| 阅读理解。 |
| Feb.3,2006-According to CCTV 4,Chinese scientists have recently taken the lead in building the first 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. |
| 1. What's the best title for the passage? |
| A. Wan Yuanxi and His Invention. B. The Sun and the" Artificial Sun". C. How to Produce the" Artificial Sun". D. China Built the World's First"Artificial Sun". |
| 2. What does the underlined word" artificial". ( in Para. 1 ) mean? |
| A. Not real. B. Man-made. C. Actual. D. Ancient. |
| 3. Which of the following is NOT true? |
| A. The temperature of the innermost part of the " artificial sun" will reach as high as 100 ,000 ,000?. 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. |
| 4. What's the purpose of making the" artificial sun" ? |
| A. To get more energy. 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. |