For many of us, a little time with our smartp...

For many of us, a little time with our smartphones or iPads before sleep is the highlight of the night. But would you still think it is relaxing if you knew that it damages or destroys your sleep? Scientists say that's exactly what it does.

In ancient times, when there were no lamps, telephones or smartphones, the sun was the main source of light. When the sun went down, our brains took that as a signal to start producing melatonin(褪黑素), a chemical that helps us sleep.

However, a healthy amount of melatonin can only be produced in complete darkness.Any light in your bedroom—even the one on the alarm clock or the charging indicator on your cellphone—could disturb the process, not to mention something as bright as smartphone and iPad screens. We tend to hold these much closer than a television or laptop, which allows them to shoot far more light straight into our eyes.

“This is particularly worrisome in populations such as young adults and adolescents, who already tend to be night_owls，” said researcher Brittany Wood at Rensselaer Polytechnic Institute.“Lack of sleep among teens is leading to depression, self­harm, low concentration and poor performance at school，” she added.

While all lights are the enemy of sleep, not all colors of light have the same effect. Our eyes are particularly sensitive to blue light, which is common during the day. Most of the light coming from electronic screens is blue light and it fools our brain into thinking it's still daytime. By contrast, orange or red light has less influence on melatonin production, because our brains recognize it as a signal that the day is ending, according to The Telegraph.

Asking yourself to keep your hands off your smartphone before bedtime might seem unreasonable, but you should at least remember to dim the screen or hold it farther away from your eyes. You could also wear a pair of orange sunglasses that take away the harmful blue light.

1.According to the passage, we can know ________.

A．it's a good habit to play with smartphones or iPads late into night

B．scientists suggest we should avoid using smartphones or iPads

C．darkness makes a great impact on the amount of melatonin

D．the sun was the only source of light in ancient times

the sun was the main source of light.”可知D项为错误结论。

2.Which of the following is TRUE according to the passage?

A．The darker it is, the more melatonin will be produced.

B．The lighter it is, the more melatonin will be produced.

C．The more melatonin you have, the worse you'll sleep.

D．The more electrical equipment you have, the more melatonin will be produced.

3.The underlined part in Paragraph 4 refers to those ________.

A．who are young adults or adolescents

B．who don't perform well in school

C．who are addicted to a television or laptop

D．who are short of sleep at night and perform poorly in daily life

4.In the writer's opinion, which is a correct suggestion?

A．You should go to bed when the sun goes down.

B．You should use an orange or red light electronic screen.

C．You should wear a pair of blue sunglasses when sleeping.

D．You should avoid blue light as possible as you can before bedtime.

高三英语阅读理解中等难度题查看答案及解析

For many of us, a little time with our smartphones or iPads before sleep is the highlight of the night. But would you still think it is relaxing if you knew that it damages or destroys your sleep? Scientists say that's exactly what it does.

In ancient times, when there were no lamps, telephones or smartphones, the sun was the main source of light. When the sun went down, our brains took that as a signal to start producing melatonin(褪黑素), a chemical that helps us sleep.

However, a healthy amount of melatonin can only be produced in complete darkness.Any light in your bedroom—even the one on the alarm clock or the charging indicator on your cellphone—could disturb the process, not to mention something as bright as smartphone and iPad screens. We tend to hold these much closer than a television or laptop, which allows them to shoot far more light straight into our eyes.

“This is particularly worrisome in populations such as young adults and adolescents, who already tend to be night_owls，” said researcher Brittany Wood at Rensselaer Polytechnic Institute.“Lack of sleep among teens is leading to depression, self­harm, low concentration and poor performance at school，” she added.

While all lights are the enemy of sleep, not all colors of light have the same effect. Our eyes are particularly sensitive to blue light, which is common during the day. Most of the light coming from electronic screens is blue light and it fools our brain into thinking it's still daytime. By contrast, orange or red light has less influence on melatonin production, because our brains recognize it as a signal that the day is ending, according to The Telegraph.

