Earth is surrounded by a blanket of air, which we call the atmosphere. The atmosphere is the mixture of gases and other materials that surround the Earth in a thin, mostly transparent（透明的）shell. It is held in place by the Earth's gravity. It reaches over 560 kilometers (348 miles) from the surface of the Earth, so we are only able to see what occurs fairly close to the ground. Early attempts at studying the nature of the atmosphere used clues from the weather, the beautiful multi-colored（有多种不同颜色的）sunsets and sunrises, and the twinkling of stars. With the use of sensitive（灵敏的）instruments from space, we are able to get a better view of the functioning of our atmosphere.
Life on Earth would not be possible without the atmosphere. Obviously, it provides the oxygen we need to breathe. But it also serves other important functions. It moderates（缓和）the planet's temperature, reducing the extremes that occur on airless worlds. For example, temperatures on the moon range from 120℃ (about 250℉) in the day to －170℃ (about －275℉) at night. It also recycles water and other chemicals. The atmosphere also protects us by absorbing（吸收）and scattering（驱散）harmful radiation from the sun and space. Of the total amount of the sun's energy that reaches the Earth, 30％ is reflected back into space by clouds and the Earth's surface. The atmosphere absorbs 19%. Only 51% is absorbed by the Earth's surface.
The density（密度）of air also decreases rapidly with altitude. At 3 km (2 miles) air density has decreased by 30%. People who normally live closer to sea level experience temporary breathing difficulties when traveling to these altitudes. The highest permanent human settlements are at about 4 km (3 miles) .
(1)The atmosphere is ________ .
[ ]
A．the cloud that surround the earth
B．a mixture of gases and other materials
C．the oxygen we need to breathe
D．a thin, mostly transparent shell
(2)Temperatures on the moon vary greatly between day and night probably because ________ .
[ ]
A．the density of air on the moon is so tow
B．it is very far from the sun
C．it doesn't have the atmosphere as the earth.
D．it has a lot of radiation
(3)What is the main idea of the passage?
[ ]
A．What the atmosphere is and the functions of it（作用）.
B．What the atmosphere is made up of.
C．The density of air decreases with altitude.
D．The atmosphere can moderate the temperatures on the earth.
(4)From the last paragraph we may know that ________ .
[ ]
A．the density of air in the areas close to sea level is thinner than that in the mountainous areas
B．the higher people live, the better the air is
C．the density of air in the mountainous areas is thinner than that in the coastal areas
D．people like to live in the high altitude rather than in the low altitude
天天练口算系列答案科目：高中英语 来源： 题型：054
If you asked high school girls to name their favorite sports, most would probably say basketball or volleyball. I happen to be one of the few girls who would 1 :surfing(冲浪运动). But isn’t that a boy thing? Some people 2 . Most certainly not.
I started surfing about five years ago and 3 in love with the sport on the very first day. Riding that first 4 was the best feeling I had ever experienced.
When I try to 5 surfing with other things, I find it very difficult because, in my
6 there’s nothing like it. It involves(牵涉到)body, 7 , and soul. There’s sand between my toes and cool, salt water all 8 us. The feeling I get when I’m surfing across that 9 , becoming one with the 10 , is like I’m weightless.
The one thing I can 11 from surfing and not any other sport is endless challenge(挑战). You can never be the “best surfer” because the ocean 12 an uncountable variety of waves that nobody can ever master. The variations of surfing styles are wonderful. Some surfers are free and flowing; others are very aggressive(活跃有力的)and 13 . All of these things attract me to surfing and make it 14 from any other sport.
I’ve 15 to tell every girl I know to do something that people don’t think girls can do. It's part of being human to advance to new 16 , so shouldn't it be expected that girls should step up and start 17 the limits of things boys and men used to dominate(主宰)?
There’re women 18 side by side with the President of our country, so why not side by side with the boys 19 the football team or out in the water surfing? Give girls a chance to 20 , and they will.
1. A. tell B. answer
C. give D. realize
2.
A. wonder B.
understand
C. reply
D.
believe
3. A. stayed B. came
C. dropped D. fell
4. A. wave B. storm
C. sail D. boat
5. A. bring B. connect
C. compare D. tie
6. A. work B. study
C. holiday D. life
7. A. mind B. effort
C. health D. time
8. A. along B. above
C. around D. by
9. A. beach B. water
C. board D. lake
10. A. sky B. world
C. earth D. ocean
11. A. take B. get
C. make D. keep
12. A. catches B. includes
C. offers D. collects
13. A. sharp B. great
C. hard D. calm
14. A. known B. right
C. far D. different
15. A. chosen B. tried
C. learned D. promised
16. A. levels B. points
C. steps D. parts
17. A. reaching B. accepting
C. pushing D. setting
18. A. sitting B. walking
C. fighting D. working
19. A. of B. from
C. on D. with
20. A. think B. succeed
C. perform D. feel
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科目：高中英语 来源： 题型：054
In the past, man did not have to think about the protection of his environment(环境). There were few people on the earth, and natural resources seemed to be 1 .
