Delta冲刺试题 Test 3 口语 Question 4 重新选题

阅读材料

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Sensory Receptors

Sensations, or nerve impulses, begin with the excitation of sensory receptors, structures that detect changes in an animal’s external and internal environment. Some sensory receptors are stimulated by physical bending or stretching caused by forms of mechanical energy such as pressure, touch and motion. A common type of sensory receptor that detects motion is the hair cell. When hairs bend in on direction, they stretch the hair cell’s membrane, sending a nerve impulse to the sensory areas of the brain. Hair cells can respond to the direction of motion as well as to its strength and speed.

听力材料

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口语题目

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Describe the whiskers of a cat, and explain how the whiskers function as sensory receptors.

答题辅导

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1、题目关键词：

2、答题要领：

(1)briefly summarize the concept of sensory receptor.

(2)describe the whiskers of a cat and explain the whiskers function.

3、阅读材料要点：

(1)Sensory receptors detect changes in an animal's external and internal environment and some of them are stimulated by physical bending or stretching.

(2)A common type of sensory receptor that detects motion is the hair cell.

4、听力材料要点：

(1)The cats' whiskers are long, stiff, highly touch-sensitive hairs. Cats generally have about 12 whiskers on their faces. They are more than twice as thick as the rest of the hairs and extend three times deeper into the skin.

(2)Whiskers can detect slight motion. Cats rely heavily on their whiskers when the light is dim.

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,...