Asking yourself to keep your hands off your smartphone before bedtime might seem unreasonable, but you should at least remember to dim the screen or hold it farther away from your eyes. You could also wear a pair of orange sunglasses that take away the harmful blue light.

1.According to the passage, we can know ________.

A．it's a good habit to play with smartphones or iPads late into night

B．scientists suggest we should avoid using smartphones or iPads

C．darkness makes a great impact on the amount of melatonin

D．the sun was the only source of light in ancient times

2.Which of the following is TRUE according to the passage?

A．The darker it is, the more melatonin will be produced.

B．The lighter it is, the more melatonin will be produced.

C．The more melatonin you have, the worse you'll sleep.

D．The more electrical equipment you have, the more melatonin will be produced.

3.The underlined part in Paragraph 4 refers to those ________.

A．who are young adults or adolescents

B．who don't perform well in school

C．who are addicted to a television or laptop

D．who are short of sleep at night and perform poorly in daily life

4.In the writer's opinion, which is a correct suggestion?

A．You should go to bed when the sun goes down.

B．You should use an orange or red light electronic screen.

C．You should wear a pair of blue sunglasses when sleeping.

D．You should avoid blue light as possible as you can before bedtime.

高三英语阅读理解困难题查看答案及解析

Smartphones are our constant companions. For many of us, their glowing screens are a ubiquitous (十分普遍的) presence, drawing us in with endless distractions. They are in our hands as soon as we wake, and command our attention until the final moments before we fall asleep.

Steve Jobs would not approve.

In 2007, Jobs took the stage and introduced the world to the iPhone. If you watch the full speech, you will be surprised by how he imagined our relationship should be with this iconic invention. This vision is so different from the way most of us use these devices now.

In his remarks, Jobs spent an extended amount of time demonstrating how the device utilized (应用) the touch screen before detailing the many ways Apple engineers had improved the age-old process of making phone calls. It’s the best iPod we’ve ever made,” Jobs exclaimed at one point. “The killer app is making calls,” he later added. Both lines drew thunderous applause.

The presentation confirms that Jobs imagined a simpler iPhone experience than the one we actually have more than a decade later. For example, there was no App Store when the iPhone was first introduced, and this was by design. Jobs was convinced that the phone’s carefully-designed native features were enough. He did not seek to completely change the rhythm of users’ daily lives. He simply wanted to take experiences we had already found important－listening to music, placing calls, generating directions－and make them better.

The minimalist (简约主义者) vision for the iPhone Jobs offered in 2007 is unrecognizable today－and that is a shame.

Under what I call the “constant companion model,” we now see our smartphones as always-on portals (通道) to information. We have become so used to it over the past decade that it is easy to forget the novelty (新奇之处) of the device. It seems increasingly clear to me that Jobs probably got it right from the very beginning: Many of us would be better-off returning to his original minimalist vision for our phones.

Practically speaking, to be a minimalist smartphone user means only using your device for a small number of features that do things of value to you. Otherwise, you simply put it away outside of these activities. This approach dethrones (废黜) this device from the position of a constant companion down to a luxury object, such as a fancy bike, that gives you great pleasure when you use it but does not dominate your entire day.

Early in his 2007 keynote, Jobs said, “Today, Apple is going to reinvent the phone.” What he didn’t add, however, was the follow-up promise: “Tomorrow we’re going to reinvent your life.” The smartphone is fantastic, but it was never meant to be the foundation for a new form of existence.

If you return this innovation to its original role, you will get more out of both your phone and your life.

1.The underlined word “it” in the last but two paragraphs probably refers to 　　　　 .

A.information B.the smartphone

C.the always-on portal D.the constant companion model

2.According to Steve Jobs, what was the main selling point of Apple’s first iPhone?

A.It allowed the users to have access to the internet.

B.It was actually an iPod that could make phone calls.

C.It was installed with applications by third-party developers.

D.It could fulfill people’s desire to multitask in their daily lives.

3.According to the article, a minimalist smartphone user tends to　　　　 .

