With petroleum reserves (石油儲量) decreasing，the search is on to replace gas with a cleaner，greener alternative.Though much eco－talk has centered on biofuels from corn and soybeans，the biofuel that looks more likely to replace petroleum comes from a most unlikely source：algae (藻類)．
Algae，like corn，soybeans，and other crops，grow via photosynthesis (光合作用) and can be processed into fuel oil.However，they yield 30 times more energy than land crops such as soybeans，according to the U．S.Department of Energy.Many algae species also can grow in saltwater and polluted water－while corn and soy require arable land and fresh water that will be in short supply as the world's population balloons.
“If you replaced all the diesel (柴油) in the U．S.with soy biodiesel，it would take half the land mass of the U．S.to grow those soybeans，”says Matt Caspari，chief executive of Aurora Biofuels，a Berkeley，Calif.－based private firm that specializes in algae oil technology.On the other hand，the Energy Department says that if algae fuel replaced all the petroleum fuel in the United States，it would require 15,000 square miles，which is a few thousand miles larger that Maryland (12,407 square miles)，the 42nd state in land area.
Another bonus：Because algae can be grown just about anywhere in a closed space，they 're being tested at several power plants across the nation as a carbon absorber.Smokestack emissions (煙囪排放物) can be pumped directly into the ponds，feeding the algae while keeping greenhouse gases out of the atmosphere.
Although processing technology for algae fuel—also known as “oilgae” in some environmentalist circles—is improving，it's still years away from reaching your local gas pump.“It's just a question of cost，because no large－scale facilities have been built yet，” Caspari says.
小題1:The underlined word “yield” in Paragraph 2 can be replaced by “________”．
A．controlB．require
C．produceD．grow
小題2:Compared with corn and soybeans，algae ________.
A．may pollute water and soil
B．can grow in poor conditions
C．provide much less energy
D．need more special care
小題3:According to Paragraph 3，one of the advantages of algae fuel is that ________.
A．it can be used more widely
B．it is more easy to produce
C．it needs much less land
D．it costs much less money
小題4:What do we learn about algae from Paragraph 4?
A．Algae help protect the environment.
B．People can grow algae anywhere.
C．Fish can get more oxygen from algae.
D．Algae produce less waste.

小題1:C
小題2:B
小題3:C
小題4:A

小題1:C　[詞義理解題。此處根據(jù)這句話的意思可以推斷出它們產(chǎn)生的能量比大豆之類的農(nóng)作物要多30倍。因此答案C正確。]
小題2:答案　B　[細(xì)節(jié)推斷題。根據(jù)第二段第三句的can grow in saltwater and polluted water和require arable land and fresh water可知，玉米和大豆需要有良好的環(huán)境才能生長，而藻類在較差的環(huán)境下也能夠生長。]
小題3:答案　C　[細(xì)節(jié)理解題。根據(jù)第三段最后一句On the other hand...the 42nd state in land area可知，如果藻類燃料全部代替美國的石油燃料，所需土地比馬里蘭州的面積多一些，而該州面積僅居全美國第42位。聯(lián)系本段第一句的it would take half the land mass of the U．S. to grow those soybeans可知，生產(chǎn)藻類燃料僅需很少的土地。]
小題4:答案　A　[推理判斷題。根據(jù)第四段第二句Smokestack emissions can...of the atmosphere 可知，煙囪排放物能夠直接排入養(yǎng)殖著藻類的池塘，既向藻類提供了養(yǎng)料，又防止了溫室氣體污染大氣。可見，藻類對保護(hù)環(huán)境有利。]
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：完形填空

閱讀下面短文，掌握其大意，然后從36—55各題所給的四個選項（A、B、C、D）中，選出最佳選項。
The Orkney Islands are about 14 kilometres from the north coast of Scotland. They are mostly low-lying, except for Hoy which has the highest sea cliff(峭壁) in Britain. The   36 and the climate are good in Orkney,  37 there are a lot of farms.
To get to Orkney you have to fly or go by  38 . Ships bringing passengers come from Aberdeen every week. They also bring food, machines and so on. Most Orkney farmers   39  cows or sheep. Because of this, grass is the most  40 crop on the islands. One of the islands has sheep which  41 sea plants   42  grass---they are  43 , but very strong and healthy.
Many people in the Orkney Islands are fishermen. Some go a long way out to  44 to catch large fish,   45 others catch  46 like crabs(螃蟹) and lobsters(龍蝦)，near the shore. The islanders  47 the crab meat and then pack it and send it to the  48 . They do not cook the lobsters. They send them  49 to restaurants in many of the large  50 of Europe. Most of the islands have their own  51 but of course some of them are very small---with only one group of children from five to ten years old. In fact there are  52 young people at all on the quietest islands. Usually they go the main town of Kirkwall,  53 modern lives.
Some people come from other parts of Britain to find a  54 life on the islands. Everyone is very friendly and they all know each other. Things are changing slowly, but the old way of life   55 continues.
36．A．land         B．hill         C．mountain     D．forest
37．A．yet          B．but          C．or           D．a(chǎn)nd so

