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California Condor's Shocking Recovery
California condors are North America's largest birds，with wing-length of up to 3 meters.In the 1980s，electrical lines and lead poisoning （鉛中毒）nearly drove them to dying out.Now，electric shock training and medical treatment are helping to rescue these big birds.
   In the late 1980s，the last few condors were taken from the wild to be bred（繁殖）.Since 1992，there have been multiple reintroductions to the wild，and there are now more than 150 flying over California and nearby Arizona，Utah and Baja in Mexico.
   Electrical lines have been killing them off. "As they go in to rest for the night，they just don't see the power lines，" says Bruce Rideout of San Diego Zoo.Their wings can bridge the gap between lines，resulting in electrocution （電死）if they touch two lines at once.
   So scientists have come up with a shocking idea.Tall poles，placed in large training areas，teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock.Before the training was introduced，66% of set-free birds died of electrocution.This has now dropped to 18%.
   Lead poisoning has proved more difficult to deal with.When condors eat dead bodies of other animals containing lead，they absorb large quantities of lead.This affects their nervous systems and ability to produce baby birds，and can lead to kidney（腎）failure and death.So condors with high levels of lead are sent to Los Angeles Zoo，where they are treated with calcium EDTA，a chemical that removes lead from the blood over several days.This work is starting to pay off.The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2019.
   Rideout's team thinks that the California condors' average survival time in the wild is now just under eight years. "Although these measures are not effective forever，they are vital for now，" he says. "They are truly good birds that are worth every effort we put into recovering them."

（1）California condors attract researchers' interest because they
D
D
.
A．a(chǎn)re active at night
B．had to be bred in the wild
C．a(chǎn)re found only in California
D．a(chǎn)lmost died out in the 1980s
（2）Researchers have found electrical lines are
B
B
.
A．blocking condors' journey home
B．big killers of California condors
C．rest places for condors at night
D．used to keep condors away
（3）According to Paragraph 5，lead poisoning
D
D
.
A．makes condors too nervous to fly
B．has little effect on condors' kidneys
C．can hardly be gotten rid of from condors' blood
D．makes it difficult for condors to produce baby birds

【考點(diǎn)】社會(huì)；說(shuō)明文．

【答案】D；B；D

【解答】

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發(fā)布：2024/5/27 14:0:0組卷：6引用：1難度：0.6

相似題

1．It's school time again!You're probably feeling excited and maybe a little sad for the vacation is over.Some kids feel nervous or a little scared on the first day of school because of all the new things：new teachers，new friends，and maybe even a new school.Luckily，these "new" worries only stick around for a little while.Let's find out more about going back to school.
   Most teachers kick off the school year by introducing themselves and talking about what you'll be doing that year.Some teachers give students a chance to tell something about themselves to the rest of the class.
   When teachers do the talking on the first day，they often go over classroom rules so you'll know what's allowed and what's not.Pay close attention so you'll know if you need to raise your hand to ask a question and what the rules are about visiting the restroom.
   You might already know a lot of people in your class on the first day.But it's a great day to make new friends，so try to say "hello" to the kids you know and the new ones that you don't.Make the first move and you'll be glad about what you did and so will your new friends!
   Most teachers let you pick your own seat on the first day，but by the second or third morning，they'll have mapped out a seating plan.It's a good idea to write down where your seat is in your notebook so you don't forget.
   Here are a few final tips for a fantastic（奇異的）first day：Get enough sleep；Have a healthy breakfast；Try your best；Develop good work habits，like writing down your assignments（作業(yè)）and handing in your homework on time；Take your time with schoolwork；If you don't understand something，ask the teacher.

（1）In the second paragraph the underlined phrase "kick off" most probably means "

".
A．jump over
B．start
C．talk about
D．finish
（2）Which of the following is TRUE according to the passage？

A．All students feel excited about a new term.
B．All teachers let students pick their seats.
C．New school worries do not last very long.
D．Being hard-working helps make new friends.
（3）If students have any questions，it's suggested that they should

.
A．turn to their teachers
B．write them down
C．a(chǎn)sk their parents
D．help with each other
發(fā)布：2024/11/8 3:0:3組卷：1引用：1難度：0.6
解析
2．Surfing the Internet for fun will make you a better employee，according to an Australian study.
   The University of Melbourne study shows that people who use the Internet for their own reasons at work are about 9 percent more productive than those who do not.Study author Brent Coker said， "Surfing the Internet at times helps increase an employee's attention."
   "People need to relax for a bit to get back their attention，" Coker said on the university's website. "Having a short break，such as a quick surfing of the Internet，helps the mind to rest itself，leading to a higher total Internet attention for a day's work，and as a result，increases productivity（生產(chǎn)效率），" he said.
   According to the study of 300 workers，70 percent of people who use the Internet at work surf the Internet for their own reasons during office hours.Among the most popular surfing activities are searching for information about products，reading online news，playing online games and watching videos. "Firms spend a lot of money on software to block their employees from watching video，using social networking sites or shopping online，" said Coker. "That's not always a good idea."
   However，Coker said the study looked at people who surfed the Internet in moderation（適度），or were on the Internet for less than 20 percent of their total time in the office. "Those who spend too much time surfing the Internet will have a lower productivity than those without，" he said.

