Cuckoos don't bother building their own nests-they just lay eggs that perfectly imitate those of other birds and take over their nests.But other birds are wishing up,evolving some seriously impressive tricks to spot the cuckoo eggs.
Cuckoos are often know as parasites,meaning that they hide their eggs in the nest of other species.To avoid detection,the cuckoos have evolved so that eggs seem reproduction of those of their preferred targets.If the host bird doesn't notice the strange egg in its nest,the little cuckoo will actually take the entire nest for itself after it comes out,taking the other eggs on its back and dropping them out of the nest.
To avoid this unpleasant fate for their young,the other birds have evolved a few smart ways to spot the fakes,which we're only now beginning to fully understand.One of the most amazing finds is that birds have an extra colour-sensitive cell in their eyes,which makes them far more sensitive to ultraviolet(紫外線)wavelengths and allows them to see a far greater range of colours than humans can.This allows cautious birds to detect a fake egg which might be exactly the same to our eyes.
Fascinatingly,we're actually able to observe different bird species at very different points in their evolutionary war with the cuckoos.For instance,some cuckoos lay their eggs in the nests of the redstarts.The blue eggs these cuckoos lay are practically alike to those of the redstarts,and yet they are still sometimes rejected.Compare that with cuckoos who target dunnocks.While those birds lay perfectly blue eggs,their cuckoo invaders just lay white eggs with brown irregular shaped spots.And yet dunnocks barely ever seem to notice the obvious trick.
Biologists suspect these more easily fooled species like the dunnocks are on the same evolutionary path as the redstarts,but they have a long way to go until they evolve the same levels of suspicion.What's remarkable is that the dunnocks fakes are so bad and the redstart ones so good,and yet cuckoos are still more successful with the former than the latter.
It speaks to just how thoroughly a species' behavior can be changed by the pressures of natural selection,or it might just be a bit of strategic cooperation on the part of the dunnocks.Biologists have suggested that these birds are willing to tolerate a parasite every so often because they don't want to risk accidentally getting rid of one of their own eggs.
(1)This passage can be most likely found in a BB.
A.science survey
B.nature magazine
C.zoo advertisement
D.travel journal
(2)What does the underlined word "parasite" in paragraph 2 most probably refer to? DD
A.Animals that work together to raise young.
B.Small harmful animals such as worms or mice.
C.Animals that can adapt to changing environments.
D.Animals which live on or inside other host animals.
(3)Which of the following is TRUE about the dunnock according to the passage? CC
A.It is colour-blind and therefore cannot identify foreign eggs in the nest.
B.It can easily remove cuckoo eggs from the nest because fakes are so bad.
C.It is a host bird that is more likely to raise a cuckoo chick than the redstart.
D.It is unable to evolve and hence accepts cuckoo eggs that appear in the nest.
(4)Which of the following can be inferred from the passage? AA
A.Dunnocks may eventually learn to recognise foreign eggs.
B.Redstarts seem to be less suspicious compared to dunnocks.
C.Cuckoo birds are good at taking responsibility for their own young.
D.It is very easy for cuckoos to imitate the colouring of the dunnock's egg.
【考點(diǎn)】記敘文.
【答案】B;D;C;A
【解答】
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發(fā)布:2024/4/20 14:35:0組卷:40引用:1難度:0.3
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1.Roald Dahl was a spy,an ace fighter pilot,a chocolate historian and a medical inventor.He was also the author of Charlie and the Chocolate Factory,Matilda,The BFG,and a treasury of original,evergreen,and beloved children's books.He remains for many the world's No.1 storyteller.
Born in Llandaff,Wales,on 13th September 1916 to Norwegian parents,Harald Dahl and Sofie Magdalene Hesselberg,Dahl was named after Roald Amundsen,the Norwegian who had been the first man to reach the South Pole just four years earlier.A heroic start in life.
