The white-lipped grove snail

文章大意

雅思听力Part4介绍白唇树蜗牛（white-lipped grove snail）：属软体动物，壳有白色唇边和条纹，颜色从淡粉到黄，吃腐烂植物，见于花园等城乡环境，需从土壤摄取钙。它只分布在爱尔兰和法国西班牙边境的比利牛斯山，两地相隔数百英里且中间无记录，诺丁汉大学研究者正通过“超级实验室”招募志愿者核查这一奇怪分布。

题目与答案

1. The White-lipped Grove Snail

   Background

   ·It has a distinctive shell pattern

   ·Its main diet is decaying 31_____ .

   答案：plants

   原文定位：Its principal source of nutrition is plants, which are either already dead or in the process of rotting

   同义替换：「main diet」↔「principal source of nutrition」，「decaying」↔「dead or in the process of rotting」

2. ·To obtain minerals, it also eats 32_____ .

   答案：soil

   原文定位：To get these, it frequently consumes soil, which contains these minerals

   同义替换：「obtain」↔「get」，「eats」↔「consumes」

3. University of Nottingham study

   ·Via the internet, volunteers were recruited for the 33_____ of snails

   ·The snails' genetic materials were studied.

   答案：collection

   原文定位：Via the Internet, they set up what is known as a mega lab, recruiting numerous volunteers across Europe to be responsible for the collection of snail specimens

   同义替换：「were recruited for」↔「to be responsible for」

4. Findings and theories

   ·Convergent evolution' is very unlikely.

   ·Natural migration is impossible because these snails do not like 34_____ .

   答案：salt

   原文定位：This was ruled out because they hate salt and simply wouldn't have embarked on the journey across the sea

   同义替换：「impossible」↔「ruled out」，「do not like」↔「hate」

5. ·In the Pyrenees, many shells have been found in 35_____ .

   答案：cave

   原文定位：mounds of white-lipped snail shells had been thrown away in caves

   同义替换：「found in」↔「thrown away in」，「many」↔「mounds」

6. ·This is evidence that the snails were used as 36_____ .

   答案：food

   原文定位：This led to the conclusion that the snails must have been used over a long period by these Stone Age humans as food

   同义替换：「evidence」↔「conclusion」

7. ·There is archaeological proof of 37_____ between the two areas.

   答案：trade

   原文定位：they found evidence that very early on, there had been trade between the people living in these widely separated areas

   同义替换：「proof」↔「evidence」

8. ·The snails were most possibly carried in 38_____ .

   答案：boats

   原文定位：The research team have tentatively concluded that the most likely way in which the snails traveled from east to west was in boats

   同义替换：「possibly」↔「likely」，「carried」↔「traveled」

9. Further work

   ·A wider 39_____ of the snails is required for the study.

   答案：sample

   原文定位：They recognize, for example, that they need to look at a broader sample of the snails

   同义替换：「wider」↔「broader」，「required」↔「need to look at」

10. · One other organism will be investigated: a particular type of 40_____ .

    答案：tree

    原文定位：This is a species of tree which they want to look at in more detail

    同义替换：「particular」↔「species」