Every animal sleeps, but the reason for this ...

Every animal sleeps, but the reason for this has remained foggy. When lab rats are not allowed to sleep, they die within a month. 1.

One idea is that sleep helps us strengthen new memories. 2. We　 know that, while awake, fresh memories are recorded by reinforcing (加强) connections between brain cells, but the memory processes that take place while we sleep have been unclear.

Support is growing for a theory that sleep evolved so that connections between neurons(神经元) in the brain can be weakened overnight, making room for fresh memories to form the next day.　 3.

Now we have the most direct evidence yet that he is right. 4.The synapses in the mice taken at the end of a period of sleep were 18 per cent smaller than those taken before sleep, showing that the connections between neurons weaken while sleeping.

If Tononi’s theory is right, it would explain why, when we miss a night’s, we find it harder the next day to concentrate and learn new information — our brains may have smaller room for new experiences.

Their research also suggests how we may build lasting memories over time even though the synapses become thinner. The team discovered that some synapses seem to be protected and stayed the same size. 5. “You keep what matters,” Tononi says.

A. We should also try to sleep well the night before.

B. It’s as if the brain is preserving its most important memories.

C. Similarly, when people go for a few days without sleeping, they get sick.

D. The processes take place to stop our brains becoming loaded with memories.

E. That’s why students do better in tests if they get a chance to sleep after learning.

F. “Sleep is the price we pay for learning,” says Giulio Tononi, who developed the idea.

G. Tononi’s team measured the size of these connections, or synapses, in the brains of 12 mice.

高二英语七选五困难题查看答案及解析

Every animal sleeps, but the reason for this has remained foggy. When lab rats are not allowed to sleep, they die within a month. 1.

One idea is that sleep helps us strengthen new memories. 2. We　 know that, while awake, fresh memories are recorded by reinforcing (加强) connections between brain cells, but the memory processes that take place while we sleep have been unclear.

Support is growing for a theory that sleep evolved so that connections between neurons(神经元) in the brain can be weakened overnight, making room for fresh memories to form the next day.　 3.

Now we have the most direct evidence yet that he is right. 4.The synapses in the mice taken at the end of a period of sleep were 18 per cent smaller than those taken before sleep, showing that the connections between neurons weaken while sleeping.

If Tononi’s theory is right, it would explain why, when we miss a night’s, we find it harder the next day to concentrate and learn new information — our brains may have smaller room for new experiences.

Their research also suggests how we may build lasting memories over time even though the synapses become thinner. The team discovered that some synapses seem to be protected and stayed the same size. 5. “You keep what matters,” Tononi says.

A. We should also try to sleep well the night before.

B. It’s as if the brain is preserving its most important memories.

C. Similarly, when people go for a few days without sleeping, they get sick.

D. The processes take place to stop our brains becoming loaded with memories.

E. That’s why students do better in tests if they get a chance to sleep after learning.

F. “Sleep is the price we pay for learning,” says Giulio Tononi, who developed the idea.

G. Tononi’s team measured the size of these connections, or synapses, in the brains of 12 mice.

高二英语七选五困难题查看答案及解析

Two lawyers were told not to leave the building but no reason for this _____ was given.

A. convenience       B .instruction     C. explanation       D. construction

高二英语单项填空中等难度题查看答案及解析

---You seem used to sleeping in the street.

---Oh, no. ______, I hate it, but I have nowhere to go for shelter.

A．On the other hand                      B．On the contrary

C．It depends                             D．Generally speaking

高二英语单项填空中等难度题查看答案及解析

It has been a dream for 30 years but now the world’s first flying car is set to hit the roads this year.

Ever since the “Back to the Future” movies lit up our screens in the 1980s，designers have dreamt of cars that could take to the sky at the push of a button．And now pilots can order their own “roadable” plane for just £ 127,000.

The plane, which has fold-out wings that span(翼展)17.5ft，has a range of flying distance of 460 miles and can be up to 115 mph．Back on the land，it can also travel at“highway speeds”in car mode(模式)．

Fueling the 19ft. long plane couldn’t be simpler----you just drive it into a petrol station and fill it up．

A spokeswoman said, “You can keep you ‘light-sport airplane’ in your garage.But because it needs a short runway to take to the air, you will have to drive to your local airport，fly up to 460 miles, land，and drive directly to your destination．You will always be ready to drive or fly．"

The spokeswoman added,“Never let bad weather change your trip.You call simply divert(改道)and continue on the ground until the weather clears.”　　