Wanting the best for her only son,his mother sent him to a boarding school - Repton,a renowned British public school.With schooldays happily behind him,Dahl's lust for travel took him first to Canada,then to East Africa,where he worked for an oil company until the outbreak of World War Ⅱ.He enlisted in the Royal Air Force at 23 years old.In 1953 Roald Dahl married the American actress,Patricia Neal,with whom he had five children.
There followed a burst of literary energy as his endless creativity led to one wonder after another:in 1961 James and the Giant Peach was published in the US,followed by Charlie and the Chocolate Factory.Fantastic Mr.Fox was published in 1970,the year before the film Willy Wonka and the Chocolate Factory was released.The rest of the decade saw the publication of many other classics,including Danny the Champion of the World,The Enormous Crocodile,and My Uncle Oswald.
Roald Dahl died on 23 November 1990,aged 74.He was buried in the parish church of St.Peter and St.Paul in Great Missende - the Buckinghamshire village where today The Roald Dahl Museum and Story Centre continues his extraordinary mission to amaze,thrill and inspire generations of children and their parents.
(1)What do you know about Ronald Dahl?
A.He was born in Norway.
B.He was talented in many fields.
C.His mother worked in a school.
D.His father reached the South Pole.
(2)What does the underlined word "lust" in Paragraph 3 mean?
A.Vain hope.
B.Special care.
C.Strong desire.
D.Main concern.
(3)How is Paragraph 4 mainly developed?
A.By giving examples.
B.By analyzing causes.
C.By presenting figures.
D.By making comparisons.
(4)Which words can best describe the children's books penned by Ronald Dahl?
A.Amazing and humorous.
B.Educational and serious.
C.Imaginative and scary.
D.Fascinating and encouraging.發(fā)布:2025/1/30 8:0:1組卷:3引用:2難度:0.5 -
2.On Thursday,many people were remembering the American writer Theodore Seuss Geisel -better known as "Dr Seuss".
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On Thursday,the hashtags(話題標(biāo)簽)#DrSeuss and #WorldBookDay were two of the top trending topics on Twitter.
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(1)What can we infer from the passage?
A.De Seuss'books have been influential in Children's reading.
B.Dr Seuss was best remembered because of his book The Lorax.
C.Books with colorful pictures and fun rhymes are attractive to people.
D.Dr Seuss,Roald Dahl,J.K.Rowling lived in the same age.
(2)Who is remembered on World book and Copyright Day?
A.Roald Dahl.
B.Maurice Sendak.
C.Miguel de Cervantes.
D.J.K.Rowling.
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A.The Life of Dr Seuss
B.Children's Books Written by Dr Seuss
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D.Dr Seuss Honored on World Book Day發(fā)布:2025/1/30 8:0:1組卷:6引用:1難度:0.5 -
3.When Laura wanted to go into the garden by the back door,it was blocked by servants.
Something had happened.
"What's the matter?What's happened?"
"There's been a horrible accident/ said the cook. "A man killed."
"A man killed!Where?How?When?"
"Know those little cottages just below here,Miss?" Know them?Of course,Laura knew them. "Well,there's a young guy living there,name of Scott,a carter His horse shied (受驚)at a traction-engine,and he was thrown out on the back of his head.Killed."
"Dead!" Laura stared at the cook.
"Dead when they picked him up," said the cook. 'Just now they were taking the body home.He'﹩left a wife and five little ones."
"Jose,come here." Laura caught her sister's sleeve and dragged her through the kitchen into the garden.There she paused. "Jose!" she said,horrified, ''however are we going to stop everything?'
"Stop everything,Laura!" cried Jose in astonishment. "What do you mean?"
"Stop the garden party,of course.Why did Jose pretend?"
But Jose was still more amazed. "Stop the garden party?My dear Laura,don't be so absurd.Of course we can't do anything of the kind.Nobody expects us to.Don't be so extravagant."
"But we can't possibly have a garden party with a man dead just outside the front gate."
