If you're one of the millions of those who us...

If you're one of the millions of those who use escalators each year, you are probably deeply familiar with the vertical grooves（竖凹槽）that cover each stair. Few of us have stopped to consider why they exist, though. In fact, it's one of the everyday things we take for granted.

But it is a little complicating when you think about it. Sure, the deep, grey lines make an escalator's metal stairs more appealing to the eye. But regular stairs don't have grooves like these; why do escalators need them? Is it because of the movement?

It turns out those grooves serve a more functional purpose. And, yes, it does have to do with the movement, as well as with general cleanliness! Anyone who has ridden an escalator knows that the steps everlastingly circulate from the top to the bottom. You've surely noticed the ridged yellow lip at the top of the escalator. But here's what you may not have noticed: As an escalator's steps flatten, this ridge—also called the comb plate—sweeps away any trash or litter that might have fallen on the stairs. Those grooves lock the step and comb plate together, which makes it harder for any dangerous materials to slide underneath the lip. This prevents foreign objects from getting stuck in that gap, potentially causing the escalator to stop, or worse, break down completely.

That's not the only reason why the grooves were created, though. They are also a good place for water to pool together, protecting you from a bad fall on the slick surface.

So the next time you step on an escalator, take a moment to appreciate those metal grooves. They exist to make sure you get to your office meeting on time.

1.What are the first two paragraphs trying to say?

A.Millions of people use escalators every year.

B.Few people think much about the grooves.

C.Escalators are complicated machines.

D.Grooves make the stairs look better.

2.The ridge is mainly designed to____

A.clean off dangerous objects.

B. keep the stairs in movement.

C.flatten the steps.

D.lock the steps.

3.What does the underlined word "slick” mean in Paragraph 4?

A.Smooth. B.Sticky.

C.Steep. D.Slippery.

4.What's the passage mainly about?

A.The importance of escalators.

B.The reasons for grooves on stairs.

C.The look of grooves in escalators.

D.The safe ways of riding escalators.

高三英语阅读理解困难题查看答案及解析

If you're not one of the record 1. 9 million British holiday makers who went on a cruise (海上航游) last year, isn't it high time you walked up the gangway?

We've rounded up all of the best packages you need to know about, as well as picking out some of our top favourite late deals.

US Transatlantic From £629 per-person: Sail 13 nights with stops including Boston, New York. Price is on a full-board basis and includes accommodation as well as on board entertainment and activities. Based on an interior cabin(船舱) but upgrade to Ocean View for an extra £ 177per-person.

Cuba from £400 per-person: Sail five nights on board Majesty of the Seas with stops in Havana» Cuba and Mexico. Price is on a full-board basis and includes accommodation as well as onboard entertainment and activities.

Portugal, Spain and Italy from £479 per-person：Sail seven nights with stops including Madeira, and Malaga on a full-board basis. Price includes meals, afternoon tea, late-night snacks, luxury en-suite accommodation, all onboard activities and entertainment.

European cities from £579 per-person: Sail on board MSC Meraviglia from Barcelona to visit Marseille, Genoa, Civitavecchia, Palermo and Valetta, and make the most of MSC's all-inclusive drinks package including coffees, cocktails, wine, beer, spirits and soft drinks for over 18s. Price is on a cruise only basis with two people sharing a cabin.

While there are plenty of great late deals available to customers, the cruise industry often has some of its best deals months in advance. Going forward, cruise lines are looking to change the way the booking system works so the prices go up closer to the departure.

1.Who is the passage written for?

A.sailor. B.A holiday designer.

C.An advertiser. D.A potential tourist.

2.How much should a couple pay for US Transatlantic Ocean View cabin?

A.£1612. B.£1258.

C.£806. D.£629.

3.Whose price doesn't include entertainment?

A.Cuba. B.Portugal, Spain and Italy.

C.European cities. D.US Transatlantic.

