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It is midnight on September 22，2012．The sky above Manhattan，New York is filled with a curtain of colorful light． New Yorkers are fascinated by the beautiful aurora(极光)．However, their fascination is short-1ived．
Within a few seconds，electric bulbs dim(变暗)and flicker(闪烁)，then become unusually bright for a few seconds．Then all the lights second go out．Within 90 seconds，the entire eastern half of the US is without power．
Besides the US，Europe，Japan and China are also hit by the same terrible event．It is a violent solar flare(太阳耀斑)，150 million kilometers away on the surface of the sun．
Science fiction? No．A report funded by NASA and issued by the US National Academy of Sciences in January this year says it could happen．
A massive solar flare is most likely on a spring or autumn night in 2012，according to the report．
Solar flares are huge explosions on the surface of the sun．In a matter of just a few minutes they heat material to many millions of degrees and release as much energy as a billion megatons(百万吨)of TNT explosives．Solar flares release a stream of charged high-energy particles(粒子)．They are called“solar winds”
If one solar‘‘wind’’should hit the Earth's magnetic shield(磁扬)，the result could be terrible for humans.
But there’s no need to run for cover from solar winds． They do not harm 1ife on Earth，they only affect the way we live，especially since we depend so much on modern technology．They can pump extra electricity into power line, and pipelines，causing blackouts and fuel leaks(泄漏). Solar winds are also known to affect mobile phone operations, and may disrupt wireless Internet services．
Moreover, solar winds can prevent normal satellite operations，and disrupt radio communications and navigation systems such as the Global Positioning System．
Auroras are powered by solar wind．This wind blows past the Earth at about 400-700 km per second and creates storms in the Earth’s magnetic environment．In the polar regions these explode into southern or northern polar lights．
The most serious solar storm that hit Earth in history happened in 1859． It caused the failure of telegraph(电报)systems in Europe and North America．
So, for humans，the sun is a double-edged sword． Without1 the sun, there would be no 1ife on Earth． Without the sun， Earth would be a frozen dark ball floating in space．However, on the other hand，the sun can disorder our 1ives from time to time．
10．What is the main idea of the passage?
A．It introduces to readers the advantages and disadvantages of the sun．
B．It describes a science fiction set in Manhattan on 22 September 2012．
C．It shows readers the way in which solar winds form inside the sun．
D．It explains what solar flares are and their effects on human life．
11．The first two paragraphs are written_________.
A．to show a beautiful scene in a true story
B．to describe the beautiful scenery of Manhattan
C．to describe the power problem around the world
D．to introduce the topic of this passage
12．What can we conclude from the passage?
A．Solar flares will do great harm to those who are using the Internet．
B．Solar flares cannot reach as far as the polar regions．
C．Solar flares are huge explosions that happen inside the sun．
D．1f it weren’t’t for our reliance on technology, solar flares probably wouldn’t affect us．
13．Solar winds will likely affect us in the following ways EXCEPT that ．
A．normal satellite operations will be stopped
B．the lights in the areas affected will go out at the same time
C．people on the streets will be struck to death
D．some navigation systems will be out of order
查看习题详情和答案>>It is only during the last few years that man has generally realized that in the world of nature a balance exists between all forms of life. No living thing can exist by itself: it is a part of a system (体系) in which all forms of life are joined together. If we change one part of the natural order, this will in its turn almost certainly bring about changes in some other part.
The cutting down of forests reduces the supply of oxygen. The killing of weeds and insects by chemicals leads to the wide spread poisoning of animals and birds. The throwing of waste products into the ocean harm to life in the sea, while waste gases change the chemical balance of the atmosphere.
And so we could go on, adding more examples, until in despair (绝望) we might feel like giving up the struggle to control and keep within limits these harmful human activities. Man is very clever at changing the world around him to satisfy his immediate needs, but not so clever at looking far ahead, or at thinking about what the future results of his action might be.
The first paragraph mainly tells us that __________.
