When most people think of giant pandas, the pictures of the cute, black-and-white bears from China that eat bamboo will immediately jump into their mind. Scientists from Mississippi State University, however, are interested in what they leave behind: their poop(排泄物). At a recent meeting in Denver, Professor Brown at the university presented her research showing how panda poop could inspire a new way to obtain energy from plants, which are a renewable energy source. Usually, plants can be called biomass(有機(jī)燃料) when they are used as an energy source.
Burning biomass is one way to capture its energy, but Brown hopes panda poop can teach scientists something about breaking down biomass. Pandas—or at least the bacteria in their stomachs—are very good at getting energy out of bamboo. Unlike cows, which use 4 stomachs to digest large amounts of grass, a panda has only one stomach. Bamboo comes in, and poop goes out.
Every day for 14 months, Brown and her team on this project, counted the bacteria in the poop of the two pandas, YaYa and LeLe living at the Memphis Zoo. Her studies turned up 12 species of bacteria that break down biomass, including one that had never been found in pandas. Brown says that because the poop contains bacteria that break down biomass, it could also be used to break down other types of biomass.
Now the scientists hope to identify the chemicals that help with the process of breaking down biomass and then figure out how the bacteria work. If those chemicals can be made in the lab, they could be used to turn biomass—like grass or other plants—into fuel.
Brown says she doesn’t mind handling panda poop. “It’s probably the most pleasant material to work with,” she says, “My colleagues and I have been working with other poop for a long time, and we can assure you it has a fairly pleasant smell associated with it.”
小題1:The importance of studying panda poop is _______.
A.to create a renewable energy from plants
B.to explore a new way to get energy from plants
C.to learn a lesson of energy from panda poop
D.to figure out how the bacteria work for us mankind
小題2:The process of the panda poop project can be described as ______.
a. Identify the chemicals helpful to break down biomass.
b. Find the bacteria in panda poop which break down bamboo.
c. Reproduce the chemicals in the lab to turn biomass into energy.
d. Analyze how the bacteria in panda poop work in panda’s stomach.
A. a, b, d, c          B. a, d, c, b          C. b, a, d, c          D. b, d, a, c
小題3:What does the author mainly want to express in the 2nd paragraph?
A.Pandas don’t digest bamboo the same way as cows.
B.Pandas are capable of getting energy using stomachs.
C.Pandas can get energy from bamboo more efficiently.
D.Scientists have learnt something new from panda poop.
小題4:What does Professor Brown think of working with panda poop?
A.SickB.ChallengingC.InspiringD.Enjoyable

小題1:B
小題2:C
小題3:C
小題4:D
本文主要講述了研究發(fā)現(xiàn)熊貓的排泄物中可以得到能量以及科學(xué)家研究的過(guò)程。
小題1:細(xì)節(jié)理解題。 根據(jù)地一段第三句話(huà)At a recent meeting in Denver, Professor Brown at the university presented her research showing how panda poop could inspire a new way to obtain energy from plants, which are a renewable energy source.可知答案為B。
小題2:細(xì)節(jié)排序題。 根據(jù)文章第三段最后一句話(huà)及第四段內(nèi)容可知,答案為C。
小題3:主旨理解題。有第二段可知,通過(guò)panada與cow食物消化的對(duì)比可知,熊貓更擅長(zhǎng)于從竹子中得到能量。
小題4:細(xì)節(jié)理解題。 從最后一段Brown says she doesn’t mind handling panda poop. “It’s probably the most pleasant material to work with,”可知,答案為D.
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Many parents watch the news or other shows as children play nearby. But new research shows that even when the television is just background noise,it may be disruptive to a child’s normal development.
It’s estimated that 75 percent of very young children in the United States live in homes where the television is on most of the time,even though the kids often aren’t watching it. The University of Massachusetts researchers recently studied how TV background noise might affect young children. The study looked at 50 1­,2­and 3­year­olds. Each child came to a lab with a parent and was allowed to play for an hour with various toys. For half the time,a television was on in the room,showing the adult game show as well as advertisements. During the other half hour,the TV was turned off.
As expected,the children paid little attention to the adult television show,glancing at it for less than a few seconds at a time,and less than once a minute. Even so,the distraction (分心) of the background noise had a significant effect on how children at every age played. When the television was on,the children played with each toy for far shorter periods of time,and focused attention during play was also shorter compared to how they played when the TV was off.
Researchers said that even though the children aren’t interested in the show,background TV affects their ability to do various types of play. The finding is important because many well­meaning parents who wouldn’t let their young children watch television may not realize that even adult programs that don’t interest children still can have an effect.
“Background TV is potentially a chronic (長(zhǎng)期的) environmental risk factor affecting most American children,” said the lead author of the study. “Parents should limit their young children’s exposure (接觸).”
小題1:We know from the passage that________.
A.background TV noise has little effect on adults
B.most young children in America live in homes exposed to TV noise
C.the effect of background TV noise on children is immediate
D.most parents in America wouldn’t let their children watch TV
小題2:The underlined word “disruptive” in Paragraph 1 is closest in meaning to________.
A.harmfulB.importantC.similar D.related
小題3:In the study,the children________.
A.were all 3­year­oldsB.were asked to watch adult TV shows
C.played for an hour while the TV was onD.played with more than one toy
小題4:What does the study show?
A.Children pay much attention to adult TV shows.
B.Children should be allowed to watch TV for kids only.
C.The background TV noise affects children’s ability to focus.
D.The more toys a child has,the shorter time he plays with each one.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