高三英语阅读理解中等难度题查看答案及解析

If you're one of the millions of Americans now trapped in home because of the COVID-19，it might feel like you're cooking more than you've ever cooked in your entire life. And maybe you' re planning to reduce your home food wastes. A good way of dealing with them is to learn to make compost (堆肥).

Select your food wastes. Start with fruits and vegetables — the skin of a sweet potato，the top of your strawberry. Also tea bags, coffee grounds, old flowers and even eggshells are good raw materials. Store these food wastes in a container so you can add them bit by bit. The container doesn't have to be bought online. It can just be an old milk carton (纸箱) or an old wooden chest —just work with what you have available. Also, you can store the food wastes in a bag in your freezer or fridge. That's an easy way to avoid odors and insects in your kitchen.

The crucial step is to make the compost mix. In the world of composting you're inevitably going to hear about ''the greens and browns''—the two main elements for your mix. ''Greens'' are typically wet food wastes, like fruit and vegetable peelings. They are a crucial part for the growth of organisms (微生物),''Browns" are typically dry and they are more carbon rich like newspapers, dried leaves，and pine needles. A good thing to remember is when you're layering， put the dry browns on the bottom with the wet greens on the top because they allow water and air to flow. That will make sure organisms can do their job.

How long do you have to wait for the compost breakdown? If it's hot, you could get there in two months pretty easy. If it's cold, you could be there in six months, And for every component to break down, it might be a year.

In the end ''your nose knows'' when the compost is ready. It just smells so woody, earthy, sweet or sometimes sour. The smell can tell how well you work at your compost.

1.What is a good solution to your home food wastes?

A.Make a plan and reduce the wastes.

B.Collect the picked wastes to make compost.

C.Select the wastes and bury them into the earth.

D.Pick the wastes and put them in a bag in your fridge.

2.What plays a crucial role in making the compost mix?

A.Wet ''greens''

B.Dry "browns''

C.Carbon rich materials.

D.Wet ''greens'' and dry ''browns''.

3.Why should the ''browns'' be put on the bottom with the ''greens'' on the top?

A.To help the organism work on the compost efficiently.

B.To save more space for the water and air to flow.

C.To allow the water and air to flow into the container.

D.To make sure the organism can live longer and better.

4.What does the author feel about making compost?

A.Pretty easy and fun.

B.Complex and time killing.

C.Demanding patience but worthwhile.

D.Calling for hard work but enjoyable.

高三英语阅读理解中等难度题查看答案及解析

任务型阅读

The hottest apps

IF you’re one of those people who likes to take a look at their phone from time to time, you’re not alone. Using apps has now become part of everyday life. But with so many on the market that claim to be the best, which ones should you download onto your phone to have fun with? Below, four have been picked out for you.

Evernote

In the world of note taking, Evernote is the king. It allows users to create electronic files such as text, photos, audio, and videos. It also lets you organize your files, tag (标记) them, and search them easily.

One of the most useful features on the app, though, is being able to log onto any device with your Evernote account and use your files. The app automatically stores your content in the cloud storage, and syncs (同步) it with your other devices.

Another feature that is new in the latest version of the Evernote app is “Places”, which allows you to sort the files, photos, audio or video you have created by the location where you created them.

So if you need some organization in your life, Evernote is the app for you.

Candy Crush Soda Saga

The original Candy Crush Saga took the world by storm, leaving millions addicted to its endless candy-popping levels.

But now there is a new challenge: Candy Crush Soda Saga. The app is similar to the original, but different enough to draw you in with a few new features. The app is still a match-3 game, which means that you have to move a piece of candy until there are three matching ones.

There are a few new features, though, such as soda bottles, which burst into purple liquid when you match three of them. There are also hidden gummy (粘性的) bears in this new version, and to complete the levels, you must clear the candies to reveal the hidden bear. These new features make the game a little harder than the old version, and you can expect to spend more time on each level.

So if you liked the original Candy Crush game, Candy Crush Soda Saga will be a new treat with much of the same fun as before.

