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A description of the threat hanging over the world's mammals，reptiles，amphibians and other life forms has been published by the well-known scientific journal，Nature.A special analysis carried out by the journal indicates that an astonishing 41% of all amphibians on the planet now face extinction while 26% of mammal species and 13% of birds are similarly threatened.
   In each case，the finger of blame points directly at human activities The continuing spread of agriculture is destroying millions of hectares of wild habitats every year，leaving animals without homes，while the introduction of newly-come species，often helped by humans，is also damaging native populations.At the same time，pollution and overfishing are destroying ocean ecosystems.
   "Habitat destruction，pollution or overfishing either kill off wild creatures and plants or leave them badly weakened，" said Derek Tittensor，an ocean ecologist at the World Conservation Monitoring Centre in Cambridge. "The trouble is that in coming decades，the additional threat of worsening climate change will become more and more common and will then kill off these survivors."
   The problem，according to Nature，is worsened because of the huge gaps in scientists' knowledge about the planet's biodiversity.Evaluations of the total number of species of animals and plants alive vary from 2 million to 50 million.In addition，evaluations of current rates of species' disappearances vary from 500 to 36，000 a year. "That is the real problem we face，" added Tittensor. "The scale of uncertainty is huge."
   In the end，however，the data indicate that the world is heading cruelly towards a mass extinction - which is defined as one involving a loss of 75% of species or more. This could arrive in less than a hundred years or could take a thousand，depending on extinction rates.

（1）What's the main idea of the first paragraph？
C
C

A．Figures about some wild animals are astonishing.
B．"Nature" is the famous journal around the world.
C．Many endangered species are close to extinction.
D．Some rare species have appeared around the world.
（2）From the text we know that the future threat to creatures and plants is
C
C
.
A．destruction of habitats
B．overfishing and pollution
C．the worsening climate change
D．human activities
（3）What is the real problem we are facing now according to paragraph 4？
D
D

A．The killing of wild creatures and cutting of trees.
B．The global warming caused by human beings.
C．The destruction of ocean ecosystem by pollution.
D．Evaluation of current rates of species' disappearances.
（4）What does "This" in the last sentence refer to
A
A
？
A．Mass extinction
B．Extinction rates
C．Extinction time
D．75% of species or more

【考點】說明文．

【答案】C；C；D；A

【解答】

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發(fā)布：2024/5/27 14:0:0組卷：4引用：1難度：0.5

相似題

1．Suppose you are out shopping and come across an old friend who starts telling you a story that seems to be dragging on and on.You want to seem interested，so you offer the occasional "Oh" or "I see".To your surprise，though，this person angrily stops and says， "Sorry if I'm boring you!"
   Where did this come from？Clearly，your body language must have let out your inner feelings.The idea that verbal （口頭的） and nonverbal messages can conflict was the inspiration for a recently published study from Yale University's Lueylle Armentano.
   To test the role of verbal-nonverbal mismatch on emotional communication，Armentano and her partner created experimental conditions to see what happens when someone asks for help from strangers.The research team created videotapes of a fellow Yale student expressing nervousness in his words，bodily gestures，or both.The bodily gestures included running his hands through his hair，grabbing his arm，and facially expressing uneasiness.The key question was whether the other participants，another 82 Yale students，would believe the student and provide the help he was requesting.They needed to give their responses.
   Turning to the findings，those nonverbal cues （提示） of nervousness had a greater impact on helping behavior than the verbal cues.Surprisingly，helping behavior was the highest when verbal expressions of nervousness were low but nonverbal cues were high.
   Recognizing that your body language can outweigh your words means that you need to be mindful of what your body is doing when you're interacting with others.Generally，when someone is speaking to you，you want to look like you're interested.Not only should you maintain eye contact，but you should keep your body still and face toward the other person.