 

 
38．A．train        B．bus        C．boat         D．car

39．A．feed         B．buy         C．kill         D．like
40．A．useless      B．harmful      C．important    D．unimportant

 

 
41．A．drink        B．eat          C．produce      D．plant

42．A．instead of   B．instead      C．for          D．with
43．A．small        B．big          C．large        D．tall
44．A．field        B．sea          C．sky          D．space
45．A．when         B．since            C．while           D．for
46．A．birds        B．tigers           C．lions            D．shellfish
47．A．cook         B．burn            C．sell            D．buy
48．A．desert       B．ship            C．island          D．mainland
49．A．a(chǎn)lone        B．a(chǎn)live            C．a(chǎn)bout            D．a(chǎn)sleep
50．A．libraries    B．lakes            C．cities           D．banks
51．A．zoos         B．colleges        C．schools         D．universities
52．A．very few     B．a(chǎn) lot of        C．a(chǎn) great many    D．a(chǎn) number of
53．A．live         B．to live         C．living          D．lives
54．A．happy        B．busy            C．quiet            D．noisy
55．A．a(chǎn)lso         B．still            C．never            D．nearly

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

BRISBANE—Australian Olympic chief John Coates has said Greek athlete Katerina Thanou should not be awarded the Sydney Olympics 100 metres gold medal handed back by Marion Jones.
Jones, who this week admitted to steroid（類固醇）use in the build up to the Sydney Games, has returned the three gold medals and two bronzes she won in 2000.
But Thanou, the silver medalist in Sydney, was herself banned for two years after she failed to appear for a drug test at the 2004 Athens Olympics.
“I’d like to think that Katerina Thanou would not be awarded the gold medal,” Coates told the Australian Associated Press on Tuesday, “but there may be some legal difficulties for the International Olympic Committee (IOC) to overcome in order to reach that conclusion.”
Jamaica’s Tayna Lawrence won the 100m bronze medal in Sydney behind Jones and Thanou.
Coates also said he expected the United States Olympic Committee (USOC) to hand back the medals won by the women's 4x100m and 4x400m relay teams.
Two of Jones’s team mates in the 4x100m team which finished third in Sydney, Torri Edwards and Chryste Gaines, have also served doping（興奮劑）bans.
The U.S. women’s 4x100m relay team won the gold medal ahead of Jamaica and Russia.
“On the relays, it’s my expectation that the United States Olympic Committee will be required to also hand back the medals won by the other ladies who competed with Jones in the two relays,” Coates said.
“That is normal practice.”
The United States Olympic Committee (USCO) has publicly apologized to the organizers and competitors of the 2000 Sydney Games and the Australian public for Jones’s actions.
As part of the USOC’s apology, president Peter Ueberroth promised that the U.S. would send a clean team to next year’s Beijing Olympics.
1. What is the best title of the passage?
A. Jones has returned the Sydney medals
B. Thanou should not receive Sydney gold
C. Steroid use at Sydney Olympics
D. The U.S would send a clean team to Beijing Olympics.
2. Thanou should not get the Sydney gold medal because________.
A. she didn’t pass the drug test.
B. she served doping ban at Sydney Olympics.
C. she didn’t take the drug test at Sydney Olympics.
D. she ran second at Sydney Olympics.
3. Which of the following statements is True?
A. Jones has got five gold medals at Sydney Olympics.
B. The USCO has returned medals in the two relays.
C. Thanou should receive Sydney gold medal.
D. Jones also took part in the women’s 4x100m relay race.
4. Why did Coates expect the USOC to hand back the medals won in the relay races?
A. Because the IOC required them to do so.
B. Because they didn’t take the first place in the relay races.
C. Because some of the runners of the U.S served doping bans.
D. Because they felt sorry for Jones’s actions.
5. What would probably happen next according to the passage?
A. Thanou would receive Sydney gold.
B. Jamaica’s Tayna Lawrence would receive Sydney gold.
C. Thanou wouldn’t be allowed to take part in the Beijing Olympics.
D. Fewer or no American athletes will serve doping drugs in Beijing Olympics.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Starting high school means many changes in your life．Most teenagers look forward to the first day of high school，but still feel a little bit nervous．In order to make your high school life easier, you can follow these tips．
Learn all you can about your first day before the first day．Take part in some activities that are held at the school for new students to know the school better．If parents are invited to these activities, take yours with you．Carefully look over all the materials you receive．Be sure you know where the school’s buildings are．
Get the things you will need for class．Buy the things suggested on your teachers’ supply lists and place your materials for each class separately．
Keep up with your high school workload(工作量)．If you fmd you’re not doing well in a subject，make use of after-school study groups or ask your teacher to help you with your schoolwork．Consider private tutoring to get you through a difficult time．
There’re more extracurricular(課外的)activities in high school than in middle school，such as clubs，music and theater groups，student government，and sports teams． Make friends and be seen at such school activities．Join a club or other organizations to meet people and develop friendships．Ask someone in school activities if you don’t know how．This is a good time to do what you like doing and an opportunity to try new things．Whe said school has to be aH work and no play?
Since you’ll attend more activities in high school than in middle school，you’ll have to learn how to manage your time．
小題1: The writer wrote this passage to        .
A．a(chǎn)dvise us to study hard in high school
B．tell us how to live an easier life in high school
C．show that we may live a hard life in high school
D．explain why there will be many changes in high school
小題2: In Paragraph 2，the writer suggests that we should      ．
A．a(chǎn)sk our parents to walk us to school
B．a(chǎn)sk other students about our high school
C．prepare all the things we need for our classes
D．1earn about our high school well before attending it
小題3: According to Paragraph 4，what should we do if we are not doing well in a subject?
A．We should get help from others．
B．We should stop going to activities．
C．We should spend most of our time on it．
D．We should give it up if it is not important．
小題4: In Paragraph 5．the writer wants to tell us that   ．
A．every coin has two sides
B．the early bird catches the worm
C．where there is a will, there is a way
D．a(chǎn)ll work and no play makes Jack a dull boy
小題5: What will the Writer most probably talk about next?
A．How to manage time well in high school．
B．Why we need to learn how to manage time．
C．How to attend more activities in high school．
D．Why middle school is difierent from high school．

