While staring out of the window during a flight, not everyone will think carefully about the question why airplanes have rounded windows rather than square ones .
Over the years, aerospace engineering has made huge steps in airplane technology, meaning planes can carry more passengers and go faster. The planes have also changed shape to increase safety—including the windows. As commercial air travel took off in the mid -20th century, airline companies began to fly at higher altitudes to lower their cost—the air density (密度) is lower up there, creating less drag (阻力) for airplanes. However, higher altitudes came with problems, like the fact human beings can’t really survive at 30,000 feet. To make that possible, the cabin was changed to a cylindrical (圆柱体) shape to support the pressure inside. But at first, plane builders left in the standard square windows and this expansion meant disaster. The de Havilland Comet came into fashion in the 1950s. With a closed cabin, it was able to go higher and faster than other aircraft .
However, where there’s a comer, there’s a weak spot. Windows, having four comers, have four potential weak spots, making them likely to crash under stress— such as air pressure. By curving the window, the stress that would eventually break the window comer is distributed and the chance of it breaking is reduced. Rounded shapes are also stronger and resist deformation (变形), and can thus survive the extreme differences in pressure between the inside and outside of the aircraft .
Fortunately, designers figured out the lack of design pretty quick . Now we have nice, rounded airplane windows that can resist the pressure of traveling altitude. It gives being able to gaze out of your window to the world from 35,000 feet a whole new outlook, doesn’t it?
1.Why did airlines aim to fly at higher altitudes?
A.To save money for less drag.
B.To help the plane to take off.
C.To increase safety of the plane .
D.To carry more passengers and go faster.
2.What does the underlined words “de Havilland Comet” in Paragraph 2 refer to?
A.An aircraft. B.A band.
C.A planet D.A design.
3.Which is the advantage of the rounded window?
A.It increases the air pressure.
B.It weakens the strength of air pressure.
C.It reduces the possibility of breaking up.
D.It helps to survive the extreme weather.
高二英语阅读理解中等难度题
While staring out of the window during a flight, not everyone will think carefully about the question why airplanes have rounded windows rather than square ones .
Over the years, aerospace engineering has made huge steps in airplane technology, meaning planes can carry more passengers and go faster. The planes have also changed shape to increase safety—including the windows. As commercial air travel took off in the mid -20th century, airline companies began to fly at higher altitudes to lower their cost—the air density (密度) is lower up there, creating less drag (阻力) for airplanes. However, higher altitudes came with problems, like the fact human beings can’t really survive at 30,000 feet. To make that possible, the cabin was changed to a cylindrical (圆柱体) shape to support the pressure inside. But at first, plane builders left in the standard square windows and this expansion meant disaster. The de Havilland Comet came into fashion in the 1950s. With a closed cabin, it was able to go higher and faster than other aircraft .
However, where there’s a comer, there’s a weak spot. Windows, having four comers, have four potential weak spots, making them likely to crash under stress— such as air pressure. By curving the window, the stress that would eventually break the window comer is distributed and the chance of it breaking is reduced. Rounded shapes are also stronger and resist deformation (变形), and can thus survive the extreme differences in pressure between the inside and outside of the aircraft .
Fortunately, designers figured out the lack of design pretty quick . Now we have nice, rounded airplane windows that can resist the pressure of traveling altitude. It gives being able to gaze out of your window to the world from 35,000 feet a whole new outlook, doesn’t it?
1.Why did airlines aim to fly at higher altitudes?
A.To save money for less drag.
B.To help the plane to take off.
C.To increase safety of the plane .
D.To carry more passengers and go faster.
2.What does the underlined words “de Havilland Comet” in Paragraph 2 refer to?
A.An aircraft. B.A band.
C.A planet D.A design.
3.Which is the advantage of the rounded window?
A.It increases the air pressure.
B.It weakens the strength of air pressure.
C.It reduces the possibility of breaking up.
D.It helps to survive the extreme weather.
高二英语阅读理解中等难度题查看答案及解析
While I was looking out of the window, I saw an old homeless man crossing the street, carrying a suitcase.
Many times I looked on far away, feeling 36for the homeless, but did nothing. I did 37 some money to homeless people when I walked by, but never really interacted (互动) with them.
Though we 38 doing something, yet we push it into the deep corners of our heart because we’re too busy, too 39 , or too afraid of strangers.