There is no risk to you—This is only the chance for you to be the first at your home field to unfold your wings and fly into the future．

1.According to the text, the“roadable”plane________.

A. can fly at“highway speeds”in car mode　　

B. is 19ft long and 17.5ft wide inside

C. is a kind of car with fold-out wings

D. can only travel on the highway

2.We can infer that in the“Back to the Future”movies_________. ‘’

A. cars can fly in the sky

B. pilots have no cars to drive

C. pilots can’t afford a“roadable”plane

D. there are some skillful pilots　

3.The last sentence of the text aims to__________．

A. ask people to unfold their wings and fly into the future

B. show people the use of the“roadable”plane

C. tell people only the“roadable”plane can fly in the future

D. call on people to buy the“roadable”plane

4.If you meet with a thunderstorm in your“roadable”plane in the skies，you can ________ ．

A. land in a nearby airport until it clears

B. 1and and drive on the ground

C. turn back home until it clears

D. fly high up to 460 miles

高二英语阅读理解中等难度题查看答案及解析

This may be sad to hear, but the number of Britain’s famous red telephone boxes has been falling for decades. The phone box is iconic (标志性的) to foreign fans of Britain and visitors to the country. There are still many left to enjoy, however.

There is deep feeling for the bright red iron-and-glass boxes with the Queen’s coat of arms. The places that still have the red box are mostly small and in the countryside. In these places, the phone box may be a symbol of community, as well as a landmark.

But there are still several cities, including London, that still have original red phone boxes in place.

For tourists, they probably make the perfect background for a selfie (自拍照). Visit London any day in the summer and you’ll see people with their smart phones taking photos with the red box behind them. People who receive the photo will have no trouble guessing where the selfie was taken.

Ever since mobile phones became more widespread, there has been less and less point in public phones. But although the red boxes are no longer popular places to make a call from, new uses are being found for them all the time. The famous design created by Giles Gilbert Scott back in 1924 lives on, but in ways the British architect would never have imagined.

Some of the new ways the phone boxes are being used are quite unusual. For example, some have been changed into tiny coffee shops. Others are hat stores. In one remote area of the country, a red box that had not been used for a long time has been turned into a small lending library.

Even back in their heyday in the last century, phone boxes were put to other uses. Some people even used them as toilets in an emergency.

But for many, they were a safe place to hide if you were caught up in the rain. Britain’s weather is unpredictable: sun one moment, heavy rain the next. So if you are planning to visit the UK and want the perfect British selfie, standing inside a red telephone box in a rainstorm may be your best bet.

1.According to the author, the red phone boxes in Britain are special because 　　　　 .

A. they can be put into different kinds of use

B. they are only found in the British countryside

C. they hold great meaning to some British communities

D. they have a deep connection with the royal family

2.We can learn from the article that British red phone boxes 　　　　 .

A. are mostly made of wood and glass

B. first appeared in big cities such as London

C. were designed by a British architect in the 1930s

D. are not used much for phone calls these days

3.The underlined word “heyday” in the second to last paragraph probably means 　　　　 .

A. a popular time　　 B. a bad time

C. an unusual time　　 D. a happy time

4.The purpose of the last paragraph is to 　　　　 .

A. explain how to deal with Britain’s changeable weather

B. describe a common way of making use of a red phone box in the UK

C. advise visitors to take a selfie standing inside a red telephone box

D. show how to use a red phone box in the case of an emergency

高二英语阅读理解中等难度题查看答案及解析

The phrase “Love is Blind” has been used by men and women alike for ages. But what does this ____ mean? Well, look at the sentence first, "Love is blind because my mother ____ loving me before seeing my face."

Now, let’s come to the point. Love is blind means, when you are in love, your emotions can ____ things in your brain to let you see things ____ as they are. The positive interpretation(解释) could be, a person is deeply in love with somebody, that they are ready to ____ their each and every mistake. They can't see any ____ or flaws(缺陷) in their lover, because they are ____　 by their love for them. The negative ____ could be, their partner is mistreating, ____, or lying to them, but they are ____ in love with them that they are ready to forgive their partner. ____ there is a clear difference between loving a person and ____ their terrible behaviors. If the ____ is the case, you should let go of that person.

All in all, we love from our ____, not through our eyes or ears. The interpretation of this saying has both, a negative and ____ meaning associated with it. It means that you love ____　 without thinking of logic(逻辑). You don't ____ their looks, and all that ____ is their heart.　　 ____ love is not being with somebody because of their good ____ or their wealth.