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Believe it or not, going to school is not a legal(法定的) requirement in the United States. It
is a legal requirement that all kids be educated, though. When parents believe they can give their kids a better education--- or have other reasons for not wanting to send their kids to a local school --- they may choose home schooling.
However, if a kid hates school, home schooling is probably not the escape he is looking for. Home schooled students can learn just as much as they would in regular school if they and their parents work hard to cover all the subjects and experiences necessary. Parents who home school usually have higher levels of education than parents who do not. They already have the skills to educate themselves about teaching their kids.
Parents who home school have to be able to put the time and skill into not just teaching, but also researching lesson plans and resources(資源). So they have to know how to find the information necessary to teach their kids. State schools often provide home-schooling parents with a curriculum(課程), books and materials and places to meet. Some state schools will point parents to other resources for brushing up on forgotten subjects. Or parents may receive continuing education at local colleges or universities.
小題1:According to American law, _______________. 
A．a(chǎn)ll kids shall go to school
B．a(chǎn)ll kids must receive education
C．home schooling parents shall receive continuing education
D．state schools must give support to home-schooling parents
小題2: According to the text, most home-schooling parents________________.   
A．a(chǎn)re short of money B．dislike schools
C．used to work as teachers D．a(chǎn)re well-educated
小題3: Which of the following is NOT true about parents who home school?
A．They should have enough time.
B．They should have some skills in teaching.
C．They must receive special curriculums at the university.
D．They have to be able to know lesson plans and resources.
小題4: The underlined phrase “brushing up on” in the last paragraph can best be replaced by _____.
A．reviewingB．changing
C．choosingD．discussing
小題5: What can be inferred from the text? 
A．Home schooled kids learn fewer.
B．Home schooled kids spend less time studying.
C．Being a home-schooling parent needs a lot of effort.
D．Home schooling will replaced school education.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

