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Everything that humans hear is in the form of waves (波).Just as the eye sees light wares in the form of colors, the ear and the eye Curs these different waves into signals that the brain (大腦) can make sense of.

The ears and brain have an Amazing amities to recognize(識別)particular sounds. For example, a mother often can tell when her baby is crying even if there are other crying babies in the same room. This is because the sound of her baby’s cry has special meaning to her and the brain has recorded is importance.

The ability to recognize sounds improves with experiences. As the brain receives information about sounds from day to day, it stores the information in its memory. When the brain hears new sounds, it gives meaning to them based on the information already in the memory. This is why certain words or songs can make a person happy. Often it is not the words or songs themselves that cause this feeling. The sounds are connected to happy memories for that person.

After hearing process controlled by the brain is to decide where a sound is coming from. One ear is usually closer to the source (來源) of a sound than the other ear is. Sound waves are stronger when they reach the ear that is closer. They also reach the closer ear first. The brain recognizes these differences and uses them to decide the location of the source of the sound.

1.Which of the following shows the normal hearing process of a mother hearing her baby crying?

a. The ears receive the sound waves.

b. The mother recognizes her baby’s cry.

c. The ears turn the sound waves into signals.

d. The baby’s cry ravels in the form of sound waves

e. The brain connects the signals to the information in me memory.

A.d-a-c-b-e          B.d-a-c-e-b          C.a-d-c-b-e          D.a-d-c-e-b

2. Certain words or songs can change tarpon’s moods mainly because of his         .

A.lifestyle           B.personality        C.experiences       D.hobbies

3.According to the last paragraph, It will be the most difficult for a person who has lost the hearing in one ear to tell         .

A.where the source of a sound is             B.how loud a sound is

C.when a sound starts to appear              D.what makes a sound

4.What is the best title for this passage?

A.Human Brain’s Amazing Facts

B.Human Hearing Characteristics

C.How to improve Hearing

D.How Do Humans Hear

 

【答案】

1.B

2.C

3.A

4.D

【解析】短文大意:這篇短文中作者以母親聽到嬰兒的哭聲為例,介紹了人們是如何聽到聲音的科學原理,并講述了耳朵辨別方位的科學道理.

1.根據短文一三段描述,可知母親只聽到嬰兒的哭聲,首先要滿足聲音以聲波的形式傳播,然后耳朵接收到這種聲波,然后耳朵把這些聲波轉換成信號,大腦把這些信號同記憶中的信息聯系起來,最后母親辨別出嬰兒的哭聲.故選B..

2.根據第三段This is why certain words or songs can make a person happy. Often it is not the words or songs themselves that cause this feeling. The sounds are connected to happy memories for that person.描述,可知與人們的經驗有關.故選C.

3.根據最后一段描述,可知兩只耳朵通過距離聲源的遠近來辨別聲音發出的方向,所以當一只耳朵失去聽力之后,他無法辨別聲音發出的方向.故選A.

4.這篇短文中作者主要分析了耳朵是如何聽到聲音的科學道理.故選D.

 

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