That really was extravagant.Those little cottages,those miserable houses,had no right to be in that rich neighbourhood in the first place.When Laura and Jose were little they were even forbidden to set foot there because of the rude language and of what they might see.It was dirty and disgusting.
"And just think of what the band would sound like to that poor woman," said Laura.
"Oh,Laura!" Jose began to be seriously annoyed,"If you're going to stop a band playing every time some one has an accident,you'll lead a very difficult life,I'm every bit as sorry about it as you.But you won't bring a drunken workman back to life by being sentimental(多愁善感的)."
"Drunk!Who said he was drunk?" Laura turned angrily on Jose, "I'm going straight up to tell mother."
"Do,dear," said Jose,gently.
"Mother,can I come into your mom?" Laura turned the big glass door-knob.
"Of course,child.Why,what's the matter?What's given you such a colour?" And Mrs.Sheridan turned round from her dressing-table.She was trying on a new hat.
"Mother,a man's been killed," began Laura.
"Not in the garden?" interrupted her mother.
"No,no!"
"Oh,what a fright you gave me!" Mrs.Sheridan sighed with relief and took off the big hat and held it on her knees.
"But listen,mother," said Laura,Breathless,half-choking,she told the dreadful story. "Of course,we can't have our party,can we?" she begged. "The band and everybody arriving.And the poor family would hear us,mother;they're nearly neighbours!"
"Oh,Laura's astonishment her mother behaved just like Jose;it was harder to bear because she seemed amused.She refused to take Laura seriously."
"But,my dear child,use your common sense.If some one had died there normally 一 and I can't understand how they keep alive in those little holes 一 we should still be having our party,shouldn't we?"
Laura had to say "yes" to that,but she felt it was all wrong.
"Mother,isn't it terribly heartless of us?" she asked.
"Darling!" Mrs.Sheridan got up and came over to her,carrying the hat. "My child!" said her mother, "the hat is yours.It's made for you.Wow!Look at yourself!And she held up her hand-mirror.
"But,mother," Laura began again.She couldn't look at herself;she turned aside.
This time Mrs.Sheridan lost patience just as Jose had done.
"You are being very absurd,Laura," she said coldly. "People like that don't expect sacrifices from us.And it's not very sympathetic to spoil everybody's enjoyment as you're doing now,"
"I don't understand,'' murmured Laura.Then,quite by chance,she saw this charming girl in the mirror,in the beautiful hat.Never had she imagined she could look like that.Is mother right?she thought.And now she hoped her mother was right.Am I being extravagant?Perhaps.Just for a moment she had another glimpse of that poor woman and those little children,and the body being carried into the house.But it all seemed blurred,unreal,like a picture in the newspaper.I'll remember it again after the party's over,she decided.And somehow that seemed quite the best plan …
(1)Laura suggested stopping everything because
A.something bad had happened in the garden
B.her neighbours were experiencing great grief
C.the servants blocked the back door of the garden
D.she wanted to provide material help for the poor family
(2)What does the last paragraph mainly tell us?
A.Laura was trying to submit herself to her family.
B.The news of the carter's death finally hit the headlines.
C.Laura hoped mother was right in choosing that hat for her.
D.A poor man's death was little more than an unimportant thing.
(3)What will most probably happen following this story?
A.Laura came up with a best plan to solve all this.
B.Laura managed to persuade her mother and sister.
C.The party just continued as planned in the garden.
D.The poor widow came over to scold the band.
(4)Which of the following can best describe Laura?
A.Sentimental and persistent.
B.Optimistic and easy-going.
C.Considerate and sympathetic.
D.Hardworking and open-minded.
(5)What does the underlined word "extravagant" probably mean?
A.Too sensible.
B.Not practical
C.Too upright.
D.Not sympathetic.
(6)Which of the following can be the best title of the story?
A.The garden party.
B.The quarrel.
C.The rich and the poor.
D.The death of a neighbour.發(fā)布:2025/1/30 8:0:1組卷:15引用:1難度:0.7
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