It is thought traditionally that trees What result has the first research found?

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问题 It is thought traditionally that trees
What result has the first research found?

选项 A、The roots of trees can save nutrients in the soil.
B、The trees can steady the flow of the rivers.
C、In the next 30 years, the water demand will add by around 50%.
D、Trees trap much less water than they consume in arid areas.

答案D

解析 事实细节题。第二段介绍了第一项研究的结果,由第二句可知选项D是该句的同义转述。而最后一句主句中的否定词则表明选项A、B错误;选项C是下一段的介绍,不属于第一项研究的结果。
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