A.expect to reinvent his life with the device

B.buy the latest model of iPhone and see it as a luxury

C.remove all the unnecessary applications from the device

D.spend more time working than playing with his device

4.The author’s purpose in writing the article is to　　　　 .

A.tell readers why Steve Job created the iPhone

B.remind readers not to be addicted to their smartphones

C.show readers that smartphones can greatly change our lives

D.encourage readers to block internet access on their smartphones

高三英语阅读理解困难题查看答案及解析

Nowadays, many of us track our steps with smart watches, pedometers（计步器）or phone apps and are of course thrilled when we reach that all-important daily goal of 10,000 steps. You might _______ that this number has appeared after years of research.

The _______ number "10,000" dates back to a marketing campaign _______ shortly before the start of the1964 Tokyo Olympic Games. A company began_______a pedometer called the Manpo-kei: “man” meaning 10,000, “po” meaning_______and “kei”meaning meter. It was hugely _______ and the number seems to have stuck. Marty buyers are appealed by the new gadget.

Since then, studies have _______ the health benefits of 5,000 with 10,000 steps and, not

_______，the higher number is better. But until recently, all the _______ between hadn't been studied. I-Min Lee, a professor of ________ at Harvard Medical School, and her team ________a group of more than 16,000 women in their seventies. Each woman spent a week ________ a device to measure movement during ________ hours. When they ________ the women up an average of four years and three months later, 504 died. How many steps do you think the people alive had been doing? In fact, the average number for________ was only 5,500 but not 10,000. Women who took more than 4,000 steps a ________ were significantly more likely to still be alive than those who did only 2,700 steps. It's surprising that such a small ________could have consequences for longevity（寿命）．

However，physical conditions.________from person to person，and we should do it wisely. So count if you find it ________ you, but remember there's nothing special about 10,000 steps. Set the goal that is ________ for you.

1.A.assume B.admit C.acquire D.afford

2.A.strange B.ordinary C.abstract D.magic

3.A.recommended B.launched C.stated D.commanded

4.A.selling B.purchasing C.producing D.donating

5.A.walkers B.runners C.steps D.numbers

6.A.helpful B.successful C.plentiful D.powerful

7.A.known B.displayed C.compared D.shown

8.A.excitingly B.disappointingly C.amusingly D.surprisingly

9.A.signs B.strengths C.symbols D.numbers

10.A.science B.law C.medicine D.history

11.A.focused on B.took part in C.got along with D.thought highly of

12.A.taking B.wearing C.holding D.bringing

13.A.walking B.sleeping C.running D.shaking

14.A.asked B.spied C.found D.followed

15.A.women B.deaths C.survivors D.people

16.A.day B.hour C.month D.week

17.A.distance B.growth C.decrease D.difference

18.A.separate B.reflect C.vary D.come

19.A.distracts B.motivates C.pulls D.defeats

20.A.challenging B.appropriate C.beneficial D.creative

高三英语完形填空中等难度题查看答案及解析

Nowadays, many of us track our steps with smart watches, pedometers (计步器) or phone apps and are of course thrilled when we reach that all-important daily goal of 10,000 steps. You might_______that this number has appeared after years of research.

The_______number ''10,000'' dates back to a marketing campaign_______shortly before the start of the1964 Tokyo Olympic Games. A company began_______a pedometer called the Manpo-kei: ''man'' meaning 10,000, ''po'' meaning_______and ''kei'' meaning meter. It was hugely _______and the number seems to have stuck. Many buyers are appealed by the new device.

Since then, studies have_______the health benefits of 5,000 with 10,000 steps and, not _______，the higher number is better. But until recently, all the_______between hadn’t been studied. I-Min Lee, a professor of________at Harvard Medical School, and her team________a group of more than 16,000 women in their seventies. Each woman spent a week________a device to measure movement during________hours. When they________the women up an average of four years and three months later, 504 died. How many steps do you think the people alive had been doing? In fact, the average number for________was only 5,500 but not 10,000. Women who took more than 4,000 steps a________were significantly more likely to still be alive than those who did only 2,700 steps. It's surprising that such a small________could have consequences for longevity (寿命).

