题目内容
7.Their cheery song brightens many a winter's day.But robins are in danger of wearing themselves out by singing too much.Robins are singing all night一as well as during the day,British-based researchers say.David Dominoni,of Glasgow University,said that light from street lamps,take away signs and homes is affecting the birds'biological clock,leading to them being wide awake when they should be asleep.
Dr Dominoni,who is putting cameras inside nesting boxes to track sleeping patterns,said lack of sleep could put the birds'health at risk.His study shows that when robins are exposed to light at night in the lab,it leads to some genes being active at the wrong time of day.And the more birds are exposed to light,the more active they are at night.
He told people at a conference,"There have been a couple of studies suggesting they are increasing their song output at night and during the day they are still singing.Singing is a costly behavior and it takes energy.So by increasing their song output,there might be some costs of energy."
And it is not just robins that are being kept awake by artificial light.Blackoiids and seagulls are also being more nocturnal.Dr Dominoni said,"In Glasgow where I live,gulls are a serious problem.I have people coming to me saying′You are the bird expert.Can you help us kill these gulls?'.During the breeding(繁殖)season,between April and June,they are very active at night and very noisy and people can't sleep."
Although Dr Dominoni has only studied light pollution,other research concluded that robins living in noisy cities have started to sing at night to make themselves heard over loud noise.
However,some birds thrive(兴旺)in noisy environments.A study from California Polytechnic University found more hummingbirds in areas with heavy industrial machinery.It is thought that they are capitalising on their predators(天敌)fleeing to quieter areas.
42.According to Dr Dominoni's study,what cause rrobins to sing so much?B
A.The breeding season.
B.The light in modem
C.The dangerous environment.
D.The noise from heavy machinery.
43.What is the researchers'concern over the increase of birds'song output?B
A.The environment might be polluted.
B.The birds'health might be damaged.
C.The industry cost might be increased.
D.The people's hearing might be affected.
44.What does the underlined word"nocturnal"in Paragraph 5mean?A
A.Active at night.
B.Inactive at night.
C.Active during the day.
D.Inactive during the day.
45.Why do some birds thrive in noisy environments?A
A.Because there are fewer dangers.
B.Because there is more food to eat.
C.Because there is less light pollution
D.Because there are more places to take shelter.
分析 本文介绍了乌鸦在夜里唱歌与被暴露在光里有关,它们被暴露的时间越久,就变得越活跃.如果这样长期暴露的话,它们就会唱歌很多,也就会损失很多能量,对健康有影响.
解答 42.B 细节理解题.根据"His study shows that when robins are exposed to light at night in the lab,it leads to some genes being active at the wrong time of day.And the more birds are exposed to light,the more active they are at night."可知,如果乌鸦被暴露在光下,它们就很活跃,也就越喜欢唱歌.故答案B正确.
43.B 细节理解题.根据"There have been a couple of studies suggesting they are increasing their song output at night and during the day they are still singing.Singing is a costly behavior and it takes energy.So by increasing their song output,there might be some costs of energy."可知,答案B正确.
44.A 词义猜测题.根据"And it is not just robins that are being kept awake by artificial light.Blackbirds and seagulls are also being"可知乌鸦和海鸥情况也一样,也就是说这两种鸟晚上也唱歌,故选择A.
45.A 细节理解题.根据文章最后一段的"It is thought that they are capitalising on their predators(天敌)fleeing to quieter areas."可知,它们的天敌都去了安静的地方,故选择A.
点评 做阅读理解题,要掌握每种题型的解题技巧.如:细节理解题,要在文章中找到问题的信息句,根据信息句判断正确的答案;词义猜测题,要通读该词的上下句,猜测正确的词义.
-No,a necklace is not _______ that I need most.( )
A. | anything | B. | everything | C. | nothing | D. | something |
Dear Reader,
Please allow me to tell you something before you read this book.When my (36)grandson,Sam,was born,my heart was filled with joy.I had been sitting in a wheelchair for 20years before then,and I have been (37)seriouslyill many times.So I wondered if I would have the(38)timeto tell Sam what I had(39)observed.
For years I have been hosting a program on the (40)radioand writing articles for a magazine.Being(41)unableto move freely,I have learned to sit still and keep my heart (42)open,exchanging thoughts with thousands of listeners and (43)readers.So when Sam was born,I (44)decidedto tell him about school and fridship,romance and work,love and everything else.That's how I started to write these(45)letters.I hope that Sam would (46)readthem sooner or later.
However,that expectation (47)changedwhen Sam showed signs of autism (自闭症) at the age of two.He had actually stopped talking before the discovery of the signs.He (48)refusedto communicate with others,even the family members.That was (49)heartbreakingfor me but didn't stop me writing on.I realized that I had even (50)morenow to tell him.I wanted him to (51)explainwhat it means to be"different"from others,and learn how to fight against the misfortune he'll (52)faceas I myself,his grandfather,did.I just(53)guessedif I could write all that I wanted to say in the rest of my life.
Now,(54)asthe book has been published,I have been given the chance.Every chapter in the book is a letter to Sam:some about my life,and all about what it means to be a(55)man.
Daniel Gottlieb
36.A.son | B.nephew | C.brother | D.grandson |
37.A.seriously | B.mentally | C.slightly | D.quietly |
38.A.ability | B.time | C.courage | D.responsibility |
39.A.written | B.suffered | C.observed | D.lost |
40.A.radio | B.television | C.stage | D.bed |
41.A.ready | B.unable | C.anxious | D.eager |
42.A.warm | B.broken | C.closed | D.open |
43.A.hosts | B.visitors | C.readers | D.reporters |
44.A.began | B.stopped | C.forgot | D.decided |
45.A.letters | B.emails | C.books | D.diaries |
46.A.find | B.read | C.collect | D.keep |
47.A.developed | B.disappeared | C.changed | D.arrived |
48.A.tried | B.refused | C.regretted | D.hoped |
49.A.exciting | B.acceptable | C.strange | D.heartbreaking |
50.A.less | B.everything | C.more | D.nothing |
51.A.understand | B.explain | C.believe | D.question |
52.A.fear | B.face | C.know | D.cause |
53.A.felt | B.guessed | C.saw | D.doubted |
54.A.as | B.once | C.though | D.if |
55.A.teacher | B.child | C.man | D.writer. |
A. | allow | B. | allowed | C. | to allow | D. | allowing |