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题型:语法填空-短文语填 难度:0.65 引用次数:108 题号:18089000
阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Trees absorb carbon from the atmosphere, in the form of carbon dioxide. A living tree is thus     1     important storage site for carbon     2     might otherwise be added to the levels of carbon dioxide in the atmosphere. And a big, living tree matters even     3    (much)to the atmosphere.

However, when scientists try to understand the importance of the carbon storage     4    (current) provided by plants, and the effects of a number of human     5    (activity) on the carbon cycle, they are faced with the fact that there are no direct measurements of carbon cycling from the pre-industrial period.

A new study,     6    (publish) today in the journal Science, seeks     7    (fill) this knowledge gap using the assemblages of fossil pollen(花粉化石) in the soil as an indication of woody vegetation biomass in the past. An international team of scientists     8    (use) fossil pollen data to reconstruct the natural pace and pattern of carbon storage in the forests of the Midwestern U. S. over the past 10, 000 years. Their findings cast a new light on how landscapes can     9    (manage) to maximize carbon storage while also meeting conservation goals. Their work painted a vivid picture of     10    forests have changed over this time. The researchers found that, after an initial post-glacial decline, woody biomass nearly doubled during the last 8, 000 years.

【知识点】 人与环境

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【推荐1】阅读下面两篇短文,在空白处填入1个适当的词或括号内单词的正确形式。

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