Moment Cam

Moment Cam brings you some of the most useful and wanted features a camera app can have, such as adjusting the flash, sequence shots (连拍), adjusting the timer, and selecting different-sized frames for photo sharing sites. But what sets the app apart from all the others is the selection of simple, minimal buttons that you hardly notice are there.

The best thing about the app is not what it does, but what it leaves out. For once this app is not full of too many confusing and useless features. Instead, it is simple, clean, and easy to use. If you love taking photos on your phone, Moment Cam might be just what you never knew you were looking for.

Lychee FM

You may have listened to a lot of radio programs. Do you now dream of making your own? With Lychee FM, you no longer need expensive hardware and complex software to do just that. You can record your shows and finish editing them within the app. Then you can upload your program to all the listeners on Lychee FM or share it through your social networks.

Apart from making your own programs, you can also listen to more than 15,000 stations through Lychee FM. One such popular show is called nühanzi, meaning “tough girls”. It discusses how women can handle just about everything. There are also shows on many other topics like sports, comedy, and music. The hosts include famous people such as music producer Gao Xiaosong, and many other creative people.

The hottest apps

高三英语填空题中等难度题查看答案及解析

The English-language version of Wikipedia has almost six million articles. And if you’re a cheating student, that’s six million essays already written for you. But plagiarism isn’t really an effective way—just type the text into a search engine and the game is over. Then what about having a ghostwriter compose your final essay?

“Standard plagiarism software cannot detect this kind of cheating.” said Stephan Lorenzen, a data analyst at the University of Copenhagen. In Denmark, where he’s based, ghostwriting is a growing problem at high schools. So Lorenzen and his colleagues created a program called Ghostwriter that can detect the cheats.

At its central part is a neural network trained and tested on 130,000 real essays from 10,000 Danish students. After reading through tens of thousands of essays labeled as being written by the same author or not, the machine taught itself to possess the characteristics that might spot cheating. For example, did a student’s essays share the same styles of punctuation? The same spelling mistakes?

By examining inconsistencies like those, Ghostwriter was able to seek out a cheated essay nearly 90 percent of the time. The team presented the results at the European Meeting on Artificial Neural Networks, Computational Intelligence and Machine Learning. There’s one more aspect here that could help students. Your high school essays probably get better over time as you learn to write and the machine can detect that. The final idea is to detect students who are at risk because their development in writing style isn’t as you would expect. Teachers could thus give extra help to kids who really need it, while sniffing out the cheaters too.

1.When a student wants to cheat in writing an essay, ________.

A.his cheating may be detected in a certain way

B.essays offered by Wikipedia can’t be downloaded

C.he won’t hire a ghostwriter to write one for himself

D.ghostwriting can be detected by standard plagiarism software

2.Which aspect of the program “Ghostwriter” is talked about in Paragraph 3?

A.Its components. B.Its weaknesses.

C.Its influences. D.Its working theory.

3.Which one of the following is the function of “Ghostwriter”?

A.It never fails to find out a cheated essay. B.It can detect a student’s progress in writing.

C.It can help a student to correct his pronunciation. D.It can give extra help instead of teachers.

4.Where is the text most likely from?

A.A guidebook. B.A magazine.

C.A novel. D.A diary.

高三英语阅读理解中等难度题查看答案及解析

Planning to go to a gym? If you are one of those who have spent many days planning to join a gym or to attend it regularly, then why not choose some home exercise? Here are some home exercises without equipment.

Jumping jacks

This one is the best home workout without weights which is a great exercise that will work your hands and legs. Perform this exercise by standing with your feet placed together and arms at your sides. Now tuck in your abs(收腹) and jump by bending in your knees. At the same time, move your feet apart as much as you can and raise your hands to bring in line with your shoulder. While you come back you must be in a starting position, feet together, hands at sides and knees bent. You must land on your heels and again jump.

Jogging

Jogging is one of the best home exercises without weights. You don’t need to have a lawn or jogging track at home to perform this exercise. There are many benefits of jogging. It will work your entire legs. Moreover, it is a classic cardiovascular(心血管) workout. Make sure you wear jogging footwear even if you are jogging at home to avoid any stress on your feet. Also, you can gradually increase the jogging time and speed.

