Water hyacinth

题目与答案

1. 21-22 Which TWO problems are caused by water hyacinth?
   • plants and fish are poisoned.
   • farmers cannot fish.
   • the dam`s structure is damaged.
   • electricity production is affected.

   答案：farmers cannot fish.,electricity production is affected.

   原文定位：Farmers cannot travel in boats on the water and thus cannot fish in it;Dams often cease to function;severely restricting electricity generation

   同义替换：「production」↔「generation」，「affected」↔「restricted」

2. 23 Where was water hyacinth originally from?
   • Latin America
   • Africa
   • Europe

   答案：Latin America

   原文定位：The water hyacinth is native to the Amazon basin in Latin America

   同义替换：「originally」↔「native」

3. 24 What is the primary cause of the decrease in nutrients from the soil?
   • soil erosion
   • a change of rainfall
   • loss or trees

   答案：loss or trees

   原文定位：The main reason for soil nutrient loss is that local residents cut down trees

   同义替换：「primary cause」↔「main reason」，「decrease」↔「loss」，「loss of trees」↔「deforestation」

4. 25 When will the biological solution bring risks to the environment?
   • immediately
   • 6 months later
   • many years later

   答案：many years later

   原文定位：The side effects of this method on local ecology will remain unforeseen for years because it takes time for this external insect species to reach a density sufficient enough to affect ecological development

   同义替换：「bring risks to the environment」↔「unforeseen effects」，「solution」↔「control」

5. 26 What does John say about the mechanical solution?
   • ineffective
   • dangerous
   • expensive

   答案：expensive

   原文定位：Well, the mechanical removal of water hyacinth is seen as the best short-term solution. This option includes harvesting plants and inside cutting. This method can immediately open physical space for fish and boat traffic. It is, however, inefficient for workers to process extensive areas and costly to use large cutting and dredging equipment

   同义替换：「expensive」↔「costly」

6. dried water hyacinth
   • can reduce the effect of global warming.
   • can be used an alternative energy resource.
   • can make quick profits.
   • can produce materials for plants to grow in.
   • can be good for human health.
   • can produce fertilizer.

   答案：can produce materials for plants to grow in.

   原文定位：The mixture can be used as alternative soil rather than fertilizer. It can grow crops with increased yield

7. mushroom farmers
   • can reduce the effect of global warming.
   • can be used an alternative energy resource.
   • can make quick profits.
   • can produce materials for plants to grow in.
   • can be good for human health.
   • can produce fertilizer.

   答案：can make quick profits.

   原文定位：Mushroom farmers can benefit from water hyacinth as well. Using the mixture mentioned earlier, mushrooms generally grow much faster so that farmers can harvest mushrooms sooner, which enables them to make money faster

   同义替换：「make quick profits」↔「make money faster」

8. oyster and straw mushrooms
   • can reduce the effect of global warming.
   • can be used an alternative energy resource.
   • can make quick profits.
   • can produce materials for plants to grow in.
   • can be good for human health.
   • can produce fertilizer.

   答案：can be good for human health.

   原文定位：These mushrooms provide sufficient nutritional values, including minerals and high quality protein, which are essential to people's level of fitness

   同义替换：「good for human health」↔「nutritional values」

9. cows
   • can reduce the effect of global warming.
   • can be used an alternative energy resource.
   • can make quick profits.
   • can produce materials for plants to grow in.
   • can be good for human health.
   • can produce fertilizer.

   答案：can produce fertilizer.

   原文定位：people feed cows using chopped water hyacinth mixed with other vegetables. Then the waste from the cows is treated to produce methane gas, which can be used as fuel for cooking, lighting, or powering an engine