試卷征集
加入會(huì)員
操作視頻

A black hole is created when a large star burns out.Like our sun,stars are unbelievably hot furnaces(熔爐) that burn their own matter as fuel.When most of the fuel is used up,the star begins to die.
The death of a star is not a quiet event.First there is a huge explosion.As its outer layer is blasted off into space,the dying star shines as brightly as a billion suns.
   After the explosion,gravity pulls in what's left of the star.As the outside of the star sinks toward the center,the star gets smaller and smaller.The material the star is made of becomes tightly packed together.A star is so solid that a teaspoon of matter from it weighs billion of pounds.
   The more the star shrinks(收縮),the stronger the gravity inside it becomes.Soon the star is very tiny,and the gravity pulling it in is unbelievably strong.In fact,the gravity is so strong that it even pulls light into the star!Since all the light is pulled in,none can go out.The star becomes black when there is no light.Then a black hole is born!
   That's what we know about black holes.What we don't know is this:What happens inside a black hole after the star has been squeezed into a tiny ball?Does it keep getting smaller and smaller forever?Such a possibility is hard to imagine.
   But if the black hole doesn't keep shrinking,what happens to it?Some scientists think black holes are like doorways to another world.They say that as the star disappears from our universe,it goes into another universe.In other words a black hole in our universe could turn into a "white hole" in a different universe.As the black hole swallows(吞噬) light,the white hole shines brightly--somewhere else.But where?A different place,perhaps,or a different time--many years in the past or future.
   Could you travel through a black hole?Right now,no.Nothing we know of could go into a black hole without being crushed(擠壓).So far the time being,black hole must remain a mystery.
   Black holes are a mystery--but that hasn't stopped scientists from dreaming about them.One scientist suggested that in the future we might make use of the power of black holes.They would supply all of Earth's energy needs,with plenty to spare.Another scientist wondered if a black hole could some day be used to swallow earthly waste--a sort of huge waste disposal(處理) in the sky!

(1)When the star begins to die
B
B

A.there is no fuel left in it
B.a(chǎn) huge explosion will happen
C.its outer layer goes into space first
D.it doesn't give off light any longer
(2)Which of the following doesn't help produce a black hole?
A
A

A.The dying star shines very brightly.
B.The light can't go out of the star.
C.The star becomes smaller and smaller
D.The gravity inside the star is very strong.
(3)The black hole
D
D

A.continues becoming smaller and smaller all the time
B.goes into another universe and becomes a white hole
C.will appear at another place at a different time
D.can pull in everything we know of in the world
(4)What's the best title for this passage?
B
B

A.A New Scientific Discovery:Black Holes
B.What Are Black Holes?
C.What Are Black Holes?How Do Black Holes Come Into Being?
D.Travel Through A Black Hole

【考點(diǎn)】社會(huì)
【答案】B;A;D;B
【解答】
【點(diǎn)評(píng)】
聲明:本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有,未經(jīng)書(shū)面同意,不得復(fù)制發(fā)布。
發(fā)布:2024/5/27 14:0:0組卷:1引用:2難度:0.4
相似題
  • 1.British children's writer Roald Dahl ate chocolates and sweets "pretty much every mealtime",remembers daughter Ophelia Dahl.
       After dinner,whether dining alone or entertaining guests,Dahl would pass around a little red plastic box full of Mars Bars,Milky Ways,Maltesers,Kit Kats and much more.
       He knew the history of all the sweets and could tell you exactly when they were invented.1937 was a big year when Kit Kats (his favorite),Rolos and Smarties (his dog,chopper's favorite) were invented.He wrote a history of chocolate,lecturing schoolchildren to commit such dates to memory(熟記),such as 1928 when "Cadbury's Fruit and Nut Bar popped up on the scene",saying. "Don't bother with the Kings and Queens of England.All of you should learn these dates instead.Perhaps the Headmistress(女校長(zhǎng))will see from now on that it becomes part of the major teaching in this school."
       According to Dahl,the Golden Years of Chocolate were 1930-1937.In 1930,Roald Dahl was 14 years old.He was a student at Repton,a famous boys' boarding school in England.It was a tough environment:those in authority were more interested in controlling than educating the students.
       Ironically(諷刺地),it was at this difficult period that chocolate became Dahl's passion.Near Repton was a Cadbury chocolate factory.Every so often,Cadbury would send each schoolboy a sampler(樣品)box of new chocolates to taste and grade.They were using the students---"the greatest chocolate bar experts in the world to test out their new inventions.
       This was when Dahl's imagination took flight.He pictured factories with inventing rooms with pots of chocolate and fudge(軟糖)and "all sorts of other delicious fillings bubbling away on the stoves".
        "It was lovely dreaming those dreams…when I was looking for a plot for my second book for children.I remembered those little cardboard boxes(紙盒)and the newly invented chocolates inside them,and I began to write a book called Charlie and the Chocolate Factory."
       For the record,Roald Dahl did not like chocolate cake or chocolate ice cream.He said, "I prefer my chocolate straight."

    (1)What's the purpose of the first paragraph?

    A.To introduce the main topic---Roald Dahl.
    B.To introduce Dahl's love for chocolate.
    C.To introduce main character's daily life.
    D.To introduce some important characters.
    (2)What can we infer from the passage about Roald Dahl?

    A.He treated himself with various chocolate after dinner secretly.
    B.He has a good knowledge of chocolate,especially its history.
    C.He used to lecture schoolchildren of a boys' boarding school.
    D.He only wrote some books related to the history of chocolate.
    (3)What happened during the Golden Years of Chocolate?