However, physical conditions________from person to person, and we should do it wisely. So count if you find it ________ you, but remember there’s nothing special about 10,000 steps. Set the goal that is________for you.

1.A.assume B.admit C.acquire D.afford

2.A.delicate B.ordinary C.abstract D.magic

3.A.recommended B.launched C.stated D.commanded

4.A.marketing B.purchasing C.manufacturing D.donating

5.A.walkers B.runners C.steps D.numbers

6.A.thoughtful B.successful C.plentiful D.powerful

7.A.identified B.displayed C.compared D.compromised

8.A.excitingly B.disappointingly C.amusingly D.surprisingly

9.A.signs B.strengths C.symbols D.numbers

10.A.psychology B.mathematics C.medicine D.philosophy

11.A.focused on B.took part in C.got along with D.thought highly of

12.A.associating B.wearing C.undertaking D.claiming

13.A.walking B.sleeping C.running D.shaking

14.A.remarked B.distinguished C.acquainted D.tracked

15.A.women B.deaths C.survivors D.people

16.A.day B.hour C.month D.week

17.A.distance B.growth C.decrease D.difference

18.A.separate B.reflect C.vary D.recover

19.A.distracts B.motivates C.indicates D.accumulates

20.A.challenging B.appropriate C.beneficial D.creative

高三英语完形填空困难题查看答案及解析

Many of us deal with the rush every morning in preparation for work or school, but it doesn't have to be this way. With a little time management, these steps can help you cut down on your morning stress.

Create an evening preparation routine.

1. These simple tasks will take you less than 30 minutes to complete each evening and will save you a huge headache every morning.

Get a good night's sleep.

Make sure you start winding down for bed at a reasonable hour to allow enough time for a healthy night's sleep. 2. If needed, set a bedtime reminder alarm on your alarm clock. Always keep the temperature in your bedroom comfortably cool.

3.

An extra 30 minutes in the morning will make a difference. As long as you go to bed on time, waking up 30 minutes earlier should seem natural after just a few days. Use this time to think, shower and eat breakfast.

Plan a realistic day.

Writing things down means you don't have to worry about forgetting to do them. 4. Write down anything that cannot be put off to the following day.

5.

Getting up to face a new day is far more satisfying when you have something to look forward to. Make sure you manage your time better so that you have time to do something you love on a daily basis.

A. Morning stress is very common.

B. Schedule something you love daily.

C. Never fill your mind with unnecessary worries.

D. Make a summary of what you did in the daytime.

E. Wake up 30 minutes earlier.

F. Iron your clothes, locate your keys, plan a nutritious breakfast, etc.

G. Most people require seven to eight hours' sleep each night.

高三英语七选五中等难度题查看答案及解析

请阅读下面短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

On an average day most of us check our smartphones 47 times, and this habit clouds our judgment on what information to select and store, which might explain why it’s time we should do things about the information we take in to form memories.

As simple as it sounds, the repetition of tasks-reading, or saying words over and over — continues to be the best method for transforming short-term memories into long-term ones. To do that, we have to retrain our minds to focus on one task at a time. Sadly, most turn a blind eye to this formula because we believe we’re productive. New connections are made in your brain when you learn, so to remember what you learn, do what you probably did in your youth: Repeat words, thoughts and ideas over and over until you get them right.

Also, spaced repetition might be the best way. Quickly pushing facts into our brains leads us to forget them in the long term. When you review knowledge and practice it often, it sticks, a research has shown. So if you can include what you’re trying to remember into daily life, ideally over time, your chances of keeping it significantly improve. But once you stop reviewing that knowledge, the retention (保留) drops greatly. To get past it, space out your repetition over a few days and test the effect yourself. But be careful: find a healthy interval that works. This is a good way to effectively start tackling a new language.

Sometimes, memory and focus usually go hand-in-hand. Dr. Cowan suggests rearranging our office setup as one way to improve focus. “The rebirth of the open workplace cannot be helping stay on task, ” Dr. Cowan said. Referring to work spaces without desks, physical barriers and privacy, but with a lot of playthings.