Rotating(旋转) exercise

Start by rotating your wrists, clockwise(顺时针地) and anticlockwise. Now, alternately rotate your feet in the same fashion. Now place both your hands on the shoulder and start rotating your shoulder clockwise and anticlockwise. Place an exercise mat and lie flat on your back. Now lift your left leg and rotate it clockwise; do not bend you knees. Now rest the left leg, lift your right leg and rotate it anticlockwise.

It is necessary to set a perfect mood for exercise which will help you stick to the exercise routine and excitement. Make sure you wear proper exercise clothes to perform the workout with ease. Also, putting on your favorite music will make your exercise session more lively. If you get bored with exercises, just dance, after all it’s also one of the best home exercises.

1.To carry out jumping jacks effectively, you________.

A. need to keep your two feet apart at first.

B. must stand straight first and bend your abs.

C. must use your arms to support your body.

D. need to use your heels to touch the ground.

2.What can we learn from Paragraph 3?

A. You may exercise your body entirely by jogging at home.

B. It may do harm to your feet to jog at home without shoes.

C. You’d better choose a space as the jogging track at home.

D. You must stick to a fixed time and speed while jogging.

3.What is the right order of your body parts during rotation exercise?

A. hands—legs---back----legs.

B. wrists—hands---feet---shoulders

C. wrists---feet---shoulders---legs

D. hands---shoulders---knees---legs

4.To carry out home exercises continuously, you need________.

A. a good atmosphere.　　　　　　　 B. a good coach.

C. a dance teacher　　　　　　　　　 D. a good timer.

高三英语阅读理解中等难度题查看答案及解析

Planning to go to a gym? If you are one of those who spent many days planning to join a gym or to attend it regularly, then why not choose some home exercise? Here are some home exercises without equipment.

Jumping jacks

This one is the best home workout without weights which is a great exercise that will work your hands and legs. Perform this exercise by standing with your feet placed together and arms at your sides. Now tuck in your abs(收腹) and jump by bending in your knees. At the same time, move your feet apart as much as you can and raise your hands to bring in line with your shoulder. While you come back you must be in a starting position, feet together, hands at sides and knees bent. You must land on your heels and again jump.

Jogging

Jogging is one of the best home exercises without weights. You don’t need to have a lawn or jogging track at home to perform this exercise. There are many benefits of jogging. It will work your entire legs. Moreover, it is a classic cardiovascular(心血管) workout. Make sure you wear jogging footwear even if you are jogging at home to avoid any stress on your feet. Also, you can gradually increase the jogging time and speed.

Rotating(旋转) exercise

Start by rotating your wrists, clockwise(顺时针地) and anticlockwise. Now, alternately rotate your feet in the same fashion. Now place both your hands on the shoulder and start rotating your shoulder clockwise and anticlockwise. Place an exercise mat and lie flat on your back. Now lift your left leg and rotate it clockwise; do not bend your knees. Now rest the left leg, lift your right leg and rotate it anticlockwise.

It is necessary to set a perfect mood for exercise which will help you stick to the exercise routine and excitement. Make sure you wear proper exercise clothes to perform the workout with ease. Also, putting on your favorite music will make your exercise session more lively. If you get bored with exercises, just dance, after all it’s also one of the best home exercises.

1.To carry out jumping jacks effectively, you ________.

A. need to keep your two feet apart at first

B. must stand straight first and bend your abs

C. must use your arms to support your body

D. need to use your heels to touch the ground

2.What can we learn from Paragraph 3?

A. You may exercise your body entirely by jogging at home.

B. It may do harm to your feet to jog at home without shoes.

C. You’d better choose a space as the jogging track at home.

D. You must stick to a fixed time and speed while jogging.

3.What is the right order of your body parts during rotation exercise?

A. hands—legs---back----legs.

B. wrists—hands---feet---shoulders.

C. wrists---feet---shoulders---legs.

D. hands---shoulders---knees---legs.

4.To carry out home exercises continuously, you need ________.

