Desertification

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题目与答案

1. Desertification poses a threat to people worldwide.
   • A
   • B
   • C
   • D
   • E
   • F

   答案：E

   原文定位：but desertification presently affects millions of people in almost every continent

   同义替换：「poses a threat to」↔「affects」，「worldwide」↔「almost every continent」

2. It is difficult to describe the process of desertification.
   • A
   • B
   • C
   • D
   • E
   • F

   答案：D

   原文定位：Desertification does not occur in linear, easily mappable patterns. Deserts advance erratically, forming patches on their borders

   同义替换：「difficult to describe」↔「advance erratically」，「process」↔「patterns」

3. Desertification may alter local climates.
   • A
   • B
   • C
   • D
   • E
   • F

   答案：C

   原文定位：Desertification may intensify a general climatic trend toward greater aridity, or it may initiate a change in local climate

   同义替换：「alter」↔「change」

4. People have misconceptions regarding desertification origins.
   • A
   • B
   • C
   • D
   • E
   • F

   答案：F

   原文定位：It is a misconception that drought cause desertification

   同义替换：「origins」↔「cause」

5. It is hard to notice desertification in its early stages.
   • A
   • B
   • C
   • D
   • E
   • F

   答案：D

   原文定位：Unfortunately, an area undergoing desertification is brought to public attention only after the process is well underway

   同义替换：「notice」↔「public attention」

6. Straw grids diminish the swiftness of the surface wind.
   • A
   • B
   • C
   • D
   • E
   • F

   答案：G

   原文定位：Placement of straw grids;will also decrease the surface wind velocity

   同义替换：「diminish」↔「decrease」，「swiftness」↔「velocity」

7. 34 All desert borders are difficult to define.
   • YES
   • NO
   • NOT GIVEN

   答案：NO

   原文定位：In some regions, deserts are separated sharply from surrounding, less arid areas by mountains and other contrasting landforms that reflect basic structural differences in the regional geology. In other areas, desert fringes form a gradual transition from a dry to a more humid environment, making it more difficult to define the desert border

   同义替换：「All desert borders」↔「in some regions」

8. 35 Desertification is a reversible process.
   • YES
   • NO
   • NOT GIVEN

   答案：NOT GIVEN

   原文定位：Scientists still question whether desertification;is permanent or how and when it can be halted or reversed

   同义替换：「reversible process」↔「can be halted or reversed」

9. 36 Part of the Great Plains did not become a so-called “Dust Bowl” until almost 1950.
   • YES
   • NO
   • NOT GIVEN

   答案：NO

   原文定位：Desertification became well known in the 1930’s when part of the Great Plains in the United States turned into the “Dust Bowl” as a result of drought and poor practices in farming, although the term itself was not used until almost 1950

10. 37 Nomads cannot get away from the desert because of their current land-use methods.
    • YES
    • NO
    • NOT GIVEN

    答案：YES

    原文定位：Nomads are trying to escape the desert, but because of their land-use practices, they are bringing the desert with them

    同义替换：「get away from」↔「trying to escape」，「methods」↔「practices」

11. Tree fences or grass belts planted inside oases can catch sand in the wind and 38_____ these areas as well.

    答案：stabilize

    原文定位：Small plots of trees may also be scattered inside oases to stabilize the area

    同义替换：「as well」↔「also」

12. The “Green Wall” is an example. Water resource management and prevention of 39_____ are also effective in protecting lands.

    答案：salinization

    原文定位：More efficient use of existing water resources and control of salinization are other effective tools for improving arid lands

    同义替换：「prevention」↔「control」，「management」↔「use」，「protecting」↔「improving」

13. Scientists are trying to find 40_____ to protect the vulnerable soil.

    答案：proper crop rotation

    原文定位：Research on the reclamation of deserts also is focusing on discovering proper crop rotation to protect the fragile soil

    同义替换：「trying to find」↔「focusing on discovering」，「vulnerable」↔「fragile」