（1）What does the University of Melbourne study mainly show？

A．People who surf the Internet are good employees.
B．Not everyone surfs the Internet for fun during office hours.
C．Surfing the Internet for fun during office hours increases productivity.
D．The Internet is becoming more and more important in people's life.
（2）According to Paragraph 3，Brent Coker would most probably agree that

.
A．the longer a person's mind rests ，the better attention he will have
B．surfing the Internet is the best way to increase productivity
C．workers should have a long break during office hours
D．Workers should let their minds rest now and then
（3）Which of the following is NOT mentioned in the passage as one of the most popular surfing activities？

A．Watching videos.
B．Reading online news.
C．Reading online novels.
D．Playing online games.
（4）What can we infer form the last paragraph？

A．Spending too much time surfing the Internet reduces productivity.
B．Those who never surf the Internet have the lowest productivity.
C．Most people don't surf the Internet in moderation during office hours.
D．People should spend as little time as possible surfing the Internet.
發(fā)布：2024/11/8 15:0:1組卷：9引用：1難度：0.6
解析
3．The term "graffiti" is an Italian word meaning scratching or scribbling（亂涂）．It entered the English language in the 1850s，specifically to describe the casual wall writing that experts found in Pompeii and the Roman tombs．Originally a term used only in ancient scribbling，the word has undergone considerable expansion of meaning in the past 75 years so that it now refers to any written message on a wall．Graffiti are characterized by their casualness；if they were more formal，they would be known as inscriptions（銘文）．
   The first piece of graffiti was found on one of the walls of the city Pompeii，which was destroyed by the eruption of Mount Vesuvius in 79 AD．It was one of 1，600 pieces of graffiti uncovered in Pompeii during a dig in the 19th century．Not surprisingly，there is much evidence of graffiti writing on the pyramid and temples of ancient Egypt．It is likely that ever since people have had walls and materials to scratch or paint with，they have been engaged in this simplest form of communication．
   The writing of graffiti gives people a unique opportunity to achieve some kind of public audience．Thus short poems，declarations of love，pieces of political and revolutionary polemic（論戰(zhàn)），and criticisms of institutions and people form a significant part of graffiti．
   Apart from its usefulness in terms of self-expression，graffiti is also a valuable source for historians．There is always the possibility that historical events may be recorded by the presence of graffiti．Perhaps the most interesting example of this is the graffiti relating to the gladiatorial（角斗士） contests held in Pompeii．Graffiti can also give us a unique view into the daily life and customs of a people，for its casual expression encourages the recording of details that more formal writing would tend to ignore．
    In the late 1970s，graffiti became popular．A thought written on a toilet wall in Wolverhampton can now be read in Chicago or Adelaide．In its own way，this is probably the most fascinating example of McLuhan's concept of "the global village"． We now have a worldwide toilet wall．

（1）According to the first paragraph，graffiti

．
A．is another name for "inscription"
B．got its name from the English language
C．was born in the 1850s
D．Mainly refers to casual writing or pictures on walls
（2）What can be inferred from the second paragraph？

A．Graffiti has a long history．
B．Graffiti is an attractive form of art．
C．Graffiti made the ancient city Pompeii famous．
D．Graffiti was ancient Egyptian's main way of communication．
（3）What does the third and fourth paragraphs mainly tell us？

A．Graffiti's great value．
B．Graffiti's features．
C．Graffiti's way of expression．
D．Graffiti's connection with people's daily life．
（4）The graffiti relating to the gladiatorial contests is mentioned in the passage to prove that

．
A．graffiti can show people's customs
B．graffiti can provide valuable historical evidence
C．graffiti was mainly used to record important events
D．graffiti can provide more detailed information than formal writing
（5）The underlined sentence in the last paragraph implies that

．
A．the presence of graffiti makes the world closely connected
B．the concept of "the global village" is famous worldwide
C．graffiti ha become very popular all over the world
D．people like using toilet walls to share their graffiti
發(fā)布：2024/11/8 5:0:1組卷：50引用：3難度：0.6
解析

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