We had known for along time that flowers of different plants open and close at different time of day. Yet no one really understands why flowers open and close like this at special time. The question is not as simple as we might think, as recent experiments have shown. In one experiment, flowers were kept in constant (持續(xù)的)darkness. We might expect that the flowers ,without any information about the time of the day, did not open as they usually do. In fact, they continue to open at their usual time. This shows that they have some special ways of knowing the time. Their sense(感覺(jué)) time does not depend on information from the outside world. It is inside them: a kind of "inner (內(nèi)部的)clock". This discovery may not seem to be very important. However, it is later found that not just plants but animals have this "inner clock" which control(控制)the working of their bodies and influences their activities. Human beings, then, are also influenced by it. Whether we wish or not, itaffectssuch things in our life as our need for sleep or need for food.
小題1:Before the experiment arrived at a conclusion, people had thought that the flowers would____.
A.never open in constant darkness
B.change their usual time to open
C.open ahead of the time as they usually did
D.continue to open at usual time
小題2:The sense of time that flowers have is connected with_____________.
A.its age and size
B.light and temperature
C.a(chǎn) kind of strange power(力量)inside them
D.some unknown information from the outside world
小題3:What will happen if we make good use of the "inner clock"
A.We'll need less sleep or food.
B.We'll be able to sleep as long as we wish to.
C.We'll be able to change our work time when necessary.
D.We'll have more energy to do our work better.
小題4:What's the Chinese meaning of the underlined word" affects"
A.產(chǎn)生B.影響C.給予D.依賴(lài)

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Mobile phones are an important business tool for farmers in rural areas. But they also put a valuable educational tool in their hands.
The University of Illinois in the United States has a project called SAWBO—Scientific Animations Without Borders. It produces educational videos that can be downloaded to cell phones. The goal is to help people in developing countries improve their lives.
One video shows farmers how to make a natural insecticide from neem seeds to prevent insect damage to crops. The process starts with sorting and drying the neem fruits. Then let the fruit dry in the sun for about three or four days, until they become brown. Using a mortar(碾槌) and stick, the fruits are slightly pounded to remove the shells from the fruits without breaking the seed inside.
The videos use computer animation(動(dòng)畫(huà)). Some of the animated characters are a little funny looking-like a farmer with a long nose. But the subjects are serious, including a health video on preventing cholera(霍亂). Team member Francisco Seufferheld says the information in the videos is meant to be quickly understood. He says, “The information is digested in such a way that in two minutes, we can transmit a complex idea.”
The researchers tested the seven-minute video on seven mobile phones. They wanted to see if people would share the video using Bluetooth wireless technology. With Bluetooth, files can be passed to a nearby phone even if neither phone is connected to the Internet. As a result, in one month, the video had spread to one hundred eighteen people in fifty different villages. “This is just incredible impact,” said Francisco Seufferheld.
The team has made a few videos so far. These are available in a total of eighty languages, dialects and accents. Professor Barry Pittendrigh says there are plans for more videos later this year.
小題1:What is the text mainly about?
A.A best-selling mobile phone
B.A valuable educational project for farmers
C.United States support for developing countries
D.A new type of scientist –farmer relationship
小題2:The SAWBO program is introduced in order to ____.
A.raise farmers’ standard of living
B.do some research on mobile phones
C.develop farmers’ practical skills
D.help farmers prevent insect damage to corps
小題3:The biggest advantage of the program is that it______.
A.includes health video on preventing cholera
B.can be passed to farmers using Bluetooth technology
C.can be used to sort and dry the neem fruits
D.is easy for farmers to understand
小題4:Which of the following words can best take the place of the word “ pound” in the 3rd paragraph?
A.movedB.beatC.pickedD.cut

