Question

 Some desert animals can survive the summer heat and dryness because they are very unusual. The camel, for example, can experience and bear an increase in the temperature of its body and its blood of 9t without anything bad happening to it. In addition, it can drink a lot of water at one time;then store enough water in parts of its body to supply its needs for two weeks or more. The kangaroo rat,on the other hand,gets all the water it needs from water that it pro?duces when it breathes. However, most animals need to maintain a fairly constant body temper?ature,and will die if it rises more than 5^. Therefore, they need to find some way to stay away from the heat of the summer sun. Nor can many animals either store or produce water in their bodies, as the camel and kangaroo rat can. So they must find ways to keep their bodies from losing water because of the heat.

  Because very few desert animals can survive the high temperature of a typical summer day， most of them are active only in the night. Only after the sun has set does the desert come fully to life. The night is relatively cool,and the darkness provides protection, not only from the sun,but also from other animals and from the birds. So the coming of darkness is the signal for the large majority of animals and insects to start again their search for water and food. When morn?ing comes，most of them seek shelter again：many go underground;nearly all find some dark and cool place where they can keep away from the sun's heat.

  For many species of insects, living in the desert is easier than for animals. Like many des?ert plants，they have a waterproof skin which prevents water loss because of the high tempera?ture. In addition, some species spend all or most of their life below ground. Here,for most of the year at least, there is some moisture, and it is generally cooler than on the surface. In the case of ants，only adults leave the underground nests，and they do so only to gather food or to defend the nest against attack.

(   ) 1. Compared with other desert animals，the camel can bear      

A.     a very low body temperature

B.     only a little change in body temperature

C.     a big increase in body temperature

D.     a constant change in body temperature

(   ) 2. The kangaroo rat is different from other animals in that      

A.     it can produce water through breathing

B.     it can store water in parts of its body

C.     it can maintain different body temperatures

D.     it can drink a lot of water at a time

(   ) 3. Why is it easy for many species of insects to live in the desert?

A.     Because it is not difficult for them to survive there.

B.     Because they are not afraid of the heat.

C.     Because it is not difficult for them to find food there.

D.     Because they have a waterproof skin.

(   ) 4. Why is the desert full of activity in summer nights?

A.     Because it is cooler and safer for most animals.

B.     Because animals can find food in the dark.

C.     Because it is easy to find water at night.

D.     Because animals cannot sleep at night.

Answer 1

1-4 CADA  

A篇讲述了沙漠中不同种类动物的耐热能力以及它们的生活习惯和导致这种习惯的原因。

1. C细节理解题由文章第一段第二句话"The camel,for example, can experience and bear an increase in the temperature of its body and its blood of 9t without anything bad hap?pening to it... However,most animals need to maintain a fairly constant body temperature, and will die if it rises more than 5t."可知，骆驼更能适应体温的升高。

2. A细节理解题文章第一段中提到"The kangaroo rat,on the other hand,get all the water it needs from water that it produces when it breathes."，由此可知，"kangaroo rat"能够通过呼吸造水。

3. D细节理解题由文章最后一段"Like many desert plants，they have a waterproof skin which prevents water loss because of the high temperature."得知，其原因是他们有不透水的外壳。

4. A细节理解题文中第二段第三行提到"The night is relatively cool, and the darkness provides protection"，即夜晚的降临对生活在沙漠的动物来说，既较凉爽又较安全。