Multiple studies have found that procrastination (拖延) leads to stress and completely kills focus. Stop engaging in useless tasks like surfing the web and just handle whatever it is you need to work on. Then watch your focus increase quickly and your memory improve.

Memory is very cue (提示) dependent, “Mr. Schacter, a psychologist, said, referring to”. Something he calls absent-minded memory failure. “Most say it could never happen to me, but it’s a very long list of responsible people that it has happened to. When you don’t have that cue, you can forget almost everything.”

A simple way around that is to set reminders. Even better, combine a few of these techniques: Write your reminder on a post-it and put it on your desk so you’re forced to repeatedly look at it over a long period, including the practice of spaced repetition.

高三英语任务型阅读中等难度题查看答案及解析

Times are a little tough at our house right now. Neither of us makes a lot of money, but years of experience have taught us how to walk between the raindrops and make it from one month to the next with a fair amount of grace. I cook a lot at home, more when we're facing lean times. When I know that I have to keep us fed on not much money, I fall back on my grandmother's recipes. She taught me to cook.

When I was a kid, my twin brother and I spent long summer weeks and Christmas vacations with my mother's parents in the mountains of North Carolina. Rather than go hunting with my grandfather on frozen mornings, I found myself more and more in the kitchen with my grandmother, watching her making a lemon cheese pie with her soft hands.

My great-grandmother died when my grandmother was 11 years old. As the eldest daughter, she was expected to take on all of the housework while attending school. Throughout the Great Depression, she learned how to make a little food go a long way. Vegetables were cheap, so she cooked a lot of them, mostly only using small amounts of meat for seasoning. Roast beef was a twice-a-month luxury, but there was nothing she couldn't do with a chicken, every part of it. Nothing went to waste.

Now I understand that her food was sacred. I feel connected to my grandmother and to hundreds of years of family when I'm in my kitchen making country food. In the delicious smells is a long tale of victory over hard times, of conquering starvation—of not just surviving, but finding joy and pleasure in every meal of every day.

From grandmother I learned to take real satisfaction in feeding people. My grandmother would beam with pleasure over a heavily laden table and say, “Do you know what this would cost at the restaurant? ” I never knew what restaurant in particular she had in mind, but I knew that the question was totally not fair, because no restaurant anywhere can cook like a grandmother. But now, thanks to her guidance and years of practice, I can.

1.According to the passage, the author cooks a lot at home because__________.

A. she wants to try out her grandmother’s recipes

B. she and her husband are quite particular about food

C. she enjoys cooking at home

D. she and her husband are embarrassed financially

2.What does the underlined word “lean” mean in the first paragraph?

A. with a bad harvest　　 B. with little money

C. with little enengy　　 D. with little work

3.According to the passage, the author’s grandmother__________.

A. learnt to cook throughout the Great Depression

B. was careful in budgeting

C. preferred chicken to beef

D. was careful in cooking vegetables

4.Which of the following can be the best title of the passage?

A. Cook like My Grandmother　　 B. My Grandmother’s Sacred Food

C. My Grandmother’s Recipe　　 D. Joy and Pleasure in Cooking

高三英语阅读理解中等难度题查看答案及解析

Many of us have characteristics coming from our families. Maybe we have our father's eyes or grandmother's hair color. But there are still other elements of our personalities picked up by ___our parents, such as our mother's love of cleaning or our dad's __ of humor.

Researchers learn there are usually three kinds of people from their __.

The first kind of people are the job-oriented （以求职为目的的）who __ to regard a job as simply a way to make money. They __ to working day after day and don't think it interesting for them to do anything else. If you have a job-oriented father, you may __ work this way. However, you'll not __ hold the viewpoint if you grow up close to your job-oriented mother.

The second are the career-oriented who see their jobs as a place to gain ____ . They don't mind working overtime. In fact, some __ their jobs so much that they are feeling more

comfortable in the __ than at home. They are always __ of making progress in their work. Being close to a career-oriented father __ you'll carry on your father's. ___ enough, having a mother with this viewpoint seems to have little __ .

