Ⅱ.阅读理解

　　NANJING, June 13,2009(Xinhua)—China will see the longest total solar eclipse(日食)in 500 years on July 22, a scientist said Saturday.

　　The most important time of the total eclipse was expected to begin from 9：00 a．m. to 9：38 a．m(Beijing Time), said Wang Sichao, a research fellow with the Nanjing—based Purple Mountain Observatory under the Chinese Academy of Sciences. “The total eclipse will last up to six minutes, which is the longest one that can be seen in China in almost 500 years from 1,814 to 2,309，” Wang said.

　　He said viewers in parts of eleven provinces in Chinas southwestern, central­southern and eastern areas, such as Tibet, Hunan and Jiangsu, will be able to witness the total solar eclipse, while in most parts of Shanghai, viewers can also see the fantastic phenomenon. For viewers in other provinces, including Beijing, they can observe a part of the eclipse, he said.

　　A solar eclipse occurs when the moon is caught between the sun and the earth while each of them moves along their fixed orbits. In a total solar eclipse, the sun, the moon and the earth are directly in a line as the sun swings into the shadow cast by the moon.

　　Wang said the next total solar eclipse that can be seen in China will fall on March the 20th, 2034. “But it can only be seen in remote provinces, such as Tibet and Qinghai. It cannot be compared with the upcoming one—in terms of time of lasting and number of cities that can see the eclipse，” he added. The last total solar eclipse visible in China took place on the first of August last year. It was observed in northwest China and lasted two minutes in Yiwu County of northwestern Xinjiang, the best place to see the phenomenon.

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