Question

Different kinds of soil conservation methods are used by farmers to protect their land from damage by farming and the forces of nature. One important form of soil conservation is the use of windbreaks.

Windbreaks are barriers (屏障) formed by trees and other plants with many leaves. Farmers plant them in lines around their fields. Windbreaks stop the wind from blowing soil away. They also keep the wind from destroying or damaging crops. They are very important for growing grains, such as wheat.

There have been studies done on windbreaks in parts of West Africa, for example. They found that grain harvests can be twenty percent higher in fields protected by windbreaks compared to fields without such protection.

However, windbreaks seem to work best when they allow a little wind to pass through. If the wall of trees and plants stops wind completely, then violent air motions will take place close to the ground. These motions will lift soil into the air where it will be blown away. For this reason, a windbreak is best if it has only sixty to eighty percent of the trees and plants needed to make a solid line.

There should be at least two lines in each windbreak. One line should be large trees. The second line, right next to it, can be shorter trees and other plants with leaves. Locally grown trees and plants are best for windbreaks.

1.What is a windbreak according to the passage?

A. A windbreak is a concrete wall to prevent the strong winds.

B. A windbreak is a wood with different kinds of trees.

C. A windbreak is a wall of trees to hold soil in place.

D. A windbreak is a wall of wind to fight wind from the opposite way.

2.When can windbreaks be most effective?

A. The trees are planted one by one.

B. The trees and plants grow in a line.

C. The trees grow as high as they can.

D. Windbreaks allow a little wind to blow through.

3.Which of the following statements is NOT true?

A. A windbreak is one of the best forms of soil conversation.

B. A windbreak is very good for growing grains such as wheat.

C. One line of trees is enough for soil protection.

D. Locally grown trees and plants are the top choice for a windbreak.

Answer

1.C

2.D

3.C

【解析】

试题分析：本文介绍了风障的概念，指出设置风障是保护农田、防止水土流失的好方法。

1.C 推理判断题。根据第二段中Windbreaks are barriers (屏障) formed by trees. 和 Windbreaks stop the wind from blowing soil away 可总结出，风障是一种由树构成的保护农田、防止水土流失的屏障，故答案为C。

2.D 细节理解题。根据第四段第一句话windbreaks seem to work best when they allow a little wind to pass through.可知，答案为D。

3.C 细节理解题。根据第一段最后一句One important form of soil conservation is the use of windbreaks 可推断，风障是保护土壤最好的方法之一，故A描述正确；根据第二段最后一句They are very important for growing grains, such as wheat.直接判断B描述准确；由最后一段第一句There should be at least two lines in each windbreak 看出，每段风障至少需要两排树，判断C描述错误；最后一段最后一句Locally grown trees and plants are best for windbreaks直接看出，D描述正确，故答案为C。

【名师点睛】

推理判断题的解题方法：

推理判断题不仅要求考生读懂文章中的每个句子的意思还要推理它们之间的关系，结合自己的生活常识和经验，再通过逻辑推理和判断，理解文章的言外之意，从而揭示文章的深层涵义。

下面介绍一些词义猜测题的解题技巧。

1.根据定义或上下文解释进行猜测

2.根据同位关系进行猜测

阅读中出现的难词有时后面紧跟一个同位语，对前面的词进行解释，这时可利用同位关系对前面或后面的词义或句意进行猜测。

4.根据转折或对比关系进行猜测

根据上下句的连接词，如but, however, otherwise等就可以看到前后句在意义上的差别，从而依据某一句的含义，来确定另一句的含义。

考点：环保类文章阅读。