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

A Book Review—The Snake-Stone by Berlie Doherty
The setting: Urban England (the cities), but also rural England (the countryside) including remote English villages.
The theme: The main theme is a teenage research of self-discovery, in this case the search for a mother from whom the hero was separated at an early age.Its other concerns are love, getting on with others, being persistent and courageous and trying to deal with doubts, troubles and worries.As the book moves to a close, James’ swimming coach says to him: “You are not like a kid obeying instructions any more.You are diving like a young man who knows where he is going.”
The characters: James is the hero of the story.He is a championship diver, and has a comfortable life with his foster parents (養(yǎng)父母).Yet he also has the qualities to take him on a long journey to find his birth mother.The other characters in The Snake-Stone, James’ parents, his diving instructor, best friend, the villagers, people he meets on his journey, are pictured realistically.
The turning point: The turning point in the story comes while James’ foster parents are away in London, and he wonders about the identity of his birth mother.The only clue he has is a fossil, “the snake stone” which she left behind along with a note on which she had written: “Take good care of Sammie.It was written on a torn envelope with parts of an address still there.
The journey: Instead of going to London, James decides to find his birth mother.With help from his geography teacher, James sets out for the remote country village where his mother might be found.James has painful, challenging, but also humorous and happy travels.The mother he finally meets, Anne, has a minor yet powerful voice in the novel.He comes to understand why she left him at a stranger’s door fifteen years before.Although the meeting is not long, it leaves him with a feeling of completeness.As a journey of self-discovery The Snake-Stone also provides its readers with a happy ending.Its hero says, on returning to his foster parents, “I was home.”
小題1:What is the main theme of the novel?
A.A journey of self-discovery.
B.Life in the world of diving.
C.Life with foster parents.
D.A travel around the country.
小題2:What do the coach’s words in Paragraph 2 suggest?
A.James is a successful diver.
B.James is an independent young man.
C.James is an outgoing young man.
D.James is a hopeful swimmer.
小題3:The snake stone in the novel is        
A.a(chǎn) stone with an address on it
B.a(chǎn) gift from the swimming coach
C.a(chǎn) clue left by the birth mother
D.a(chǎn) fossil left by the foster parents
小題4:Which of the following is true about the novel?
A.The story has a sad ending.
B.The story takes place in the city of London.
C.The characters are vividly described.
D.The turning point comes after the hero meets his birth mother.
小題5:It can be concluded that James’ journey is _________.
A.disappointingB.boringC.comfortableD.worthwhile