Today I did what I 40 thought I could. I walked out and ran after the old man. When I 41 him, I asked him if I could buy him 42 . He looked surprised, but accepted it 43 , warning me that he had a good appetite！
I was 44 and excited at the same time. We went to a45 nearby. I told the waiter to give him whatever he wanted and I would 46it.
I sat down for a moment asking the old man where he47 . He told me he was sleeping behind the court house 48 it was warm there. I promised to give him a few jackets to keep him warm. To my surprise, he49some inexpensive jewelry on the table and chose a glass necklace for me, 50 someone else had given it to him.
I told him I bought him lunch not to get something 51 . But he insisted on my having it.
When it was time to go back to work, I 52for not being able to stay with him and promised to sit down with him for lunch next time and 53 more.
1. A．worried B．sorry C．grateful D．proud
2. A．throw B．pay C．give D．lend
3. A．think of B．complain of C．hear of D．remind of
4. A．lazy B．proud C．poor D．shy
5. A．once B．never C．always D．even
6. A．reached B．caught C．arrived D．got
7. A．milk B．clothes C．lunch D．newspaper
8. A．easily B．angrily C．anxiously D．happily
9. A．terrified B．nervous C．frightened D．amused
10. A．restaurant B．cinema C．store D．station
11. A．prepare for B．wait for C．pay for D．call for
12. A．went B．belonged C．worked D．lived
13. A．unless B．because C．until D．but
14. A．put B．covered C．took D．bought
15. A．crying B．shouting C．saying D．whispering
16. A．in need B．in return C．in exchange D．in sight
17. A．admitted B．allowed C．advised D．apologized
18. A．chat B．play C．drink D．eat
19. A．everything B．nothing C．anything D．something
20. A．honest B．cool C．patient D．kind
高二英语完型填空中等难度题查看答案及解析
______ not to miss the flight at 15:20, the manager set out for the airport in a hurry.
A. Reminding B. Reminded C. To remind D. Having reminded
高二英语单项填空中等难度题查看答案及解析
_______ not to miss the flight at 15:20, the manager set out for the airport in a hurry.
A．Having reminded B．Reminded C．To remind D．Reminding
高二英语单项填空中等难度题查看答案及解析
As I sat there one night in Namibia, staring out at one of the most perfect sunsets I’d seen in a while, I realized why I never wanted to visit Africa alone. Sometimes the _____ of travel is not so beautiful when you don’t have someone to _____ it with. And there I was, staring out at this gorgeous _____ , and I was alone. I had no one to share that moment.
Sure, there was my tour group, but it’s not the same. Sharing a moment with people you have a bond with is much _____ from sharing it with strangers. Days later, I kept coming back to the _____ I felt at that moment. There was nothing wrong______ anyone on my tour-----they were all nice, polite, and talkative, and we got along well. But tours are _____ organized, and sometimes you closely _____ with people and sometimes you don’t. Dining alone may well be one most awkward times of solo travel. But like anything, the more you do it the more you get used to it.
And as I sat there looking at this beautiful sunset while zebra _____ from the nearby watering hole, a ___ hit me at the moment-----I am alone .And I am _____ it. While I’m an introvert(内向的人)and I like my “me” time, after 6.5 years, solo travel isn’t for me any longer. I no longer _____ to wander cities or gaze upon African sunsets alone. I want to _____ with people I know. I want_____ faces. I want to share moments. I make plenty of _____ on the road, but I’m tired of having to ______ in each new city.
I think everyone should travel alone at some point in their life; you _____ a lot about yourself by doing so. I never ____the solo travel I’ve done in the past and never felt alone or bored during those years, but Africa made it ______ that it’s time to move on to a new _____ of my life. I couldn’t hold onto the past any longer.
1.A. route B. beauty C. destination D. plan
2.A. share B. compare C. award D. admire
3.A. grassland B. sky C. desert D. sunset
4.A. different B. helpful C. unusual D. admirable
5.A. doubt B. sadness C. wonder D. comfort
6.A. for B. in C. with D. on
7.A. expensively B. commonly C. meaningfully D. casually
8.A. play B. compete C. bond D. fight
9.A. drank B. lay C. bent D. ate
10.A. stone B. truth C. stick D. ball
11.A. fond of B. proud of C. afraid of D. tired of
12.A. desire B. fail C. dare D. refuse
13.A. communicate B. work C. travel D. deal
14.A. round B. familiar C. healthy D. similar
15.A. friends B. mistakes C. decisions D. plans
16.A. take over B. look over C. turn over D. start over
17.A. learn B. worry C. care D. concern
18.A. recall B. dream C. regret D. experience
19.A. clear B. valuable C. impressive D. basic
20.A. situation B. discovery C. challenge D. chapter
高二英语完形填空困难题查看答案及解析
All the survivors of the flight disaster are out of danger and being well ____to in the hospital.