The third are the calling-oriented who consider their jobs as a way to have a __ effect on the world. They are more __ improving the world around them than __ a large salary. These people usually come from homes __ both parents have abilities. This __ that adolescents need the support of both parents in order to have the confidence.

The good news is --- we still have our_______ to find a career that suits us.

1.A.inviting B.nursing C.protecting D.modeling

2.A.scene B.sense C.right D.gift

3.A.study B.university C.academy D.classroom

4.A.attempt B.manage C.tend D.offer

5.A.are supposed B.are opposed C.look forward D.are linked

6.A.view B.think C.believe D.imagine

7.A.frequently B.constantly C.probably D.potentially

8.A.explanations B.expressions C.directions D.achievements

9.A.addict B.value C.devote D.contribute

10.A.club B.office C.cinema D.pub

11.A.sad B.curious C.proud D.afraid

12.A.equals B.means C.demands D.shows

13.A.Worriedly B.Surely C.Carefully D.Strangely

14.A.influence B.evidence C.justice D.performance

15.A.negative B.side C.bad D.positive

16.A.disappointed at B.concerned about C.puzzled at D.confused at

17.A.paying B.raising C.earning D.making

18.A.where B.whose C.which D.that

19.A.suggests B.insists C.recommends D.convinces

20.A.advice B.difference C.change D.choice

高三英语完形填空中等难度题查看答案及解析

Many of us know about Russia’s Lake Baikal from our textbooks, or by listening to Chinese singer Li Jian’s hit song, Lie Baikal. But over the past decade, the world’s deepest freshwater lake has been in the spotlight for an extreme sport.

Each March since 2005, about 150 people from around the world sign up for the Baikal Ice Marathon. They come to explore the lake’s breathtaking beauty and challenge themselves in unpredictable conditions. The 26-mile (41.84-kilometers) journey starts on the lake’s eastern shore. In March, the ice is a meter thick and iron-hard. Runners cross this frozen surface, finishing on the western side of the lake.

Known as the “blue eye of Siberia”, Lake Baikal has exceptionally clear waters. This means its ice is almost perfectly transparent (透明的). “Seen from above, a runner on the ice looks as if he or she were jogging through space.” The New York Times noted.

The landscape might be beautiful, but it’s also harsh. Strong winds blast (侵袭) across the lake and frostbite can occur within half an hour. Runners say the cold climate is what draws them. They want to test their limits.

“When you are in such an environment, you don’t have cars around you, and you don’t have the noise around. I think these extreme races allow you to be alone with nature.” Alicja Barahona, a 64-year-old runner from the US, told ABC news.

The location offers some strange and unique characteristics for this marathon. The finishing line is visible from the start, but the endless white offers no progress markers. The race also ends with little fanfare (隆重的欢迎). Tourists crowding the ice are mostly addicted to snapping selfies (自拍) and just ignore the runners.

For some runners, the absence of spectators makes the race more challenging, because it’s lonely. They must fight with themselves. “You are alone on Baikal. It is your race. You are alone with yourself. All you need to do is to defeat yourself.” Veronique Messina, a French runner, told the Telegraph.

1.What can we know about the Baikal Ice Marathon from the article?

A. It takes runners from the northern end to the southern end of the lake.

B. It involves extreme weather and beautiful scenery.

C. It attracts more and more participants each year.

D. It is about 26 kilometers in length.

2.How does the Baikal Ice Marathon differ from other marathons?

A. Only men are allowed to run in this race.

B. The runners are often distracted by tourists.

C. There are many progress markers on the ice.

D. The runners can see the finishing line from the start.

3.What is the most challenging part of the race for Messina?

A. The cold climate. B. The long distance.

C. Noisy surroundings. D. Loneliness.

4.How many reasons are listed to show the loneliness?

A. 5. B. 4.

C. 3. D. 2.

高三英语阅读理解中等难度题查看答案及解析