单选题
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 9°C 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 produces when it breathes. However, most animals need to maintain a fairly constant body temperature, and will die if it rises more than 5°C. 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's 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 morning comes, most of them seek shelter again: many go underground; nearly all find some dark and cool places where they, can keep away from the sun's heat. For many kinds of insects, living in the desert is easier than for animals. Like many desert plant's, they have a waterproof skin which prevents water loss because of the high temperature. In addition, some spend all or most of their life below ground. Here, for most of the year at least, it is moist, 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.
单选题
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
【正确答案】
C
【答案解析】由题干关键词camel定位到第一段第二句The camel，for example，can experience and bear an increase in the temperature of its body and its blood of 9°C without anything bad happening to it.说明沙漠骆驼能忍受体温上升高达9℃的剧烈变化，却对身体健康无碍。因此选[C]，同时排除 [B]。[A]和[D]原文未提及。
单选题
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 10t of water at a time
【正确答案】
A
【答案解析】根据题干关键词kangaroo rat定位到第一段第四句The kangaroo rat，on the other hand，gets all the water it needs from water that it produces when it breathes．说明更格卢鼠通过呼吸汲取身体所需的水分。因此选[A]。[B]体内的某些器官能储藏水，[D]一次能饮很多水，沙漠骆驼有这两种本领，但不是更格卢鼠；[C]原文未提及。
单选题
The desert is full of activities in summer nights because ______. A. it is cooler and safer for most animals at nightB. animals can find food in the dark C. it is easy for animals to find water at night D. animals cannot sleep at night
【正确答案】
A
【答案解析】由题干关键词activities和in summer nights定位到第一段最后五句话，倒数第三、四句 Only after the sun has set does the desert come fully to life．The night is relatively cool，and the dark ness provides protection，not only from the sun，but also from other animals and from the birds．说明夏天太阳落山以后沙漠完全恢复了生气，因为夜晚相对凉爽，黑暗能提供庇护，使动物和昆虫免受太阳的暴晒，不会受到其他动物和鸟类的攻击。据此选[A]。[B]、[C]、[D]与文意不符，故排除。
单选题
It is easy for many kinds of insects to live in the desert because ______. A. They only need a little food to survive B. they are not afraid of the heat C. They are too small to be attacked by other animals D. they have a skin which is against water
【正确答案】
D
【答案解析】由题干关键词many kinds of insects定位到最后一段第一、二句Like many desert plants， they have a waterproof skin which prevents water loss because of the high temperature．许多昆虫在沙漠中容易生存下来的原因是它们有一层能防水的皮肤，可以阻止因高温而蒸发体内水分。因此选[D]。[A]、[B]、[C]与文意不符，故排除。
单选题
The best title for the text would be ______. A. Desert Animals and Insects B. Kangaroo Rat and Camel C. The Climate in Desert D. Desert Plants