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full super-conducting experimental nuclear fusion (核聚变) device known as"artificial sun"in the world,
which will produce energy like the sun.
It is reported that this device consists of five layers of components(成分)from inside to outside and the
circulating magnet container in the innermost layer looks like a giant" swim ring". In experimental tests,the
temperature of inner" swim ring" will reach as high as 100 million degrees Celsius. Therefore,such
component is a significant part to stimulate solar fusion reactions.
Wan Yuanxi,who is in charge of the project called Experimental Advanced Super-conducting
Tokamak( EAST) ,an important scientific project under China's ninth five-ycar plan,explained the reason
why the sun always gives off light and why the energy it produces will not decrease. Under high pressure
and high temperature, fusion reactions will take place from inside to outside of the sun.
Such fusion reactions will give rise to a great deal of energy to enable the sun to continuously emit light
and heat. However,fusion reactions on the sun are uncontrollable,just like an H-bomb explosion seen on
the earth. A huge amount of energy will be produced in a minute,which may be destructive. In order to
make use of such energy,a transformation from the process of energy production to a stable,sustainable
and controllable process is needed. EAST is serving to initiate such a transformation. Under magnetic
force,the op-
eration of hydrogen plasma isotope (同位素) will be restrained in the" swim ring" and high density
collision will happen, namely the fusion reactions. The hydrogen isotope got from one liter of seawater
can produce energy equal to 300 liters of gasoline through complete fusion reactions.
Wan said that we can get endless clean energy by producing such a device for accomplishing fusion
reactions,which is equal to one or a few small suns made by human beings themselves so that they can
ceaselessly obtain energy from nuclear fusions.
B. The Sun and the" Artificial Sun".
C. How to Produce the" Artificial Sun".
D. China Built the World's First"Artificial Sun".
B. Man-made.
C. Actual.
D. Ancient.
B. EAST is an important scientific project under China's ninth five-year plan.
C. Such fusion reactions in the" artificial sun" will give us limited energy.
D. The hydrogen isotope got from one liter of seawater can produce energy equal
to 300 liters of gasoline through complete fusion reactions.
B. To get more light.
C. To have the sun shining for us in 24 hours
D. To study the inside of the real sun.
World Expo 2010 Shanghai China is to be staged in Shanghai from May 1 to October 31, 2010. If you plan to visit the Shanghai Expo this summer, China Pavilion(馆)is a must - see area for you.
China Pavilion, which is called Oriental Crown, is located at the center of the Expo site. Standing 63 meters tall, the China Pavilion takes the shape of an emperor's crown, with the upper layers larger than the lower ones. Covering 160,000 square meters in floor space, the pavilion is made up of a national hall and a regional(宗教的 ) hall. Buildings on the China Pavilion began on Dec. 18, 2007. The design of the China Pavilion was picked from a total of 344 designs put forward by Chinese from around the world. The pavilion has both traditional and modern features, which helps develop the theme of the 2010 Expo; "Better City, Better Life. For example, it is red in appearance, which covers the traditional Chinese culture, and it is green indoors, with the use of energy - saving techniques. The Shanghai World Expo is expected to attract 70 million visitors from across the globe. It is estimated that 400,000 people will visit the Expo and its 140 pavilions every day during the period, but the China Pavilion is only able to receive about one tenth of the total. How to hold so many people in the pavilion remains a tough task. Luckily, the China Pavilion is built as a permanent(长久的) landmark.
During the Expo, the main structure(结构 ) will be used for an exhibition based on the theme of “ Chinese wisdom in urban (城市)development” by explaining the values of harmony(和谐 ), nature and spirit. The three - story pavilion has three sections. The top floor's “Footprint of the East” will show some of the changes in Chinese cities. There, you can see a film which shows how Chinese cities have changed, especially in the past 30 years. According to Lu Chuan, director of the film, the scenery is like something from Lord of the Rings. On the second floor, “Journey of Wisdom” will explain China's four great inventions. And the ground's “ Blossoming” City will display scenes from cities of the future.
1. Which of the following words can be used to describe the China Pavilion?
A.Tiny. |
B.Imagination |
C.Foreign |
D. Environment - friendly. |
2.The China Pavilion can receive________visitors at most per day.
A.20,000 |
B.40,000 |
C. 100,000 |
D.400,000 |
3.We can infer(推断 )that________.
A.Some foreign friends took part in the designs of the China Pavilion |
B.You can continue to visit the Japanese Pavilion after the Expo is over |
C.China Pavilion will be pulled down after the World Expo 2010 is over |
D.China Pavilion will continue to be open to visitors after the Expo is over |
4. On the second floor, you can________.
A.enjoy a film about the changes of cities in China |
B.learn what Shanghai looked like in the 1920's |
C.find out how paper was invented |
D.see how Chinese cities will look like in the future |
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It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes. More often the doctors can’t fix the damage. Sometimes they are afraid to try something to help because it is dangerous to work on the brain. The doctors might make the person worse if he operates on the brain.
Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, then he operated on them. He made the monkeys’ blood go through a machine. The machine cooled the blood. Then the machine sent the blood back to the monkeys’ brains. When the brain’s temperature was 10°C, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they had been before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.
【小题1】The biggest difficulty in operating on the damaged brain is that _______.
