Everything that humans hear is in the form of waves (波).Just as the eye sees light wares i

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 (大脑) can make sense of.
The ears and brain have an Amazing amities to recognize（识别）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 (来源) 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.
【小题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-eB．d-a-c-e-bC．a-d-c-b-eD．a-d-c-e-b【小题2】 Certain words or songs can change tarpon’s moods mainly because of his .A．lifestyle B．personalityC．experiences D．hobbies【小题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 isB．how loud a sound isC．when a sound starts to appearD．what makes a sound【小题4】What is the best title for this passage?A．Human Brain’s Amazing FactsB．Human Hearing CharacteristicsC．How to improve HearingD．How Do Humans HearB

(答案→)B 解析：短文大意:这篇短文中作者以母亲听到婴儿的哭声为例,介绍了人们是如何听到声音的科学原理,并讲述了耳朵辨别方位的科学道理.【小题1】根据短文一三段描述,可知母亲只听到婴儿的哭声,首先要满足声音以声波的形式传播,然后耳朵接收到这种声波,然后耳朵把这些声波转换成信号,大脑把这些信号同记忆中的信息联系起来,最后母亲辨别出婴儿的哭声.故选B..【小题2】根据第三段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,可知与人们的经验有关.故选C.【小题3】根据最后一段描述,可知两只耳朵通过距离声源的远近来辨别声音发出的方向,所以当一只耳朵失去听力之后,他无法辨别声音发出的方向.故选A.【小题4】这篇短文中作者主要分析了耳朵是如何听到声音的科学道理.故选D.

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