide range of clothes—clothes that have minds of their own! Scientists, working for the company, have invented a kind of fabric that can be blended(混合) with flexible electronic materials to create intelligent clothing. The result are electronic garments.
If you think the wearer has to be wired to different devices, think again. These designer clothes are wire-free, soft to touch and washable! Like any electronic device, these high-tech clothes have to be powered. Currently, a tiny nine-volt battery serves the purpose. But the researchers hope that in the near future the clothes will generate electricity by using body heat. These clothes are 100 percent shock proof, they say.
The Electrotextiles team has also created the world’s first cloth keyboard. This keyboard can be sewn into your trousers or skirt. To use this device, you will have to sit down and tap on your lap! These ‘lap-tap’ gadgets(器具) are all set to take over laptop computers!
Another useful garment is the shirt-cum-mobile phone. This handy invention enables drivers to chat comfortably with others at the wheel! Other popular electronic wear include the denim(牛仔布) jacket with flexible earphones sewn into the hood(风帽) and the electronic ski jacket with a built-in heater. The ski jacket is also programmed to send signals to a satellite. This technology is known as global positioning system and can be used to track lost skiers and wandering kids.
Having completed the cloth keyboard, scientists have already started to work on a new project—a necktie that can be used as a computer mouse. What is the next? Do you have any idea?
1.The electronic garments are similar to other electronic devices in that _________.
A. they feel smooth and soft B. they use electricity as power
C. they can be washed in water D. they are made from flexible materials
2.How will researchers improve these high-tech clothes?
A. Body heat will be used as power. B. The wearer will not get shocked.
C. A tiny nine-volt battery will work. D. They will get charged automatically.
3.What does the underlined phrase “This handy invention” in Paragraph 5 refer to?
A. The laptop computer. B. The electronic ski jacket.
C. The shirt-cure-mobile phone. D. The world’s first cloth keyboard.
4.If you are going on a ski adventure, which device do you need?
A. The cloth keyboard. B. The electronic ski jacket.
C. The necktie to be used as a mouse. D. The denim jacket with earphones.
5.The main purpose of the text is _________.
A. to advertise for an English company B. to predict the future trend of science
C. to show how rapidly science develops D. to introduce some intelligent clothing
高三英语阅读理解中等难度题查看答案及解析
Keeping Safe in your House During a Fire
Though you may not think you’ll ever fall victim to a house fire, it’s better to be prepared to avoid panicking. To increase your chances of survival, just follow these steps.
1. React as soon as you hear your smoke alarm goes off. On hearing your smoke detector or alarm going off and seeing a fire, exit your home as safely as possible. 1.
2. Safely exit through doors. If you don’t see smoke at the door, open it slowly and pass through it after making sure the door feels cool. If there is a fire preventing you from exiting the room, close the door.
3. Protect yourself from smoke inhalation（吸入）. Get low to the floor and crouch or crawl on your hands and knees to avoid the smoke. 2. Cover your nose and mouth if you have to walk by or through a heavily smoke-filled room.
4. 3. If your clothes catch fire, immediately stop what you’re doing, drop flat to the ground, and roll around until you put the fire out.
5. Prevent the smoke if you can’t get out. 4. Close your door and cover all vents（通风口）and cracks（缝隙）around it with cloth or tape to keep the smoke out.
6. Call for help from a second story window. 5. You can take a sheet or something else—white preferably—and hang it out of the window to signify that you need help when the first res-ponders get there.
A. If you can’t escape your home, don’t panic.
B. Stop, drop, and roll if your clothes catch fire.
C. You are probably a lot safer by closing doors.
D. Escape from a second story window if you can.
E. Smoke inhalation causes people to become unconscious.
F. Do not try to get your phone, valuables, or your other important possessions.
G. If you are trapped in your second story room, get to an area where people can find you.
高三英语七选五中等难度题查看答案及解析
Keeping Safe in Your House During a Fire
Thought you may not think you’ll ever fall victim to a house fire, it’s better to be prepared to avoid panicking. To increase your chances of survival, just follow these steps.
(1)React as soon as you hear your smoke alarm go off. On hearing your smoke detector or alarm going off and seeing a fire, exit your home as safely as possible. 1.
(2)Safely exit through doors. If you don’t see smoke at the door, open it slowly and pass through it after making sure the door feels cool. If there is a fire preventing you from exiting the room, close the door.
(3)Protect yourself from smoke inhalation(吸入). Get low to the floor and crouch or crawl on your hands and knees to avoid the smoke. 2. Cover your nose and mouth if you have to walk by or through a heavily smoke-filled room.
(4) 3. If your clothes catch fire, immediately stop what you’re doing, drop flat to the ground, and roll around until you put the fire out.
(5)Prevent the smoke if you can’t get out. 4. Close your door and cover all vents(通风口)and cracks(缝隙)around it with cloth or tape to keep the smoke out.
(6) Call for help from a second story window. 5. You can take a sheet or something else---white preferably---and hang it out the window to signify that you needed help when the first responders get there.
A. If you are trapped in your second story room, get to an area where people can find you.
B. Do not try to get your phone, valuables, or your other important possessions.
C. Smoke inhalation causes people to become unconscious.
D. Escape from a second story window if you can.
E. You are probably a lot safer by closing doors.
F. Stop, drop, and roll if your clothes catch fire.
G. If you can’t escape your home, don’t panic.
高三英语七选五中等难度题查看答案及解析
Always ________ in mind that your main task is to get this company running smoothly.
A.to keep B.to have kept
C.keep D.have kept
高三英语单项填空中等难度题查看答案及解析