A.the time is too short for doctors |
B.the patients are often too nervous |
C.the damage is extremely hard to fix |
D.the blood-cooling machine might break down |
A.taking the blood out of the brain |
B.trying the operation on monkeys first |
C.having the blood go through a machine |
D.lowering the brain’s temperature |
A.can last as long as 30 minutes |
B.can keep the brain’s blood warm |
C.can keep the patient’s brain healthy |
D.can help monkeys do different jobs |
a. send the cooled blood back to the brain
b. stop the blood to the brain
c. have the blood cooled down
d. operate on the brain
A.a, b, c, d | B.c, a, b, d | C.c, b, d, a | D.b, c, d, a |
World Expo 2010 Shanghai China is to be staged in Shanghai from May 1 to October 31, 2010. If you plan to visit the Shanghai Expo this summer, China Pavilion(馆)is a must - see area for you.
China Pavilion, which is called Oriental Crown, is located at the center of the Expo site. Standing 63 meters tall, the China Pavilion takes the shape of an emperor's crown, with the upper layers larger than the lower ones. Covering 160,000 square meters in floor space, the pavilion is made up of a national hall and a regional(宗教的 ) hall. Buildings on the China Pavilion began on Dec. 18, 2007. The design of the China Pavilion was picked from a total of 344 designs put forward by Chinese from around the world. The pavilion has both traditional and modern features, which helps develop the theme of the 2010 Expo; "Better City, Better Life. For example, it is red in appearance, which covers the traditional Chinese culture, and it is green indoors, with the use of energy - saving techniques. The Shanghai World Expo is expected to attract 70 million visitors from across the globe. It is estimated that 400,000 people will visit the Expo and its 140 pavilions every day during the period, but the China Pavilion is only able to receive about one tenth of the total. How to hold so many people in the pavilion remains a tough task. Luckily, the China Pavilion is built as a permanent(长久的) landmark.
During the Expo, the main structure(结构 ) will be used for an exhibition based on the theme of “ Chinese wisdom in urban (城市)development” by explaining the values of harmony(和谐 ), nature and spirit. The three - story pavilion has three sections. The top floor's “Footprint of the East” will show some of the changes in Chinese cities. There, you can see a film which shows how Chinese cities have changed, especially in the past 30 years. According to Lu Chuan, director of the film, the scenery is like something from Lord of the Rings. On the second floor, “Journey of Wisdom” will explain China's four great inventions. And the ground's “ Blossoming” City will display scenes from cities of the future.
【小题1】 Which of the following words can be used to describe the China Pavilion?
A.Tiny. | B.Imagination | C.Foreign | D. Environment - friendly. |
A.20,000 | B.40,000 | C. 100,000 | D.400,000 |
A.Some foreign friends took part in the designs of the China Pavilion |
B.You can continue to visit the Japanese Pavilion after the Expo is over |
C.China Pavilion will be pulled down after the World Expo 2010 is over |
D.China Pavilion will continue to be open to visitors after the Expo is over |
A.enjoy a film about the changes of cities in China |
B.learn what Shanghai looked like in the 1920's |
C.find out how paper was invented |
D.see how Chinese cities will look like in the future |
When times get tough,we all look for ways to cut back.When we're hungry,we eat at home instead of going out.We take buses instead of taxis.And we wear our old designer jeans just a few months longer.With college expenses at all?time highs,high school students are eager to do anything to cut the cost of a university education.
One cost?cutting proposal is to allow college students to get a bachelor's degree in three years instead of four.Educational institutions have been actively exploring ways to make the learning process more efficient.But there's a question:Would the quality of undergraduate(本科生)education suffer? Few US universities have formally approved a “three?year degree”model.
I doubt that mainstream North American colleges will carry out a three?year curriculum(课程)any time soon.For one thing,most universities already allow highly qualified students to graduate early by testing out of certain classes and obtaining a number of college credits(学分).In addition,at famous universities,the committee who determine which courses are required and which courses are electives are unlikely to suddenly “throw out”one quarter of the required credits.Professors will resist “diluting(稀释)”the quality of the education they offer.
In my opinion,a quality four?year education is always superior to a quality three?year education.A college education requires sufficient time for a student to become skilled in their major and do coursework in fields outside their major.It is not a good idea to water down education,any more than it's not a good idea to water down medicine.If we want to help students find their way through university,we should help them understand early on what knowledge and skills they need to have upon graduation.We should allow students to test out of as many courses as possible.We should give them a chance to earn money as interns(实习生)in meaningful part?time jobs that relate to their university studies,such as the five?year co?op program at Northeastern University.
1.The first paragraph serves as a(n) ________.
A.explanation? ????????????? ????????????? ????????????? B.definition
C.introduction? ????????????? ????????????? ????????????? D.comment
2.In most US universities,________.
A.college students are offered the co?op program
B.electives' credits make up one quarter of the required credits
C.all students are required to finish four?year education before graduation
D.some excellent students can graduate ahead of time
3.We can infer that ________.
A.the author is a college professor
B.the author thinks the cost of a university education is too high for people to afford
C.the author considers the university education quality very important
D.the author pays special attention to the all?round development of college students
4.Which of the following can be the best title?
A.It's time to shorten the learning process
B.Best learning takes place over time
C.University education should be watered down
D.College education calls for reform
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