A attended B referred C brought D pointed
高二英语单项填空简单题查看答案及解析
Still Good
Having grown up during the Depression （经济大萧条时期），Dad was not one to throw anything out，certainly not_____something was "still good" and his grey coat was one．
One cold evening，a man my father _____ called "Old Joe" passed our house．He was wearing _____boots with the soles （鞋底） flapping as he walked in the snow．Dad called out，"Wait，Joe，wait﹣I have some boots for you．"
And then…I really shouldn't have been _____when Dad took off his warm coat and handed it to Old Joe，too． I was_____of admiration for my dad．
Every time I saw Old Joe wearing that grey coat，my heart would fill with _____．
My father _____many years later，but I would see Old Joe _____wearing his coat when I went to visit Mom and that always made me _____． It brought back such warm _____of my dad， and who he was as a person， and how he _____his life．
Then，one winter evening I was leaving Mom's house and keeping a（n） _____out for Joe as usual．Well， _____ for the coat， really．I hadn't seen Joe for a while， _____ I was happy when I saw that old grey coat _____．Feeling a sudden burst of warmth，I strained to see Joe's face， not _____him to look up． Suddenly he did!
But it wasn't Old Joe's face．I smiled， _____ that my dad's old coat had once again found a new _____，in a new owner．I was _____with emotion as I thought about how _____ Dad would be to know，that even after all these years，his old coat was "still good．"
1.A. though B. if C. unless D. until
2.A. affectionately B. unwillingly C. considerately D. cautiously
3.A. plain B. expensive C. shabby D. cozy
4.A. confused B. ashamed C. depressed D. surprised
5.A. aware B. guilty C. jealous D. full
6.A. warmth B. pity C. concern D. satisfaction
7.A. set out B. passed away C. cheered up D. broke away
8.A. never B. already C. still D. only
9.A. complain B. sigh C. suffer D. smile
10.A. inspiration B. appreciation C. memories D. comforts
11.A. lived B. challenged C. saved D. lost
12.A. look B. eye C. greeting D. track
13.A. less B. better C. worse D. more
14.A. for B. but C. so D. or
15.A. disappearing B. coming C. lying D. falling
16.A. expecting B. advocating C. convincing D. reminding
17.A. forgetting B. imagining C. doubting D. realizing
18.A. approach B. experience C. aim D. life
19.A. combined B. satisfied C. overcome D. concerned
20.A. happy B. anxious C. curious D. polite
高二英语完形填空困难题查看答案及解析
Paul looked out of the window of the classroom and sighed. The driveway was still ________ and it was getting dark. His father had said that he would ________ him up by 5:30, but it was almost 7:29 and Paul hadn’t heard a word from him. Paul ________ to do some of his reading homework. ________, he couldn’t help thinking of his father. He knew that his father had a job and a ________ life, but he couldn’t understand why he was always breaking his ________.
The next day at school, Paul didn’t ________ his math homework. Paul’s teacher noticed his unusually ________ performance and asked him why, but Paul didn’t want to ________ him. He knew that if he started talking a flood of ________ would pour out. He just wanted to be alone with his ________ anyway, so he just sat in the classroom _________, not even looking at his teacher. “Well, Paul, you can’t have this thing ________ you up. The sooner you get it off your ________, the sooner you can heal.”
As Paul walked home from school, he ________ the things that his teacher had told him. Paul knew that he hadn’t been himself recently. Maybe he stopped doing his work ________ he was looking for ________ from his father. He realized that he was not just letting his father ________ his plans, but he was letting his father spoil his _________. Eventually, he decided to accept his teacher’s ________.