Today things are 2 . The world has become too 3 . We are using up our natural resources too quickly, and at the same time we are 4 our environment with dangerous chemicals. If we 5 to do this, human life on the earth will not survive(幸存).
Everyone 6 today that if too many fishes are taken from the sea, there will soon be none left. Yet with modern fishing 7 , more and more fishes are caught. We know that if too many trees are cut down, 8 will disappear and nothing will grow on the land. Yet, we 9 to use bigger and more powerful machines to 10 more and more trees. We realize that if rivers are polluted with waste products from factories, we will die. 11 , in most countries, waste products are 12 put into rivers or into the sea, and there are 13 laws to stop this.
We know, too, that if the 14 of the world continues to rise at the present rate, in a few years, there will not be enough 15 . What can we do to solve(解决) these problems?
If we eat more vegetables and less 16 , there will be more food available(可得到的) for everyone. Land that is used to grow crops 17 five times more people than land where animals are kept.
Our natural resources will 18 longer if we learn to recycle them.
The world population will not rise so quickly if people use modern methods of birth 19 .
Finally, if we educate people to think about the problems, we shall have a better and cleaner 20 in the future.
1. A. beautiful B. unlimited
C. rare D. valuable
2. A. common B. the same
C. changeable D. different
3. A. crowded B. small
C. dirty D. busy
4. A. protecting B. saving
C. polluting D. fighting
5. A. try B. continue
C. decide D. have
6. A. wonders B. realizes
C. considers D. discovers
7. A. poles B. boats
C. methods D. ideas
8. A. mountains B. the sea
C. trees D. forests
9. A. continue B. have
C. ought D. act
10. A. grow B. plant
C. save D. cut
11. A. Thus B. However
C. Generally speaking D. Therefore
12. A. still B. even
C. also D. certainly
13. A. too many B. a few
C. some D. few
14. A. production B. pollution
C. population D. revolution
15. A. houses B. vegetables
C. food D. lives
16. A. fruit B. meat
C. fish D. grain
17. A. feeds B. increases
C. supplies D. helps
18. A. use B. stay
C. keep D. last
19. A. control B. born
C. plan D. reward
20. A. nature B.sea
C. planet D. forest
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科目：高中英语 来源：英语教研室 题型：054
I started surfing about five years ago and 3 in love with the sport on the very first day. Riding that first 4 was the best feeling I had ever experienced.
When I try to 5 surfing with other things, I find it very difficult because, in my
6 there’s nothing like it. It involves(牵涉到)body, 7 , and soul. There’s sand between my toes and cool, salt water all 8 us. The feeling I get when I’m surfing across that 9 , becoming one with the 10 , is like I’m weightless.
The one thing I can 11 from surfing and not any other sport is endless challenge(挑战). You can never be the “best surfer” because the ocean 12 an uncountable variety of waves that nobody can ever master. The variations of surfing styles are wonderful. Some surfers are free and flowing; others are very aggressive(活跃有力的)and 13 . All of these things attract me to surfing and make it 14 from any other sport.
I’ve 15 to tell every girl I know to do something that people don’t think girls can do. It's part of being human to advance to new 16 , so shouldn't it be expected that girls should step up and start 17 the limits of things boys and men used to dominate(主宰)?
There’re women 18 side by side with the President of our country, so why not side by side with the boys 19 the football team or out in the water surfing? Give girls a chance to 20 , and they will.
1. A. tell B. answer
C. give D. realize
2.
A. wonder B.
understand
C. reply
D.
believe
3. A. stayed B. came
C. dropped D. fell
4. A. wave B. storm
C. sail D. boat
5. A. bring & nbsp; B. connect
C. compare D. tie
6. A. work B. study
C. holiday D. life
7. A. mind B. effort
C. health D. time
8. A. along B. above
C. around D. by
9. A. beach B. water
C. board D. lake
10. A. sky B. world
C. earth D. ocean
11. A. take B. get
C. make D. keep
12. A. catches B. includes
C. offers D. collects
13. A. sharp B. great
C. hard D. calm
14. A. known B. right
C. far D. different
15. A. chosen B. tried
C. learned D. promised
16. A. levels B. points
C. steps D. parts
17. A. reaching B. accepting
C. pushing D. setting
18. A. sitting B. walking
C. fighting D. working
19. A. of B. from
C. on D. with
20. A. think B. succeed
C. perform D. feel
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科目：高中英语 来源：英语教研室 题型：054
For hundreds of years after that there were few inventions that have as much 3 as the wheel. Then in the early 1800’s the world started to 4 . There was little unknown land in the world. People did not 5 to explore any more. They began to work so as to
6 life better.
