阅读理解。
How to Build a Windbreak to Protect Soil
Farmers use different kinds of soil conservation methods to protect their land against damage from farming
and the forces of nature. One important form of soil conservation is the use of windbreaks.
Windbreaks are barriers (栅栏) 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. Studies in parts of West Africa, for example, found that grain
harvests can be twenty percent higher in fields protected by windbreaks. This was compared to fields without
such protection.
Windbreaks can help protect a farmer's land. However, windbreaks seem to work best when they allow a
little wind to pass through. If the wall of trees and plants blocks the wind completely, then violent air motions
will take place close to the ground. These motions cause the soil to lift up 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.
An easy rule to remember is that windbreaks can protect areas up to ten times the height of the tallest trees
in the windbreak.
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.
Windbreaks not only protect land and crops from the wind. They can also provide wood products. These
include wood for fuel and longer pieces for making fences.
1. What does the underlined word "conservation" mean in the passage? [ ]
A. Damage.
B. Protection.
C. Force.
D. Harvest.
2. What do farmers use windbreaks for? [ ]
A. To keep animals from getting into the fields.
B. To keep water in their fields.
C. To prevent their soil blowing away and wind destroying the crops.
D. To get more trees.
3. According to the passage what is a best windbreak? [ ]
A. One with no breaks between trees or plants.
B. One with plants which have many leaves.
C. One with certain breaks between trees and plants.
D. One with as many trees or plants as possible.
4. What's the purpose of the writer in writing the passage? [ ]
A. To tell us why farmers build windbreaks around the fields.
B. To tell us how to get a higher harvest.
C. To let us know there are usually windbreaks around the fields.
D. To tell us how important it is to keep soil and crops.
(2)2010年度未经审计的产成品成本构成明细资料与2009年度相关资料：
要求：根据资料一，结合资料二，必要时运用分析程序，指出资料(一)中所列各种情况是否意味着X公司存在重大错报风险；如存在，请指出重大错报风险属于财务报表层次还是认定层次；并简要说明与重大错报风险相关的管理层理由(或动机)。请将答案填入下列表格中。