1.A.dusty B.empty C.noisy D.available
2.A.pick B.wake C.call D.turn
3.A.failed B.managed C.tried D.pretended
4.A.Unusually B.However C.Actually D.Therefore
5.A.happy B.daily C.flexible D.busy
6.A.records B.promises C.habits D.rules
7.A.concentrate on B.check up C.hand in D.deal with
8.A.excellent B.steady C.strong D.poor
9.A.tell B.embarrass C.cheat D.hurt
10.A.homework B.emotions C.bravery D.defeats
11.A.pressure B.responsibility C.guilt D.pain
12.A.angrily B.nervously C.quietly D.negatively
13.A.put B.send C.cheer D.eat
14.A.trouble B.plan C.heart D.sadness
15.A.left out B.thought over C.heard of D.took up
16.A.because B.when C.unless D.before
17.A.kindness B.expectation C.attention D.support
18.A.ruin B.develop C.oppose D.change
19.A.character B.reputation C.study D.life
20.A.judgement B.demand C.understanding D.suggestion
高二英语完形填空困难题查看答案及解析
Looking out the window of his truck, Bob Fitzgerald sees large, undesirable plants growing in the fields. Visitors to his neighborhood around the Chesapeake Bay mainly see dying forests and empty farmland. Fitzgerald says the land has been in his family since the 17th century,and it has been sinking for hundreds of years. As sea levels rise salt water is entering rivers and other waterways. As a result, the ground is becoming too salty for crops to grow.
Around the world, scientists warn that coastal (沿海 ) farms are under threat from rising seas and salt water. A World Bank report predicts that rice production in coastal areas may fall by 15 percent by the year 2050. Another study found that hundreds of millions of people will be forced to move inland because of rising waters.
Kate Tully, an agroecologist(农业生态学家) wants to keep coastal farmers in business as the seas rise. The United States Department of Agriculture gave Tully and other researchers $ 1.1 million to study the problem. She and her team hope to give farmers ways to stay on their land. She told media that they are testing different crops on pieces of land around the coastal areas.
"Sorghum is my new favorite crop because it Can grow without rain and it can grow with lots of rain. So this is actually a pretty good option. " The grain crop may be a good choice to feed the nearly 600 million chickens raised in the area each year. As farmers know, chickens can deal with salt, dry weather conditions and heavy rains. Tally's group is also testing other kinds of grain and a few crops that they believe can grow in the salt.
Yet just being able to grow a crop is not enough. The crop has to be profitable. So an economist on the team will be looking at the numbers. But continuing to farm the land may not be the best plan of action. Some people believe the land should he given back to nature. They say the fields should be turned into wetlands, which are popular with duck hunters. "There's money in duck hunting," fully said. Hunting organizations will pay farmers for a permit to hunt on their land. Farmers could earn a lot of money from duck hunters, she said.
Tully and her team are just getting started. It will be a few years before they really understand how to save the farms.
1.In Bob Fitzgerald's neighborhood .
A. forests have been turned into farmland
B. the coastal land becomes unfit for farming
C. production of sea salt takes place of farming
D. environmental pollution has caused the death of forests
2.What does the underlined phrase "under threat" mean?
A. Out of reach. B. In ruins.
C. Under discussion. D. In danger.
3.To help the farmers, Kate Tully's team have .
A. raised money for costal farmers
B. turned the farmland into wetland
C. tested different kinds of grain and crops
D. encouraged the farmers to raise chicken and ducks
4.What is the best title for the passage?
A. The Search of Crops That Will Grow in Salt Water
B. The Past of the Historic Farm Becomes Important
C. Rising Seas Force Changes on Historic Farms
D. The Research on the Effects of Rising Seas
高二英语阅读理解中等难度题查看答案及解析
A: I once heard someone shout, “Look out.” I put my heard out of the window and a bucketful water fell on me. It seems that “Look out” may mean “Don’t look out”.
B: I was once on a ship and heard the captain shout, “All hands on deck(甲板).” I put my hands on the deck and someone walked on them.
C: I once called early on an English friend and the servant who came to the door said, “He’s not up yet. Come back in half an hour.” When I went again for him, she said, “He’s not down yet.” I said, “If he’s neither up nor down. Where is he?”
1.. In the dialogue the phrase “Look out” actually means “______”.
A. Don’t look out B. Look out for the water
C. Be careful D. Look everywhere
2.. The underlined word “them” in the dialogue means _______.
A. my feet B. my hands C. the ship D. the deck
3.. “He is not up” and “He is not down” in the dialogue actually means ______.
A. He doesn’t stand up and doesn’t lie down
B. He doesn’t come up and doesn’t go down
C. He hasn't turned up and hasn't turned down
D. He hasn't got up and he hasn't come downstairs
4.. The writer writes the dialogue to tell us that ______.
A. English is very interesting if you like it and keep on using it
B. it is impossible to learn English very well in a short time
C. language keeps on developing and changing all the time
D. words and phrases may have different meanings in different situations.
高二英语阅读理解简单题查看答案及解析