All of us eat every day, but most of us don’t understand nutrition(營養(yǎng)). How much do you know about good nutrition? Are the following statements true or false?
1. People who don’t eat meat can stay healthy.
True. As long as people eat enough milk, eggs and meat alternates(替代物), they can get enough protein.
2. Fresh vegetables cooked at home are always more nutritious than canned vegetables.
False. The difference depends more on how vegetables are prepared than whether they are fresh or canned. Vegetables cooked in too much water can lose a large quantity of vitamins.
3. Food eaten between meals can be just as good for health as food eaten at regular meals.
True. Nutritional value depends on what types of food you eat, not when you eat them. Eating an egg or an orange between meals can contribute to a good diet.
4. Taking extra vitamins beyond the recommended daily allowances won’t give you more energy.
True. It’s widely believed that extra vitamins provide more energy. But taking more than the baby needs doesn’t make it function better, just as overfilling your gas tank doesn’t make your car run better.
5. Natural vitamins are better supplements(補(bǔ)充)for the diet than synthetic vitamins.
False. There is no difference. A vitamin has the same properties(性質(zhì))and specific chemical structure whether made in a laboratory or taken from plant or animal parts.
6. Older people need the same amount of vitamins as younger people.
True. Older people need the same quantity of vitamins as younger people although they need fewer calories. Certain illnesses raise the requirements for some vitamins, but that is true for the young as well as the old.
7. Food grown in poor soil is lower in vitamins than food grown in rich sold.
False. The vitamins in our foods are made by the plants themselves. They don’t come from the soil.
However, the minerals in a plant depend on the minerals in the soil.
If you have answered these questions correctly, you can say you know much about food and nutrition by today’s standards. But remember that nutrition is a growing science and that may be aged as new information is obtained.
小題1:The main purpose of the passage is to           .
A．list today’s standards of some food and nutrition
B．introduce what should be eaten and what not
C．explain what is helpful to your health and what is not
D．test our nutrition IQ by judging the problems listed
小題2:From the surrounding words and sentences we know that the underlined phrase “contribute to” means         .
A．help to bring aboutB．take the place of
C．make room forD．turn to
小題3:The underlined word “synthetic” most probably means       in Chinese.
A．不同的B．特別的
C．合成的D．天然的

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Chinese International School
Application Form
Before an applicant can be invited to take part in an assessment, an application form should be returned to the Admissions Office, and the application fee of HK$1,000 cannot be returned. For overseas applicants wishing to pay in currencies other than HK dollars, the fee is US$145. Checks are also good for payment to “Chinese International School”.
The application should include:
※ Applicant’ academic report from the last school year.
※ A recent passport-sized photo (attached to the application form).
※ A copy of the applicant’s Hong Kong ID card or a passport showing a valid Hong Kong visa.
※ Only for applicants applying under a Corporate Nomination(提名) Right: A company letter confirming the nomination.
Please note that the application fee is non-refundable. Applicants who would like to re-apply for another academic year are asked to submit a new application and application fee.
Acceptance
Applicants will be informed of their acceptance status in writing by postal mail. Initial (最初的) offers for Reception will be sent out from late March once all assessments have been completed.
Some applicants who have been assessed may be held on a reserve list. Acceptances may also be made on a conditional basis among the applicants on the reserve list.
Applicants who have been assessed but who have not been admitted are welcome to reapply for the next academic year. Please note that such applicants will be asked to submit a new application and application fee.
Confirmation of Acceptance and Enrollment (錄取)
Once an applicant has been admitted, the applicant family will be asked to confirm acceptance and hold the student’s place with immediate payment of the required fees for the Nomination Right (HK$ 500), plus the sum of HK$ 7,500 as the first tuition (學(xué)費(fèi)) payment.
In addition, enrollment will not be considered complete until the following have been received, normally one month before the start of the new school year:
Physical examination results
Tuition (first month)
小題1: According to the passage, if the applicants reapply for an academic year, ______.
A．the application fee can be reduced to a half
B．a(chǎn)pplicants on a reserve list needn’t be assessed
C．the initial application form should be returned to the Admissions Office
D．a(chǎn) new application and application fee are to be required
小題2:Which of the following is true?
A．Once applicants are refused, they can’t apply for it again.
B．Applicants held on a reserve list will not be admitted.
C．The applicants should show either a Hong Kong visa or a Hong Kong ID card.
D．Applicants don’t have to get a company letter to confirm their application.
小題3:How will the applicants possibly be informed of the acceptance status?
A．By fax.B．By e-mail.
C．By regular mailD．By telephone.
小題4:According to the Application Process, the first tuition payment is ______.
A．HK$ 500 B．HK$7, 500
C．HK$1, 000D．US$ 145
小題5:If an applicant has been admitted, the applicant family ______.
A．will be asked to submit a new application
B．will receive physical Examination results
C．will be asked to only pay the first month fee
D．will be asked to confirm acceptance and pay the fees