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Researchers at the University of Bedforshire have developed a new technique for powering electronic device(裝置). The system, developed by Professor Ben Allen at the Centre for Wireless Research, uses radio(無(wú)線(xiàn)電) waves as power.
Believed to be a world first, the team claims it could eventually eliminate (or get rid of )the need for conventional batteries. The university has now filed a patent application to secure the only rights to the technique.
Professor Allen and his team have created a system to use medium wave frequencies to replace batteries in small everyday devices like clocks and remote controls.
The new technique uses the “waste” energy of radio waves and has been developed as part of the university’s research into “power harvesting”. Professor Allen said that as radio waves have energy―like light waves, sound waves or wind waves―then, in theory, these waves could be used to create power.
“The emerging(新興的)area of power harvesting technology promises to reduce our reliance on conventional batteries,” he said. “It’s really exciting way of taking power from sources other than what we would normally think of.”
The team is now waiting for the results of the patent application to secure recognition of the technique. Professor Allen said that the team’s achievements had all been done in their “spare time”. “Our next stage is to try and raise some real funds so that we can take this work forward and make a working prototype(模型)and maybe partner up with the right people and take this to a full product in due course,” he said.
“Power harvesting has a really important part in our future, because, just in this country, we dispose of somewhere between 20,000 and 30,000 tonnes of batteries in landfill(垃圾填理)sites every single year-that is toxic chemicals going into the ground.”
He added that development of the product could also be “commercially beneficial”. “The market for this is several billion pounds. We’ve seen market predictions for 2020 which have these kinds of figures, so there’s a lot of commercial potential in this area,” he said.
Pro-Vice Chancellor at the University of Bedfordshire, Professor Carsten Maple, said, “This type of work is a reflection of the university’s growing reputation and experience in conducting innovative(創(chuàng)新的)research.”
小題1:From the text we know the new technique for powering electronic devices_____.
A.can be applied to all electronic devices.
B.uses radio waves to create power.
C.has replaced conventional batteries.
D.produces many toxic chemicals.
小題2:According to Professor Allen, power harvesting technology______.
A.makes every use of radio waves.
B.takes power from usual sources.
C.reduces our dependency on conventional batteries.
D.a(chǎn)ims at huge commercial benefits.
小題3:What can we learn about Professor Allen and his team from the text?
A.They have made use of radio waves in their daily life.
B.They have raised a big fund to support their research.
C.They have gained a patent for their new technology.
D.They mainly did their research in their spare time.
小題4:What is Professor Carsten Maple’s attitude toward the new technique?
A.Critical.B.Favorable.C.Conservative.D.Negative.
小題5:What is the text mainly about?
A.A new technique to create power.
B.A crisis concerning conventional batteries.
C.Some special sources of power.
D.The development of power harvesting.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Nuclear energy has always been controversial. But since the tsunami and nuclear disaster in Fukushima (Japan) last year the issue is back in the headlines. And the world is divided— some countries are planning more nuclear plants, while others have promised to shut theirs down.
After Fukushima, Germany decided to switch off all its nuclear plants by 2022. Switzerland and Italy are also phasing out nuclear power. But France and the United States remain staunch supporters of atomic energy. In fact, almost 80% of France’s electricity comes from nuclear power, the highest percentage in the world. And in the US, the Obama administration said it “continues to support the expansion of nuclear power, despite the crisis in Japan.”
Nuclear supporters claim nuclear power can help the environment. Unlike fossil fuels, nuclear power doesn’t create greenhouse gases. So, pro-nuclear countries argue that nuclear power allows them to generate energy without contributing to climate change. Britain’s chief scientific adviser (John Beddington) supports this view. He recently said that the world doesn’t have the luxury of ignoring nuclear energy.
Nuclear power is also relatively cheap. Renewable energy sources such as solar, hydro and wind power may be clean, but they’re expensive; and right now, they require a lot of investment. This higher cost of using “green energy” is usually passed onto the consumer. So, while many people may prefer their energy to come from a renewable source, not so many are prepared to pay higher energy bills. This is of particular concern while the world economy is in such bad shape.
The main argument against nuclear energy is that it isn’t safe. For a start, nuclear waste is very difficult to dispose of, and remains toxic to humans for thousands of years. And even before Fukushima, there were several high-profile nuclear disasters. The most famous is probably the 1986 Chernobyl disaster, in the Ukraine. The radiation from the meltdown spread all over Europe, affecting thousands.
The nuclear energy issue is very complex. And it doesn’t look like it’ll be resolved anytime soon. As a Japanese commentator recently said, “it’s been a bad year for the ‘nuclear village’, but I don’t think they’re down and out yet.” The battle continues.
小題1:Which of the following may NOT be the advantage of nuclear energy over other energy sources?
A.Nuclear energy doesn’t produce any greenhouse gases.
B.Nuclear energy can help prevent the climate damage.
C.Nuclear energy is more environmental-friendly than other green energy sources.
D.Nuclear energy can save the consumers some money, compared to other renewable energies.
小題2:What does the underlined word “this” refer to in paragraph 4?
A.The fact that many people prefer to use the green energy sources while unwilling to pay higher bill.
B.The cost of using renewable sources
C.The fact that the nuclear power is cheaper.
D.The investment of renewable energy sources
小題3:We can learn from the last paragraph that _______.
A.the Japanese commentator is positive about the future of nuclear energy
B.the nuclear energy issue will be soon settled
C.a(chǎn) battle will break out in the future
D.Japan is considering to build a nuclear village in the future
小題4:What is the author’s purpose of writing the passage?
A.To highlight the danger of using nuclear energy.
B.To introduce some serious nuclear disasters.
C.To show the argument between nuclear supporters and protesters.
D.To give some advice on how to use nuclear energy safely.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