1.A. word　　 B. love　　 C. saying　　 D. article

2.A. started　　 B. enjoyed　　 C. remembered　　 D. forgot

3.A. put　　 B. cloud　　 C. place　　 D. avoid

4.A. closely　　 B. clearly　　 C. exactly　　 D. deeply

5.A. find　　 B. correct　　 C. value　　 D. ignore

6.A. advantage　　 B. strength　　 C. problem　　 D. disability

7.A. troubled　　 B. surrounded　　 C. blinded　　 D. misunderstood

8.A. explanation　　 B. result　　 C. side　　 D. effect

9.A. cheating　　 B. talking　　 C. laughing　　 D. sharing

10.A. also　　 B. still　　 C. so　　 D. even

11.A. But　　 B. And　　 C. If　　 D. Once

12.A. accepting　　 B. welcoming　　 C. solving　　 D. changing

13.A. former　　 B. latter　　 C. situation　　 D. truth

14.A. mouse　　 B. mind　　 C. heart　　 D. nose

15.A. active　　 B. different　　 C. bad　　 D. positive

16.A. anyone　　 B. somebody　　 C. nobody　　 D. none

17.A. care for　　 B. care about　　 C. think for　　 D. think about

18.A. matters　　 B. makes　　 C. needs　　 D. takes

19.A. First　　 B. Deep　　 C. Great　　 D. True

20.A. family　　 B. health　　 C. riches　　 D. look

高二英语完形填空困难题查看答案及解析

Whether the buildings in this area should be pulled down has remained ____；people are still looking for other possible solutions.

A. unchallenged　　 B. relevant

C. controversial　　 D. contradictory

高二英语单项填空中等难度题查看答案及解析

It’s after 10 a.m. and the kids are still sleeping. It’s Sunday. This is a traditional day of 　 .

Every culture on the planet has 　 　　　　　　 one day of rest a week.　 Some use that time to go church, 　 others sleep, watch TV, and just give themselves the gift of a 　　 day. And there are those who that working up a sweat in the backyard is just what the doctor ordered, but I that exact activity.

We need to give ourselves a break, and a little rest 　　　　　　 well for almost everybody. It doesn’t 　　　　 matter what the activity is. The idea is to give your body, mind, and heart a(n) 　 to relax. If you keep going at full speed every day, it can be really 　 on you, both physically and mentally.

Some people 　 it hard to take a real vacation, let alone a day off. I have seen many people work themselves an early grave because they were too 　 , and some too scared to give themselves a break.

It doesn’t matter what 　 your free time takes. You 　 yourself the gift of a deep breath and a view of the long sunset. Remember that you can’t work well if you’re exhausted (精疲力竭) by 　 stopping to take a rest. Again, it doesn’t matter 　 you do it. This is not about tradition. Find out whatever time works best for you, and 　 a plan.

　　 this and talk it over with others. The idea here is that by giving ourselves a break and just 　　 a day off, we can make our lives better and actually create greater things in our world.

1.A. rest    B. work    C. travel    D. exercise

2.A. at most    B. at least     C. more than    D. no more than

3.A. though    B. since    C. unless    D. while

4.A. busy    B. tired    C. lazy    D. terrible

5.A. feel    B. suggest    C. insist    D. dream

6.A. oppose    B. favour     C. doubt    D. refuse

7.A. sells    B. goes    C. works     D. manages

8.A. regularly

9.A. chance    B. equallyB. measure    C. finallyC. step    D. reallyD. answer

10.A. good    B. meaningful    C. helpful    D. hard

11.A. think    B. find    C. consider    D. put

12.A. at    B. on    C. with    D. into

13.A. taken    B. allowed    C. driven    D. expected

14.A. advice    B. form    C. gift    D. tradition

15.A. bring    B. show    C. owe    D. choose

16.A. never    B. ever    C. always    D. seldom

17.A. where    B. how    C. why    D. when

18.A. accept    B. agree    C. make    D. announce

19.A. Think about    B. Talk about    C. Bring about    D. Come about

20.A. asking    B. enjoying    C. sharing    D. spending

高二英语完形填空中等难度题查看答案及解析

---Jack, this is the third time that you have been late this week.

---Sorry, sir, but I was ______ for 15 minutes on the way here in the traffic jam.

A. held up　　 B. put up

C. taken up　　 D. given up

高二英语单项填空中等难度题查看答案及解析