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Scientists today are making greater effort to study ocean currents (洋流) . Most do it using satellites and other high-tech equipment. However, ocean expert Curtis Ebbesmeyer does it in a special way -- by studying movements of random floating garbage. A scientist with many years’ experience, he started this type of research in the early 1990s when he heard about hundreds of athletic shoes washing up on the shores of the northwest coast of the United States. There were so many shoes that people were setting up swap meets to try and match left and right shoes to sell or wear.
Ebbesmeyer found out in his researches that the shoes — about 60,000 in total — fell into the ocean in a shipping accident. He phoned the shoe company and asked if they wanted the shoes back. As expected, the company told him that they didn't. Ebbesmeyer realized this could be a great experiment. If he learned when and where the shoes went into the water and tracked where they landed, he could learn a lot about the patterns of ocean currents.
The Pacific Northwest is one of the world's best areas for beachcombing(海灘搜尋) because winds and currents join here, and as a result, there is a group of serious beachcombers in the area. Ebbesmeyer got to know a lot of them and asked for their help in collecting information about where the shoes landed. In a year he collected reliable information on 1, 600 shoes. With this data, he and a colleague were able to test and improve a computer program designed to model ocean currents, and publish the findings of their study.
As the result of his work, Ebbesmeyer has become known as the scientist to call with questions about any unusual objects found floating in the ocean. He has even started an association of beachcombers and ocean experts, with 500 subscribers from West Africa to New Zealand. They have recorded all lost objects ranging from potatoes to golf gloves.
小題1:The underlined phrase swap meets in Paragraph 1 is closest in meaning to ______________.
A．fitting rooms
B．trading fairs
C．business talks
D．group meetings
小題2:Ebbesmeyer phoned the shoe company to find out _____________.
A．what caused the shipping accident
B．when and where the shoes went missing
C．whether it was all right to use their shoes
D．how much they lost in the shipping accident
小題3:How did Ebbesmeyer prove his assumption?
A．By collecting information from beachcombers.
B．By studying the shoes found by beachcomber.
C．By searching the web for ocean currents models.
D．By researching ocean currents data in the library.
小題4:Ebbesmeyer is most famous for ___________________.
A．traveling widely the coastal cities of the world
B．making records for any lost objects on the sea
C．running a global currents research association
D．phoning about any doubtful objects on the sea
小題5:What is the purpose of the author in writing this passage?
A．To call people's attention to ocean pollution.
B．To warn people of shipping safety in the ocean.
C．To explain a unique way of studying ocean currents.
D．To give tips on how to search for lost objects on the beach.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Urban citizens(市民)can enjoy a more colorful life than rural citizens.Townspeople are well­informed because they have the easier access to news，while country people are uniformed because these districts are hard to get to.Urban traffic is so well­developed that the residents there often visit exhibitions and parks which are only a short bus ride away. For country people this is a major operation which involves considerable planning.Shopping，a necessary activity in everyday life is more convenient in the city than in the countryside. Townspeople can buy what they want at any time of a day.But rural residents go to town at most once a week.So after shopping they always stagger home loaded with heavy purchases. As for as meals and clothes concerned，townspeople are well­fed and well­dressed as there is an adequate(足夠的)supply of goods.But rural residents are too busy to pay particular attention to them.It is for these reasons that more and more people are moving into the city and looking for a rest there.
On the contrary，some people are attracted by the rural area.Air pollution，noise and overcrowding which are the biggest problems confronting townspeople seem strange for rural residents.Medical studies have proved that rural residents can live longer than urban residents, because they are free from a polluted environment. In addition，the crime rate in the city is several times higher than in the countryside.As is known to all，the life in any city is much more expensive than in the countryside.So the safe, quiet and cheap life in the country appeals to(對……有吸引力)many city residents.
Either an urban or a rural area gives pleasure and trouble.But，I believe，the suburban area has the excellencies(優(yōu)點)of both and is superior to both.As the automobile industry develops，more and more people will make their homes in suburban areas.
小題1:When visiting an exhibition in town，country people have to ________.
A．listen to local news B．take a bus
C．make a careful planD．a(chǎn)sk friends for help
小題2:Paragraph 1 mainly tells us the differences between urban and rural life in ________.
A．communication，traffic and shopping
B．traffic，shopping and diet
C．education，living conditions and housing
D．traffic，medicine and shopping
小題3:According to the passage，rural people are not as well­dressed as urban citizens mainly because________.
A．they live far away from town
B．they live a poorer life
C．they are busy with their work
D．they don't like to dress up
小題4: For rural residents，the problems the urban citizens facing are________.
A．commonB．unfamiliar
C．well­knownD．unimportant

查看答案和解析>>

同步練習(xí)冊答案