A. a good atmosphere                B. a good coach

C. a dance teacher                    D. a good timer

高三英语阅读理解中等难度题查看答案及解析

If boy wizard Harry Potter uses his magic to capture (迷住) the hearts of millions of teenagers, high school students Gabriella and Troy have charmed American boys and girls with their stories of campus life.

They are the leading characters in High School Musical, a series of hugely successful films in the US. The sequel (续集), High School Musical 3, came out on October 24 and has topped the American box office for two straight weeks.

The show has everything attractive to teenagers — dancing, catchy music, puppy love and good looks. The story starts when high school basketball star Troy and brainy Gabriella — two teenagers who are worlds apart — meet during the winter break. At a karaoke contest they discover their love for singing and an interest in each other. When school starts, Troy finds out that Gabriella is the new girl at his school.

Eager to find the magic they had during karaoke, Troy and Gabriella decide to audition (试镜) for the school’s upcoming musical. This angers the school’s drama queen Sharpay. However, they overcome difficulties and become the leading actors.

But the story doesn’t end there. High School Musical 2 follows their adventures over summer vacation when Sharpay tires to break up Troy and Gabriella. In the latest sequel, high-school seniors are facing the possibilities of being separated from each other as they go off in different directions when graduating from high school.

Joined by the rest of their friends, Troy and Gabriella stage a musical reflecting their experiences, hopes and fears about the future.

“The success of the High School Musical films shows Disney’s long-term efforts to attract youngsters for whom Mickey Mouse seems to babyish,” wrote New York Times reporter Dave Itzkoff. “For the time being, the movie has made fictional high school students as recognizable as that 79-year-old mouse.”

1.What is the passage mainly about?

A. Boy wizard — Harry Potter.

B. High school students Gabriella and Troy.

C. A successful show — High School Musical.

D. Disney’s long-term efforts.

2.How many films are there in this series of films?

A. 2.　　　　 B. 3.　　　　 C. 4.　　　　 D. 5.

3.What can you learn from the words “two teenagers who are worlds apart”?

A. They live far away from each other.

B. They used to know each other well.

C. They have a big difference between each other.

D. They study at different schools.

4.What happens in High School Musical 2, according to the passage?

A. Troy and Gabriella audition for a school musical.

B. Troy and Gabriella meet at a karaoke contest.

C. Troy and Gabriella graduate from high school.

D. Sharpay tries to break up Troy and Gabriella.

5.What does New York Times reporter Dave Itzkoff mean?

A. High School Musical is possibly more attractive to youngsters.

B. The high school students don’t like Mickey Mouse.

C. Mickey Mouse is more attractive to youngsters.

D. Mickey Mouse is too old to be recognized by youngsters.

高三英语阅读理解中等难度题查看答案及解析

If boy wizard Harry Potter uses his magic to capture (迷住) the hearts of millions of teenagers, high school students Gabriella and Troy have charmed American boys and girls with their stories of campus life.

They are the leading characters in High School Musical, a series of hugely successful films in the US. The sequel (续集), High School Musical 3, came out on October 24 and has topped the American box office for two straight weeks.

The show has everything attractive to teenagers — dancing, catchy music, puppy love and good looks. The story starts when high school basketball star Troy and brainy Gabriella — two teenagers who are worlds apart — meet during the winter break. At a karaoke contest they discover their love for singing and an interest in each other. When school starts, Troy finds out that Gabriella is the new girl at his school.

Eager to find the magic they had during karaoke, Troy and Gabriella decide to audition (试镜) for the school’s upcoming musical. This angers the school’s drama queen Sharpay. However, they overcome difficulties and become the leading actors.

But the story doesn’t end there. High School Musical 2 follows their adventures over summer vacation when Sharpay tires to break up Troy and Gabriella. In the latest sequel, high-school seniors are facing the possibilities of being separated from each other as they go off in different directions when graduating from high school.

Joined by the rest of their friends, Troy and Gabriella stage a musical reflecting their experiences, hopes and fears about the future.

