[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”—theorganic particles from camp
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

[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”—theorganic particles from camp
A. studying patches of fertile soils in the central Amazon
B. examining pottery left over by ancient civilizations
C. test-burning patches of trees in the central Amazon
D. radiocarbon-dating ingredients contained in forest soils

[单项选择]The farming methods have been______improved with the inventfion of the new machine.
A. efficiently
B. proficiently
C. professionally
D. intentionally

[单项选择]以下程序的输出结果是 ( ) struct HAR { int x，y；struct HAR *p；} h[2]； main（　） { h[0].x＝1；h[0].y=2； h[1].x＝3；h[1].y＝4； h[0].p=&h[1]；h[1].p＝h； printf("%d%d/n" h[0].p)-＞x，(h[1].p)-＞y)； }
A. 12
B. 23
C. 14
D. 32

[单项选择]The dairy farming industry in this country remains too ______ on government subsidies


A. reliant
B. architectural
C. assertive
D. significant

[单项选择]Farming in Middle West is favorable chiefly because__________.

[单项选择]Farming emerged as a survival strategy because man had been obliged ______.
A. to give up his former way of life
B. to leave the coastal areas
C. to follow the ever-shifting vegetation
D. to abandon his original settlement

[单项选择]According to this passage, why the farming activities can affect the animals


A. By forcing them farming.
B. By affecting the quality of soils.
C. By adding chemicals and pollute the waterways.
D. By affecting the environments they live in.

[单项选择]According to this passage, farming is difficult in New England because ______.
A. the winter is very long there
B. the farms are very old
C. the soil is rocky and thin
D. there is not enough machinery for farming

[单项选择]The use of chemicals and fertilizers in farming is meant to increase ______.
A. the quantity of foods
B. the quality of foods
C. either the quantity or the quality of foods
D. the quality as well as the quantity

[单项选择]Scientists are responsible for people who hold harmful beliefs about human nature because ______.


A. the theories of scientists are used as justification for such harmful beliefs
B. only through science can these people be refuted
C. they have an obligation to correct their mistakes
D. scientists are the ones who know the true nature of humankind