题型：阅读理解 题类：常考题 难易度：普通
山西省大同市第一中学2017-2018学年高二下学期英语5月月考试卷
It may sound strange, but cutting down a real tree for Christmas is actually greener than going with the artificial kind, one scientist says.
“It is a little confusing to people,” said Clint Springer, a biologist at Saint Joseph's University in Philadelphia. Because of concerns over deforestation（砍伐森林）around the world, many people naturally worry that buying a real tree might contribute to that problem. But most Christmas trees for sale these days are grown not in the forest but on tree farms for the purpose of being cut.
Moreover, from the viewpoint of greenhouse gases, real trees are “the obvious choice”. Live trees actively release oxygen as they grow, and meanwhile remove carbon dioxide from the atmosphere. After they have been cut and Christmas is over, they're usually cut into smaller pieces for mulch（覆盖物）. As mulch, the bits of trees very slowly release carbon dioxide back into the atmosphere. So in the end, a real Christmas tree is carbon neutral, putting the same amount of carbon dioxide back into the air as it took out (although much more slowly).
The tree farms that grow the trees also replant after the trees are cut. Artificial trees, on the other hand, don't come out even in the carbon balance. Petroleum（石油）is used to make the plastics in artificial trees and lots of carbon dioxide-creating energy is required to make and transport them. Because these trees just end up in the places where waste is buried under the ground after use, “those greenhouse gases are lost forever,” Springer said.
China is making great effort to protect its cultural relics. In early May, State Administration of Cultural Heritage (SACH) added 1,943 unmovable cultural relics sites to the list. So the number of these sites on this list will increase to 4,295.{#blank#}1{#/blank#}The newly added sites were reviewed(评审) by more than 130 experts. They spread around Shanxi, Henan, Hunan, Hebei and Jiangsu provinces, including 795 pieces of ancient architecture and 516 ancient ruins.{#blank#}2{#/blank#}In an interview, the head of the SACH said that new types of cultural relics sites have been newly listed to get protection at first, including industrial relics, rural architecture and cultural landscapes.{#blank#}3{#/blank#}For example, some are in the north China's Inner Mongolia Autonomous Region.Despite great achievements during the years of effort, problems still exist.{#blank#}4{#/blank#}Historic relics get stolen and antiques are taken abroad secretly.The head of the SACH said that people has faced a challenge to the protection of cultural relics for a long time. So, balancing the relationship between economic development and protection of history is important. {#blank#}5{#/blank#} He also used good examples of protection, describing how some cultural relics sites have become education bases for young people and popular tourist places, where a lot of people spend their holiday.
A. All of them need protecting as quickly as possible. B. They also include outstanding modern architecture. C. The SACH has found a total of 4,295 cultural relics. D. Many relics have been destroyed in the process of urban construction. E. Cultural relics sites should become positive factors to improve economic development. F. When talking about protecting the cultural relics, the head of SACH ordered some to be saved. G. Moreover, many of the new sites also include valuable cultural relics from ethnic minority regions(少数民族地区). |
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