“The success of the High School Musical films shows Disney’s long-term efforts to attract youngsters for whom Mickey Mouse seems to babyish,” wrote New York Times reporter Dave Itzkoff. “For the time being, the movie has made fictional high school students as recognizable as that 79-year-old mouse.”

1.What is the passage mainly about?

A. Boy wizard — Harry Potter.

B. High school students Gabriella and Troy.

C. A successful show — High School Musical.

D. Disney’s long-term efforts.

2.How many films are there in this series of films?

A. 2.　　　　 B. 3.　　　　 C. 4.　　　　 D. 5.

3.What can you learn from the words “two teenagers who are worlds apart”?

A. They live far away from each other.

B. They used to know each other well.

C. They have a big difference between each other.

D. They study at different schools.

4.What happens in High School Musical 2, according to the passage?

A. Troy and Gabriella audition for a school musical.

B. Troy and Gabriella meet at a karaoke contest.

C. Troy and Gabriella graduate from high school.

D. Sharpay tries to break up Troy and Gabriella.

5.What does New York Times reporter Dave Itzkoff mean?

A. High School Musical is possibly more attractive to youngsters.

B. The high school students don’t like Mickey Mouse.

C. Mickey Mouse is more attractive to youngsters.

D. Mickey Mouse is too old to be recognized by youngsters.

高三英语阅读理解中等难度题查看答案及解析

If boy wizard Harry Potter uses his magic to capture (迷住) the hearts of millions of teenagers, high school students Gabriella and Troy have charmed American boys and girls with their stories of campus life.

They are the leading characters in High School Musical, a series of hugely successful films in the US. The sequel (续集), High School Musical 3, came out on October 24 and has topped the American box office for two straight weeks.

The show has everything attractive to teenagers — dancing, catchy music, puppy love and good looks. The story starts when high school basketball star Troy and brainy Gabriella — two teenagers who are worlds apart — meet during the winter break. At a karaoke contest they discover their love for singing and an interest in each other. When school starts, Troy finds out that Gabriella is the new girl at his school.

Eager to find the magic they had during karaoke, Troy and Gabriella decide to audition (试镜) for the school’s upcoming musical. This angers the school’s drama queen Sharpay. However, they overcome difficulties and become the leading actors.

But the story doesn’t end there. High School Musical 2 follows their adventures over summer vacation when Sharpay tires to break up Troy and Gabriella. In the latest sequel, high-school seniors are facing the possibilities of being separated from each other as they go off in different directions when graduating from high school.

Joined by the rest of their friends, Troy and Gabriella stage a musical reflecting their experiences, hopes and fears about the future.

“The success of the High School Musical films shows Disney’s long-term efforts to attract youngsters for whom Mickey Mouse seems to babyish,” wrote New York Times reporter Dave Itzkoff. “For the time being, the movie has made fictional high school students as recognizable as that 79-year-old mouse.”

1.What is the passage mainly about?

A. Boy wizard — Harry Potter.

B. High school students Gabriella and Troy.

C. A successful show — High School Musical.

D. Disney’s long-term efforts.

2.How many films are there in this series of films?

A. 2.　　　　 B. 3.　　　　 C. 4.　　　　 D. 5.

3.What can you learn from the words “two teenagers who are worlds apart”?

A. They live far away from each other.

B. They used to know each other well.

C. They have a big difference between each other.

D. They study at different schools.

4.What happens in High School Musical 2, according to the passage?

A. Troy and Gabriella audition for a school musical.

B. Troy and Gabriella meet at a karaoke contest.

C. Troy and Gabriella graduate from high school.

D. Sharpay tries to break up Troy and Gabriella.

5.What does New York Times reporter Dave Itzkoff mean?

A. High School Musical is possibly more attractive to youngsters.

B. The high school students don’t like Mickey Mouse.

C. Mickey Mouse is more attractive to youngsters.

D. Mickey Mouse is too old to be recognized by youngsters.

高三英语阅读理解中等难度题查看答案及解析