Delta备考策略与模拟试题 Test 1 口语 Question 4 重新选题

阅读材料

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Homeostasis

Homeostasis is the tendency toward balance. In zoology, homeostasis is an animal’s ability to maintain body equilibrium by adjusting its physiological processes. It is the body’s continuous balancing and re-balancing of the processes that maintain stability and restore the body’s normal state when it has been disturbed. Homeostatic systems keep an animal’s internal environment within acceptable limits, even though the external environment may change. Homeostatic systems protect an animal’s body from harmful changes, such as changes in temperature or water level.

听力材料

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口语题目

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The professor describes the large ears of a rabbit. Explain how the rabbit’s ears are used in homeostasis.

答题辅导

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1、题目关键词：explain,rabbit’s ears, homeostasis

2、答题要领：

(1)summarize the concept of homeostasis.

(2)use the example of the rabbit to explain.

3、阅读材料要点：

(1)Homeostasis is an animal’s ability to maintain body equilibrium by adjusting its physiological processes.

(2)Homeostatic systems protect an animal’s body from harmful changes.

4、听力材料要点：

(1)The rabbit can regulate the amount of blood flowing through blood vessels of its ears in order to maintain the stability of body temperature.

(2)When the blood vessels in the ears expand, more heat is lost through the ear skin surface, so the body temperature can go down. On the other hand, when the blood vessels constrict and send the blood back to deeper parts of the body to prevent heat loss.

5、模板：

(1)In this set of materials, the reading passage is (the title of the reading passage) and the listening material is a lecture on this topic.

(2)The reading material mainly introduces ...

(3)In the listening material, the professor discusses ...

(4)First,... Second,...