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The Animals in Desert Some desert animals can survive the very strong summer heat and dryness because they have very unusual
The Animals in Desert Some desert animals can survive the very strong summer heat and dryness because they have very unusual
admin
2009-06-15
44
问题
The Animals in Desert Some desert animals can survive the very strong summer heat and dryness because they have very unusual characteristics. The camel, for example, can(1)an increase in the temperature of its body and its blood of 9~℃. In addition, it can drink an enormous(2)water at one time, then store sufficient water in its red blood cells and other parts of its body to supply its needs for two weeks or more. The kangaroo rat, on the other hand,(3)all the water it needs from water that it produces during respiration. However, most animals need to(4)a fairly constant body temperature, and will die if it rises more than 5 ℃.(5), they need to find some way to avoid the strong sunrays. Nor can many animals either store or produce water in their bodies, as the camel and kangaroo rat(6). So they must find ways to(7)water loss from their bodies to the lowest degree. Because very few desert animals can survive the strong rays, the temperature, and the evaporation rate(8)a typical summer’s day, most of them are active during the night. Only(9)the sun has set does the desert come fully to life. The night is relatively cool, and the darkness provides(10), not only from the sun, but also from other animals and from the birds. So the coming of darkness is the signal(11)the large majority of animals and insects to continue their search for water and food. When morning comes, most of them seek(12)again. Many go underground; nearly all find somewhere shady where they can avoid the sunrays. For many kinds of insects, living in the desert is(13)than for animals. Like many desert plants, they have a waterproof skin which(14)water loss by evaporation. In addition, some insects spend all or most of their life below ground. Here, for most of the year at least, there is(15)wetness, and it is generally cooler than on the surface.
选项
A、after
B、since
C、until
D、before
答案
A
解析
该句说“只有当太阳落山……沙漠才能完全恢复生机”。After是“之后”,而until引导的从句中的谓语动词如果是非延续性的,如句中的com(恢复),则要用not…until的结构,而原句不是这样的结构。
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本试题收录于:
职称英语理工类B级题库职称英语分类
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