3.Science can't explain the power of pets,but many studies have shown that the company of pets can help lower blood pressure (血壓) and raise chances of recovering from a heart attack,reduce loneliness and spread all-round good cheer.
  Any owner will tall you how much joy a pet brings.For some,an animal provides more comfort than a husband/wife.A 2002study by Karen Allen of the State University of New York measured stress (緊張) levels and blood pressure in people-half of them pet owners-while they performed 5minutes of mental arithmetic (算術(shù)) or held a hand in ice water.Subjects completed the tasks alone,with a husband/wife,a close friend or with a pet.People with pets did it best.Those tested with their animal friends had smaller change in blood pressure and returned most quickly to baseline heart rates.With pets in the room,people also made fewer math mistakes than when doing in front of other companions.It seems people feel more relaxed (放松)around pets,says Allen,who thinks it may be because pets don't judge.
  A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits.Researchers at Northwestern Memorial Hospital spent a year studying 36fat people and their equally fat dogs on diet-and-exercise programs; a separate group of 56people without pets were put on a diet program.On average,people lost about I1pounds,or 5% of their body weight.Their dogs did even better,losing an average of 12pounds,more than 15% of their body weight.Dog owners didn't lose any more weight than those without dogs but,say researchers,got more exercise overall-mostly with their dogs-and found it worth doing.

67.What does the text mainly discuss?A
A.What pets bring to their owners.
B.How pets help people calm down.
C.People's opinions of keeping pets.
D.Pet's value in medical research.
68.We learn from the text that a person with heart disease has a better chance of getting well ifA
A.he has a pet companion
B.he has less stress of work
C.he often does mental arithmetic
D.he is taken care of by his family
69.According to Allen,why did the people do better with pets around when facing stressful tasks?C
A.They have lower blood pressure.
B.They become more patient.
C.They are less nervous.
D.They are in higher spirits.
70.The research mentioned in the last paragraph reports thatA
A.people with dogs did more exercise
B.dogs lost the same weight as people did
C.dogs liked exercise much more than people did
D.people without dogs found the program unhelpful.

分析 本文屬于說明文閱讀,作者主要向我們介紹了科學(xué)不能解釋寵物對(duì)我們的影響,比如有寵物的陪伴可以幫助降低血壓,提高心臟病恢復(fù)的機(jī)會(huì),并且可以感到放松,擁有一只寵物狗也會(huì)改變你的飲食習(xí)慣,使你得到更多的鍛煉.

解答 67.A  主旨大意題,通讀全文可知本文主要講述了寵物給它們的主人帶來的好處,故選A.
68.A  細(xì)節(jié)理解題,根據(jù)第一段but many studies have shown that the company of pets can help lower blood pressure (血壓) and raise chances of recovering from a heart attack,reduce loneliness and spread all-round good cheer.可知許多研究表明寵物的陪伴能幫助降低血壓,提高心臟病恢復(fù)的機(jī)會(huì),故選A.
69.C  細(xì)節(jié)理解題,根據(jù)第二段It seems people feel more relaxed (放松)around pets,says Allen,who thinks it may be because pets don't judge.可知艾倫認(rèn)為人們與寵物在一起時(shí)會(huì)更放松,不緊張,因此面對(duì)壓力時(shí)做的更好,故選C.
70.A  推理判斷題,根據(jù)最后一段Dog owners didn't lose any more weight than those without dogs but,say researchers,got more exercise overall-mostly with their dogs-and found it worth doing.可知養(yǎng)狗的人們會(huì)更多的鍛煉,故選A.

點(diǎn)評(píng) 做閱讀理解時(shí)要快速的瀏覽全文,把握文章主旨大意,帶著問題回到原文,尋找細(xì)節(jié)或概括相應(yīng)的答案,最后要理清作者寫作思路.

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