（1）What is the main idea of paragraph 1？

A．The obvious advantages of body language.
B．The proper way to interact with old friends.
C．A situation where body language is necessary.
D．An example of the conflict of verbal and nonverbal messages.
（2）What was the task of the 82 Yale students ？

A．Try to win the nervous student's trust.
B．Respond to the nervous student's request.
C．Identify the types of body language.
D．Express nervousness in their words.
（3）What would probably win kindness from strangers？

A．Nonverbal cues of nervousness
B．Good manners in front of others.
C．Sincere verbal expressions.
D．Positive attitude to nervousness.
（4）What is the purpose of the writer in the last paragraph？

A．Give some warnings.
B．Present some facts.
C．Offer suggestions.
D．Make a prediction
發(fā)布：2024/11/15 3:0:1組卷：3引用：2難度：0.5
解析
2．Why should mankind explore space？Why should money，time and effort be spent exploring and researching something with so few apparent benefits？Why should resources be spent on space rather than on conditions and people on Earth？These are questions that，understandably，are very often asked.
   Perhaps the best answer lies in our genetic makeup as human beings.What drove our ancestors to move from the trees into the plains，and on into all possible areas and environments？The wider the spread of a species，the better its chance of survival.Perhaps the best reason for exploring space is this genetic tendency to expand wherever possible.
   Nearly every successful civilization has explored，because by doing so，any dangers in surrounding areas can be identified and prepared for.Without knowledge，we may be completely destroyed by the danger.With knowledge，we can lessen its effects.
   Exploration also allows minerals and other potential resources to be found.Even if we have no immediate need of them，they will perhaps be useful later.Resources may be more than physical possessions.Knowledge or techniques have been acquired through exploration.The techniques may have medical applications which can improve the length or quality of our lives.We have already benefited from other spin-offs including improvements in earthquake prediction，in satellites for weather forecasting and in communications systems.Even non-stick pans and mirrored sunglasses are by-products （副產品） of technological developments in the space industry!
   While many resources are spent on what seems a small return，the exploration of space allows creative，brave and intelligent members of our species to focus on what may serve to save us.While space may hold many wonders and explanations of how the universe was formed or how it works，it also holds dangers.The danger exists，but knowledge can help human beings to survive.Without the ability to reach out across space，the chance to save ourselves might not exist.
   While Earth is the only planet known to support life，surely the adaptive ability of humans would allow us to live on other planets.It is true that the lifestyle would be different，but human life cultures have adapted in the past and surely could in the future.

（1）What is the reason for exploring space based on Paragraph 2？

A．Humans are nature-born to do so.
B．Humans have the tendency to fight.
C．Humans may find new sources of food.
D．Humans don't like to stay in the same place.
（2）The underlined word "spin-offs" in Paragraph 4 probably refers to

.
A．survival chances
B．potential resources
C．unexpected benefits
D．physical possessions
（3）What makes it possible for humans to live on other planets？

A．Our genetic makeup
B．Resources on the earth
C．The adaptive ability of humans
D．By-products in space exploration
（4）Which of the statements can best sum up the passage？

A．Space exploration has created many wonders.
B．Space exploration provides the best value for money.
C．Space exploration can benefit science and technology.
D．Space exploration may help us avoid potential problems on Earth.
發(fā)布：2024/11/15 1:0:1組卷：10引用：2難度：0.5
解析
3．Animals are natural resources that people have wasted all through our history.
   Animals have been killed for their fur and feathers，for food，for sport，and simply because they were in the way.Thousands of kinds of animals have disappeared from the earth forever.Hundreds more are on the danger list today.About 170 kinds in the United States alone are considered in danger.
   Why should people care？Because we need animals.And because once they are gone，there will never be any more.
   Animals are more than beautiful or interesting or a source of food.Every animal has its place in the balance of nature.Destroying one kind of animal can create many problems.
   For example，when farmers killed large numbers of hawks（鷹），the farmers' stores of corn and grain were destroyed by mice.Why？Because hawks eat mice．With no hawks to keep down their numbers，the mice multiplied quickly.
   Luckily，some people are working to help save the animals.Some groups raise money to let people know about the problem.And they try to get the governments to pass laws protecting animals in danger.
   Quite a few countries have passed laws.These laws forbid the killing of any animal or plant on the danger list.Slowly，the number of some animals in danger is growing.

（1）What is the best title for the passage？

A．Save the Animals
B．Useful Animals
C．Laws for Animals
D．Animals in Danger
（2）Animals are important to us mainly because

.
A．they give us a source of food
B．they are beautiful and lovely
C．they keep the balance of nature
D．they give us a lot of pleasure
（3）What is the meaning of the underlined word "multiplied" in the passage？

A．Became more.
B．Became less.
C．Turned black.
D．Ate food.
（4）We can infer from the passage that

.
A．people have known the importance of animal protection since a long time ago
B．animals play an important role in people's life
C．the number of hawks is on the decrease
D．many countries passed laws forbidding the killing of any animal
發(fā)布：2024/11/15 4:0:1組卷：10引用：2難度：0.5
解析

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