更多"Low-level slash-and-burn farming do"的相关试题:
[单项选择] Low-level slash-and-burn farming doesn’’t harm rainforest. On the contrary, it helps farmers and improves forest soils. This is the unorthodox view of a German soil scientist who has shown that burnt clearings in the Amazon, dating back more than 1,000 years, helped create patches of rich, fertile soil that farmers still benefit from today.
Most rainforest soils are thin and poor because they lack minerals and because the heat and heavy rainfall destroy most organic matter in the soils within four years of it reaching the forest floor. This means topsoil contains few of the ingredients needed for long-term successful farming.
But Bruno Glaser, a soil scientist of the University of Bayreuth, has studied unexpected patches of fertile soils in the central Amazon. These soils contain lots of organic matter.
Glaser has shown that most of this fertile organic matter comes from "black carbon" -- the organic particles from camp fires and charred (烧成炭的) wood left over from th
A. it does no harm to the topsoil of the rainforest
B. it destroys rainforest soils
C. it helps improve rainforest soils
D. it diminishes the organic matter in rainforest soils
[填空题]According to Dr. Applebaum, the greatest harm of television is that ________.
[简答题]{{B}} Will Tourism Bring Harm to the Environment {{/B}}
You are to write in three parts.
In the first part, state specifically what your opinion is.
In the second part, provide one or two reasons to support your opinion.
In, the last part, bring what you have written to a natural conclusion or make a summary.
Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the instructions may result in a loss of marks.
[单项选择]A. She doesn’t know where it is.
B. She doesn’t want to go fishing with the man.
C. She knows how to go there.
D. She will go even though it is far.
[简答题]Why doesn’’t Steve want to go home
