15．While learning the science lessons，I used to get a doubt--why ear，nose，tongue and eyes should be called as special senses？The basic reason is that these are the channels through which we maintain contact with the surroundings．Though apparently it may feel like these are individual sensory organs，they do show some connectivity．Interestingly，our hearing is less sharp after we eat a heavy food．Isn't it good for a sound nap after a stomach-full meal？That does not mean we go deaf after a meal，but the hearing pitch（強(qiáng)度）does change after a heavy meal．
We usually give credit of the taste to our tongue，but do you know that unless saliva（唾液）dissolves something，our tongue cannot recognize the taste of the food eaten．Taste is nothing but the food chemicals dissolved in the saliva being sensed by the taste buds（味蕾）present on the tongue．Try to dry off your tongue and mouth with a tissue paper and then taste something．
Women are much better smellers than men．They are born with this characteristic ability and can correctly recognize the exact fragrance of the sample．We all can store almost 50，000 different smells，which are strongly tied to the memories．
Pupils（瞳孔）do not respond to light alone，but to the slightest bit of noise around too．Thus surgeons，watchmakers and those professionals who have to perform a much delicate job do prefer to have a sound-free environment．Even a small noise can enlarge their pupils，change the focus and make their vision less clear．
Each and every one of us has a particular or individualistic or characteristic smell，which is unique to us，except the twins．This smell is very subtle yet can be sensed even by a newborn．It may be due to this smell that the newborn recognizes the presence of his parents around．
72．What may happen after you have had a rich lunch？C
A．Your eyes become weak and can not see well．
B．You may feel energetic and fresh．
C．Your hearing pitch may be decreased．
D．Your tongue may lose the function of taste．
73．What does the author mean by the underlined sentence in paragraph 2？B
A．Our tongues can't be dried while eating something．
B．If your tongue is dried without any saliva on it，it will not work．
C．A tissue paper is the only thing that can be used to dry our tongues．
D．If your tongue is dried with a tissue paper，it may work as well as before．
74．What makes each person different from anyone else except twins according to the passage？C
A．The number of sensory organs．
B．The functions of sensory organs．
C．The particular smell of a person．
D．The style of one's behavior．
75．Which of the following may be the best title of this passage？B
A．The Sensitivity of Sensory Organs
B．The Functions and Connections of Sensory Organs
C．A Newborn's Sensory Organs
D．Different Senses Between Men and Woman．
分析 本文是一篇科普類文章，當(dāng)上科學(xué)課時(shí)，我有個(gè)疑問(wèn)：為什么耳朵，鼻子，舌頭，和眼睛會(huì)有特殊的感覺(jué)．最根本的原因是，這些是我們與周圍的環(huán)境保持聯(lián)系的渠道．本文就此展開(kāi)談?wù)摚v述了感覺(jué)器官-聽(tīng)覺(jué)，味覺(jué)，嗅覺(jué)，視覺(jué)等的相互聯(lián)系和各自的功能．
解答 72．答案：C．細(xì)節(jié)理解題．根據(jù)第一段倒數(shù)一、二句Interestingly，our hearing is less sharp after we eat a heavy food．Isn't it good for a sound nap after a stomach-full meal？That does not mean we go deaf after a meal，but the hearing pitch（強(qiáng)度）does change after a heavy meal．可知，吃飽后人的聽(tīng)覺(jué)會(huì)降低．故選C．
73．答案：B．細(xì)節(jié)理解題．根據(jù)第二段內(nèi)容可知，舌頭必須在唾液的配合下才能分辨味道，如果用紙把舌頭擦干，舌頭的味覺(jué)功能就會(huì)喪失．故選B．
74．答案：C．細(xì)節(jié)理解題．根據(jù)最后一段Each and every one of us has a particular or individualistic or characteristic smell，which is unique to us，except the twins．可知，作者認(rèn)為我們每個(gè)人身上都有獨(dú)特的味道，通過(guò)這個(gè)味道我們就可以辨別我們所熟悉的人．故選C．
75．答案：B．主旨大意題．縱觀全文和第一段的句子：Though apparently it may feel like these are individual sensory organs，they do show some connectivity．可知，這篇文章講的是感覺(jué)器官的聯(lián)系和功能．故選B．
點(diǎn)評(píng) 本文是一篇科普類文章，題目涉及多道細(xì)節(jié)理解題，主旨大意題，做題時(shí)應(yīng)結(jié)合文章上下文內(nèi)容，仔細(xì)閱讀原文，并根據(jù)所給選項(xiàng)的含義進(jìn)行分析，從而得出正確答案．切記胡亂猜測(cè)，一定要做到有理有據(jù)．