A. everything in nature can’t exist without the help of human beings
B. no living thing can exist naturally
C. all living things in nature depend on each other
D. man has well known the importance of the balance for a long time
The examples given in the second paragraph are used to prove that __________.
A. it is very important to protect forests
B. there are some living things which can exist all by themselves without change
C. all forms of life belong to a system in which all the part can be changed for one another
D. we cannot change one form of life or matter without disturbing (扰乱) the balance of nature
In the second paragraph the underlined word “atmosphere” means __________.
A. the production of chemical factories B. the gas in the outer space
C. the mixture of gases that surrounds the earth D. the health of the human body
The third paragraph suggests that __________.
A. man shouldn’t think only about his immediate needs without enough thought on the future results
B. man is very clever in planning his distant future
C. man often feels that he has to give up in despair
D. man is always anxious to control and keep his actives within limits
查看习题详情和答案>>It is already home to whales, seals and polar bears, but soon the Arctic (北极) must find __1__ for some Chinese visitors.
A team of nine scientists will __2__ to the Arctic this month to mark the opening of China's __3__ Arctic scientific research station, SOA (the State Oceanic Administration (国家海洋局) has __4__.
Construction of the station finished a while __5__, but operations were held __6__ during the polar night, __7__ normally runs from late October to the end of February. __8__this period, the sun never __9__ over the Arctic. And from mid-July to the end of August, the sun never sets, a time__10__ as polar day (极昼).
With territories (版图) __11__ far up into the northern half of the globe, China __12__Arctic studies to learn __13__ about its climatic and environmental changes. Many of these, __14__ sand storms and heavy droughts, are believed to have __15__ to do with the Arctic.
Research teams __16__ the area in 1999 and 2003, but the new station will allow scientists to study the Arctic in __17__ depth.
The station is a two-storey building and __18__ a laboratory, office, reading room, bedroom and storeroom. It can hold 20 to 25 researchers.
"It will be __19__ great support to the scientists' research there," said Xia Limin, an officer in SOA.
This year the SOA also plans to upgrade (提升) two existing scientific bases in the Antarctic (南极洲). They are "Great Wall", which was set up in 1985, and "Zhongshan", __20__ five years later.
A. house B. hotel C. palace D. room
A. journey B. travel C. trip D. tour
A. first B. second C. third D. fourth
A. told B. spoke C. announced D. published
A. before B. later C. after D. ago
A. forward B. toward C. back D. ahead
A. which B. through which C. that D. where
A. During B. While C. When D. As
A. raises B. rises C. lifts D. carries
A. knows B. to know C. known D. knowing
A. spreading B. spreads C. to spread D. spread
A. works out B. picks out C. keeps out D. carries out
A. less B. more C. few D. much
A. for example B. such as C. for instance D. such that
A. something B. anything C. everything D. nothing
A. showed B. went C. visited D. got
A. great B. greeting C. greater D. greatest
A. includes B. contains C. including D. containing
A. to B. for C. at D. of
A. establishing B. to establish C. established D. establish
查看习题详情和答案>>It is already home to whales, seals and polar bears, but soon the Arctic (北极) must find __1__ for some Chinese visitors.
A team of nine scientists will __2__ to the Arctic this month to mark the opening of China's __3__ Arctic scientific research station, SOA (the State Oceanic Administration (国家海洋局) has __4__.
Construction of the station finished a while __5__, but operations were held __6__ during the polar night, __7__ normally runs from late October to the end of February. __8__this period, the sun never __9__ over the Arctic. And from mid-July to the end of August, the sun never sets, a time__10__ as polar day (极昼).
With territories (版图) __11__ far up into the northern half of the globe, China __12__Arctic studies to learn __13__ about its climatic and environmental changes. Many of these, __14__ sand storms and heavy droughts, are believed to have __15__ to do with the Arctic.
Research teams __16__ the area in 1999 and 2003, but the new station will allow scientists to study the Arctic in __17__ depth.