In the second half of the 19th century many great inventions were made. 7 them were the camera, the electric light and the radio. These all became a big 8 of our life today.
The first part of the 20th century saw more great 9 : the helicopter in 1909; movies with sound in 1926; the computer in 1928; and jet planes in 1930. This was also a time 10
a new material was first made. Nylon came 11 in 1935. It changed the 12 of clothes people had been wearing.
The middle part of the 20th century brought new ways to help people get over 13 .
They worked very well. They made people healthier and let them live 14 lives. By the 1960’s most people could 15 to live at least 60.
By this time most people had a very good life. Of course new inventions 16 to be made. But man now had a desire to explore again. The world was 17 to man but the stars were not. Man began looking for ways to go into 18 . Russia made the first step. Then the United States took a step. Since then other countries, 19 China and Japan have made their steps into space.
In 1969 man took his biggest step away from the earth. Americans first walked on the moon. This is certainly just a 20 thought. New inventions will someday allow us to do things we have never dreamed of.
1. A. the one B. that C. one D. it
2. A. carry B. bring C. find D. put
3. A. time B. knowledge
C. situation D. effect
4. A. appear B. mind
C. change D. rise
5. A. have B. want
C. decide D. like
6. A. work B. turn &nb sp;
C.make D. think
7. A.In B. Among
C. Between D. About
8. A. sort B. part
C. step D. use
9. A. results B. jobs
C. things D. inventions
10. A. when B. which
C. if D. as
11. A. out B. in
C. away D. about
12. A. rest B. course
C. kind D. pattern
13. A. rules B. diseases
C. difficulties D. problems
14. A. more important B. longer
C. happier D. better
15. A. hope B. expect
C. start D. ask
16. A. go on B. begin
C. are able D. continue
17. A. useful B. popular
C. common D. known
18. A. space B. sky
C. air D. room
19. A. including B. except
C. but D. like
20. A. moving B. interesting
C. beginning D. surprising
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科目：高中英语 来源：英语教研室 题型：054
Today things are 2 . The world has become too 3 . We are using up our natural resources too quickly, and at the same time we are 4 our environment with dangerous chemicals. If we 5 to do this, human life on the earth will not survive(幸存).
Everyone 6 today that if too many fishes are taken from the sea, there will soon be none left. Yet with modern fishing 7 , more and more fishes are caught. We know that if too many trees are cut down, 8 will disappear and nothing will grow on the land. Yet, we 9 to use bigger and more powerful machines to 10 more and more trees. We realize that if rivers are polluted with waste products from factories, we will die. 11 , in most countries, waste products are 12 put into rivers or into the sea, and there are 13 laws to stop this.
We know, too, that if the 14 of the world continues to rise at the present rate, in a few years, there will not be enough 15 . What can we do to solve(解决) these problems?
If we eat more vegetables and less 16 , there will be more food available(可得到的) for everyone. Land that is used to grow crops 17 five times more people than land where animals are kept.
Our natural resources will 18 longer if we learn to recycle them.
The world population will not rise so quickly if people use modern methods of birth 19 .
Finally, if we educate people to think about the problems, we shall have a better and cleaner 20 in the future.
1. A. beautiful B. unlimited
C. rare D. valuable
2. A. common B. the same
C. changeable D. different
3. A. crowded B. small
C. dirty D. busy
4. A. protecting B. saving
C. polluting D. fighting
5. A. try B. continue
C. decide D. have
6. A. wonders B. realizes
C. considers D. discovers
7. A. poles B. boats
C. methods D. ideas
8. A. mountains B. the sea
C. trees D. forests
9. A. continue B. have
C. ought D. act
10. A. grow B. plant
C. save D. cut
11. A. Thus B. However
C. Generally speaking D. Therefore
12. A. still B. even
C. also D. certainly
13. A. too many B. a few
C. some D. few
14. A. production B. pollution
C. population D. revolution
15. A. houses B. vegetables
C. food D. lives
16. A. fruit &nb s p; B. meat
C. fish D. grain
17. A. feeds B. increases
C. supplies D. helps
18. A. use B. stay
C. keep D. last
19. A. control B. born
C. plan D. reward
20. A. nature B.sea
C. planet D. forest
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