    A.It was a great time for children to get educated.
    B.Those years stopped Dahl's interest in chocolate.
    C.Students could become chocolate experts then.
    D.Roald Dahl's passion for chocolate was lit up then.
    (4)
    gave Roald Dahl inspiration to write Charlie and Chocolate Factory.
    A.the dream about chocolates.
    B.Factories with chocolate and fudge.
    C.Those boxes with chocolate.
    D.Chocolate cakes and ice cream

    發(fā)布:2025/1/30 8:0:1組卷:0引用:1難度:0.5
  • 2.Recently,a film star has been giving away free books on the London Underground.If you're a bookworm,a Harry Potter fan and a London Underground user,then it's been an exciting month for you.
       Emma Watson,who starred in films based on the novels about a fictional schoolboy wizard,has been hiding books on the Tube for passengers to read through.
       It's part of he Book On The Underground movement,which has a simple aim:to get more people burying themselves in literature.Books are left on trains for passengers to pick up,dip into and then leave for another lucky reader to skim.
       The movement started in 2012 and drops off about 150 books a week in stations across London.Talking about Watson's participation in the project,the manager of Books On The Under ground,Cornelia Oxley,said, "The reaction has been great.It must be a mixture of how much everyone admires Emma,and how exciting it is to find something as wonderful as a new book on your journey."
       The 100 or so books Watson left for passengers to read were even more special because she left a hand-written inscription(題詞).The books were Kaya Angelou's Mom & Me & Mom.
       One person who discovered a copy of the book on the Tube said she felt like the character Charlie Bucket - a boy who finds a golden ticket to the world's greatest chocolate factory - in the Roald Dahl's classic,Charlie and the Chocolate Factory Watson became a UN Women Goodwill Ambassador in the summer of 2014 and has since started reading as many books and essays on equality and feminism(饑荒) as possible.She has also started her own book club.
       So.Why not take a leaf out of Emma Watson's book and leave a copy of your favorite book on a train?It could make a stranger's life richer.

    (1)What does Books On The Underground aim to do?

    A.To get more readers to buy their books.
    B.To leave books on trains.
    C.To find lucky readers.
    D.To get more people to read.
    (2)Which of the following statements is NOT true?

    A.People's admiration for Emma Watson contributes to the success of the movement.
    B.There is a golden ticket to the world's greatest chocolate factory in the book.
    C.To find something wonderful on a journey is exciting.
    D.Emma Watson left hand-written inscriptions on the books.
    (3)What's the author's attitude towards Emma Watson's leaving books on the train?

    A.critical
    B.indifferent
    C.supportive
    D.pessimistic

    發(fā)布:2025/1/30 8:0:1組卷:0引用:1難度:0.5
  • 3.It can be really hard to learn a new language.I had always enjoyed learning languages in school,but only recently did I start learning German.I found that I could understand and learn individual words easily,but when it came to literature,I really struggled.That was when my tutor at university suggested reading some children's books printed in the target language.
       At first,I felt a bit silly going on a hunt for a book designed for someone half my age,but then I realised that everyone has to start somewhere.As children,we are given these basic texts to familiarise our brains with certain vocabulary and writing structures,and from there,we can learn and develop.I started with books which are taught to us as children in the UK.I managed to find Oliver Twist by Charles Dickens and James and the Giant Peach by Roald Dahl.
       The beauty of reading books that were introduced to you as a child is that you are already familiar with the plot.Therefore you can work out some words with your knowledge of the story.At first,I used to read with the book in one hand and a dictionary in the other,but this did not work well.The method I would recommend is to read a chapter first and at the end of that chapter,highlight the new words and then look up the definitions.If you can wait a bit before using a dictionary,you may be surprised what you can understand merely from the context.Additionally,a lot of children's books have pictures which may give you a clue as to what or to whom the passage is referring.
       If you can find a translation of the books you have read as a child,I would strongly advise reading those if you are a complete beginner.However,if you feel a bit more confident reading in English,I would personally recommend the series of 'Harry Potter' books by J.K.Rowling or any of the Roald Dahl children's books.

    (1)What makes it hard for the author to learn German?

    A.The author had a poor memory.
    B.The author had no interest in it.
    C.The author had no one to ask for help.
    D.The author couldn't read books fluently.
    (2)What did the author think of reading children's books in the target language at first?

    A.Interesting.
    B.Stupid.
    C.Helpful.
    D.Boring.
    (3)What does the author try to express mainly in Paragraph 3?

    A.How to deal with new words while reading.
    B.Why it is helpful to read children's book at first.
    C.How to choose a proper book to match your level.
    D.How to form the habit of reading in the target language.
    (4)Why does the author write this text?

    A.To give tips on how to learn a new language.
    B.To persuade the readers to learn a new language.
    C.To stress the importance of reading in language learning.
    D.To share the author's stories of learning a new language.

    發(fā)布:2025/1/30 8:0:1組卷:5引用:1難度:0.5
APP開(kāi)發(fā)者:深圳市菁優(yōu)智慧教育股份有限公司| 應(yīng)用名稱(chēng):菁優(yōu)網(wǎng) | 應(yīng)用版本:5.0.7 |隱私協(xié)議|第三方SDK|用戶(hù)服務(wù)條款
本網(wǎng)部分資源來(lái)源于會(huì)員上傳,除本網(wǎng)組織的資源外,版權(quán)歸原作者所有,如有侵犯版權(quán),請(qǐng)立刻和本網(wǎng)聯(lián)系并提供證據(jù),本網(wǎng)將在三個(gè)工作日內(nèi)改正