The station is a two-storey building and __18__ a laboratory, office, reading room, bedroom and storeroom. It can hold 20 to 25 researchers.
"It will be __19__ great support to the scientists' research there," said Xia Limin, an officer in SOA.
This year the SOA also plans to upgrade (提升) two existing scientific bases in the Antarctic (南极洲). They are "Great Wall", which was set up in 1985, and "Zhongshan", __20__ five years later.
1. A. house B. hotel C. palace D. room
2. A. journey B. travel C. trip D. tour
3. A. first B. second C. third D. fourth
4. A. told B. spoke C. announced D. published
5. A. before B. later C. after D. ago
6. A. forward B. toward C. back D. ahead
7. A. which B. through which C. that D. where
8. A. During B. While C. When D. As
9. A. raises B. rises C. lifts D. carries
10. A. knows B. to know C. known D. knowing
11. A. spreading B. spreads C. to spread D. spread
12. A. works out B. picks out C. keeps out D. carries out
13. A. less B. more C. few D. much
14. A. for example B. such as C. for instance D. such that
15. A. something B. anything C. everything D. nothing
16. A. showed B. went C. visited D. got
17. A. great B. greeting C. greater D. greatest
18. A. includes B. contains C. including D. containing
19. A. to B. for C. at D. of
20. A. establishing B. to establish C. established D. establish
查看习题详情和答案>>It was the first mow of winter -- an exciting day for every, child but not for most tether. Up until now, l had been able to dress myself for recess（课间休息）, but today I would need some help. Miss Finlayson, my kindergarten teacher at Princess Elizabeth School near Hamilton, Ontario, had been through first snow days ,tony times in her long career, but I think struggled still remember this one.
I managed to get into my wool snow pants. But I straggled with my jacket because it didn’t fit well. It was a hand-me-down from my brother, and it made me wonder why I had to wear his ugly clothes. At least my hat and matching scarf were mine, and they were quite pretty. Finally it was time to have Miss Finlayson help me with my boots. In her calm, motherly voice she said, "By the end of winter, you will be able to put on own boots. “ I didn’t realize at the time that this was more a statement of hope than of confidence.
I handed her my boots and stuck out my foot. Like most children, I expected the adult to do an the work. After mush wiggling and pushing, she managed to get first one into place and then, with a sigh, worked the second one on too.
I announced，“They’re on the wrong feet．”With the grace that only experience can bring，she struggled to get the boots off and went through the joyless task of putting them on again．Then I said，“These aren’t my boots．you know．”As she pulled the offending boots from my feet，she still managed to look both helpful and interested．Once they were off．I said，“They are my brother’s boots．My mother makes me wear them，and I hate them!” Somehow，from long years of practice，she managed to act as though I wasn’t an annoying little girl．She pushed and shoved．less gently this time，and the boots were returned to their proper place on my feet．With a great sigh of relief，seeing the end of her struggle with me，she asked，“Now，where are your gloves?’’
I looked into her eyes and said．“I didn’t want to lose them．so I put them into the toes of my boots．”
60．According to the passage，the little girl got from her brother．
A．the wool snow pants and the jacket B．the jacket and the boots
C．the jacket and the hat D．the boots and the gloves
61．What made it so hard for the teacher to help the little girl put her boots on?
A．The gloves in the toes of the boots． B．The slowness of the teacher．
C．The wrong size of the boots． D．The unwillingness of the girl．
62．It can be inferred that before the little girl finally went out to enjoy the first snow of winter，the teacher had to help her put on her boots ．
A．once B．twice C．three times D．four times
63．Which of the following sentences from the text BEST indicates that the teacher is very considerate?
A．In her calm，motherly voice she said，“By the end of winter，…”（Paragraph 2）
B．With the grace that only experience can bring，she struggled to…（Paragraph 4）
C．…．she still managed to look both helpful and interested．（Paragraph 4）
D．…，she managed to act as though I wasn’t an annoying little girl.（Paragraph 4）
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