In England a woman fell down a stair. Panic followed—178 persons lost their lives. In Michigan a woman fell ill. There was a call for water. Someone thought it meant fire---71 were killed. In Oklahoma an old man’s hair caught fire---36 died.
What should you do to be out of danger?
1. As you sit in any crowd, pick out an exit(出口) which is not the one where most persons enter and plan to use if necessary.
2. If a rush stairs, do not get into it . Stay still. Let it pass. Then go to the exit you have chosen.
3. Do not cry out. Speak quietly. Act calmly.
4.Do not stop for your hat and coat unless they are at hand.
5. If there is smoke, crouch. The best air is about three feet above the floor.
6. When you are outside the building, stay out. Many dead would be alive if they had not returned for something.
7. When you get out, move far from the door so that others can get out.
小題1:The first paragraph tells us that over two hundred people lost their lives because of_________.
A.a(chǎn) fireB.a(chǎn) call for water
C. falling downstairsD.panic
小題2:If you are in a crowd when panic stars, you should ________.
A.run with the others.
B.call for help as loudly as you can.
C.hurry at once to an exit.
D.stay still until the crowd has passed.
小題3:What should you do once out of a place where there is panic?
A.stay outside.
B.go back for your wallet.
C.return to ask people not to run.
D.stand near the exit.
小題4:When you are safe outside a burning building , stay away from the door so that _______.
A.the smoke can get out.
B.you will not get burned
C.others may leave.
D.others may enter.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:完形填空

As I understand, if scientists produced a human clone, there would be a great risk of it having a disease. Nobody seems to understand the ageing process of a clone. It would be terrible if a baby was the age of its parent at     31   . Its cells would grow old fast and it would die young.    32    until the technique is perfectly safe, it should be     33   .
I'd love to have a clone of     34   . I often wish I had a twin sister, someone who    35   me in everything. So why not a clone? Well, the idea    36   be fun but I'm not sure if it would be     37   . I think we would be playing with fire if we let scientists go ahead with     38   cloning. There are so many     39   
involved that all research in this area should be strictly controlled.
There are so many arguments     40    cloning that it is difficult to get anyone to consider the possible benefits. I am     41    that it is a technique which could be beneficial. The most obvious use would be for childless     42   . They would be able to have babies with their own genetic material. I don't see what's wrong with that.
Imagine a child     43    up knowing that his or her mother is really a sister or a brother. The emotional     44    on the child would be     45   . Or a child who was cloned from a dead brother or sister. What kind of emotional pressure would they feel, knowing they were made as a replacement for another? The whole idea
    46    me!
It's all very good to ban human cloning but scientists should be allowed to   47   
research. If they don't, we may     48    important benefits for our society, such as producing body organs. A clone is an     49    copy of a person with the same gene. Therefore, it is the     50    donor for an organ(器官) transplant.
小題1:
A.home B.lab C.process D.birth
小題2:
A.Besides B.Therefore C.Although D.Unless
小題3:
A.banned B.a(chǎn)llowed C.encouraged D.forced
小題4:
A.itself B.herself C.myself D.yourself
小題5:
A.overlookedB.contradicted C.a(chǎn)ccumulatedD.resembled
小題6:
A.may B.must C.can D.shall
小題7:
A.messy B.safe C.swift D.a(chǎn)wkward
小題8:
A.human B.a(chǎn)nimal C.plant D.pet
小題9:
A.obligationsB.regulations C.formulas D.risks
小題10:
A.a(chǎn)gainst B.with C.for D.a(chǎn)mid
小題11:
A.vanished B.convinced C.violated D.teased
小題12:
A.couples B.heroines C.dwarves D.elves
小題13:
A.picking B.looking C.getting D.growing
小題14:
A.pressure B.sample C.privilege D.a(chǎn)mbition
小題15:
A.unsinkableB.unimaginable C.unbearable D.unthinkable
小題16:
A.scratchesB.terrifies C.entices D.confronts
小題17:
A.continue B.predict C.tear D.mention
小題18:
A.chase B.contrast C.cure D.miss
小題19:
A.handy B.identical C.contradictory D.transparent
小題20:
A.ideal B.voluntary C.vacant D.inquisitive

查看答案和解析>>

同步練習(xí)冊(cè)答案