African clawed frog

文章大意

这篇雅思听力Part4介绍非洲爪蟾（Xenopus laevis），一种终生水生的两栖动物。它因后足有三只短爪得名，皮肤光滑无舌无外耳，靠黏液保护皮肤；雌蛙体型约为雄蛙两倍。它适应力强，能生活在静水、咸水甚至冰川湖，旱季会钻入泥中存活一年以上。

题目与答案

1. Description:

   ·They have no tongue or external ears.

   ·Their skin is 31_____ .

   答案：smooth

   原文定位：African clawed frogs have smooth skin, unlike the toad, whose skin always has a rough texture

   同义替换：「rough texture」↔「smooth」

2. ·The mucus on their skin is for 32_____ .

   答案：protection

   原文定位：The body of African clawed frogs is covered with mucus, which can give their sensitive skin protection

3. ·Male frogs are 33_____ the size of female frogs.

   答案：half

   原文定位：Generally, male frogs are about half as big as females

   同义替换：「half as big as」↔「half the size of」

4. Habitats:

   ·They prefer 34_____ water.

   答案：still

   原文定位：they particularly like still water instead of fast-flowing streams

5. ·They live in oases or glacier-covered lakes.

   ·They live in a condition with a high level of 35_____ .

   答案：salt

   原文定位：African clawed frogs are highly adaptable to changes in the environment around them, whether in oases or glacier-covered lakes. Besides, they can even survive in water with high salt levels

   同义替换：「condition」↔「environment」

6. ·In the condition of drought, they can survive in 36_____ for a long period of time.

   答案：mud

   原文定位：In dry weather, African clawed frogs always burrow themselves into mud, where they can survive for more than a year

   同义替换：「drought」↔「dry weather」，「survive in」↔「burrow into」，「a long period of time」↔「more than a year」

7. Diet:

   ·They use the sense of 37_____ to capture food.

   答案：smell

   原文定位：African clawed frogs depend on the sense of smell to detect their prey

   同义替换：「capture food」↔「detect their prey」，「depend on」↔「use」

8. ·They use their claws to tear apart ample food.

   ·They use their front feet and a unique 38_____ system when feeding.

   答案：pump

   原文定位：a distinctive pump system is used to draw or suck food in their mouths

   同义替换：「unique」↔「distinctive」，「feeding」↔「eating」

9. Other information:

   ·People in some states of the USA regard them as 39_____ .

   答案：pest

   原文定位：where African clawed frogs have been seen as a type of pest

   同义替换：「regard」↔「see」，「invasive species」↔「pest」

10. ·The mucus on their skin has 40_____ properties.

    答案：antibiotic

    原文定位：the skin of African clawed frogs is covered with mucus, which has properties of antibiotic