Antarctic __________ we know very little is covered with thick ice all the year round.

A. which 　　　B. where 　　　　　C. that 　　　　　 D. about which

D

定語(yǔ)從句拆開(kāi)小分句應(yīng)為“we know very little about Antartic.”。

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： 題型：閱讀理解

Antarctic seabirds are breeding（繁殖）later, because thinner sea ice is causing their food supplies to decline, a new study says. The birds, which nest in East Antarctica, have delayed their spring arrival by an average of nine days and egg-laying by an average of two days over the past 50 years, according to polar researchers from the French National Center for Scientific Research in Villiers en Bois, France, study authors Christophe Barbrand and Henri Weimerskirch attribute this later breeding activity to decreases in sea ice caused by climate change.

The researchers say the disappearing sea ice, combined with a longer sea-ice season, has interfered with the birds’ breeding cycle by reducing the amount of krill（磷蝦） and other prey（獵物）available in early spring in Antarctica. Because Antarctica’s seasons are opposite those in the Northern Hemisphere, spring on the icy continent begins in October.

The study is based on data collected at seabird colonies between 1950 and 2004 in Adélie Land, on the eastern edge of the frozen continent.

The findings were published in the journal Proceedings of the National Academy of Sciences.

Of the nine species studied, some arrived up to 30 days later than they had in previous years.

Despite much later arrivals, the birds are laying their eggs at pretty much the same time as they had in the past. In the most extreme cases, birds were laying their eggs an average of 3. 7 days later in the season than they were 50 years ago.

56. What is the passage mainly about?

A. Seabirds are breeding later in East Antarctica.

B. The amount of krill in the ocean has decreased.

C. The weather in Antarctica has changed.

D. The spring in Antarctica is beginning later.

57. Why have the seabirds in East Antarctica delayed their breeding?

A. The food there has been polluted.

B. The sea ice doesn’t shrink any more.

C. The food supplies there have declined.

D. There are too many seabirds there.

58. In which of the following months is it autumn in Antarctica?

A. October.                                                     B. September.

C. November.                                                  D. June.

59. How many kinds of seabirds were studied by the researchers?

A. Two.                B. Five.                             C. Nine.                       D. Thirty.

60. What does the underlined word “attribute”in Para. 1 mean?

A. contribute                                                    B. cause

C. owe                                                                   D. devote

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2010年福建省普通高中畢業(yè)班質(zhì)量檢查（英語(yǔ)） 題型：完型填空

完形填空（共20小題；每小題1．5分，滿(mǎn)分30分）
閱讀下面短文，從短文后備題所給的四個(gè)選項(xiàng)（A、B、C和D）中，選出可以填人空白處的最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。
War, money and power are a few things that countries and people are concerned about.   36  I agree that those things are important，I believe that everyone should start to   37  more on a growing problem — global warming.
Global warming will not only   38 our country and our generation, but a1so the entire   39  and future generations. It is   40  because the weather has been a lot warmer over the past few years, which   41  the melting（融化） of the ice in the Antarctic. This will soon cause water levels to   42  and flood parts of the world.
Many people ignore this problem because they fee1   43   they can’t do anything about it and have more   44  things to worry about. If we al1   45  so，then our ozone layer（臭氧層）will be   46  and the planet will no longer be able to make life continue to exist. We should do our best to limit the use of our planet’s   47  resources（資源）and keep our air clean.   48  , future generations will suffer from our   49  .
Some might feel that they can't stop global warming from   50  But if every single person does his or her part in keeping the air clean. then it will become a   51  effort. Sure, there are some things that cause pollution and that we won’t be able lo   52  change. This may include cars burning oil，but we can   53  adjust some of these things. People can start carpooling, taking the bus, riding their bikes, or .   54  just walking.
If everyone takes   55  now, I believe we can start seeing remarkable results within a few years.
36．A．When                   B．As                C．How                                               D．Though
37．A．depend                B．focus                   C．hang                                      D．remark
38．A．a(chǎn)nnoy                   B．interrupt             C．a(chǎn)ffect                                      D．confuse
39．A．world          B．continent            C．industry                       D．climate
40．A．failing                   B．completing                  C．changing                     D．occurring
41．A．lies in          B．results in             C．suffers from              D．escapes from
42．A．reduce                 B．rise                               C．drop                                       D．move
43．A．a(chǎn)s if             B．in case                          C．even though                        D．if only
44．A．popular                B．suitable                        C．important                            D．difficult
45．A．do                        B．keep                              C．like                                         D．find
46．A．protected  B．strengthened              C．destroyed                            D．surrounded
47．A．unlimited   B．natural                          C．recycled                      D．industrial
48．A．Therefore  B．Otherwise          C．However                              D．Instead
49．A．illnesses     B．failures                         C．decisions                     D．mistakes
50．A．continuing B．a(chǎn)rriving                         C．improving                             D．disappearing
51．A．physical               B．mental                          C．national                                 D．worldwide
52．A．slightly                 B．fully                      C．hardly                                     D．slowly
53．A．a(chǎn)t least                B．a(chǎn)t most                         C．a(chǎn)t first                                    D．a(chǎn)t last
54．A．yet                       B．even                              C．still                                 D．thus
55．A．time                    B．turns                    C．a(chǎn)ction                                    D．a(chǎn)rms

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2011－2012學(xué)年江蘇省濱海中學(xué)高二上學(xué)期期中考試英語(yǔ)卷 題型：閱讀理解

The emperor penguin is the tallest and heaviest of all living penguin species and lives in Antarctica. The male and female are similar in size, reaching 122 cm in height and weighing anywhere from 22 to 45 kg. The back and head are black, contrasting sharply with the pale-yellow breast and bright-yellow ears. Like all penguins, it is flightless, with a streamlined body and their wings stiffen and flatten into flippers(鰭狀肢) for a marine habitat.
Its diet consists primarily of fish, but can also include animals with hard shells. In hunting, the species can remain underwater up to 18 minutes, diving to a depth of 535 m. Its unusually structured hemoglobin(血紅蛋白)allows it to function at low oxygen levels.
The emperor penguin is perhaps best known for the journeys adults make each year in order to mate and to feed their babies. The only penguin species that breeds(繁殖) during the Antarctic winter, it goes on a long journey of 50-120 km over the ice to breeding areas which may include thousands of individuals. The female lays a single egg, which is incubated(孵化)by the male while the female returns to the sea to feed; parents take turns searching for food at sea and caring for their chick. They both care for the chick until it is able to enter the water to find food on its own. During the process of incubation, the male can lose up to 1/3 to 1/2 of his body weight. One of the coolest things about the male is that if the chick comes out its egg before the female returns, the male can actually produce a special liquid to feed the chick. He can only do this for a short time. If the female doesn’t return, he must leave the chick to go on with his own life. The emperor penguin can typically live for 20 years in the wild, although observations suggest that some individual may live to 50 years of age.
【小題1】We can learn from paragraph 1 that ____.

A．the emperor penguin is the world’s largest kind of penguin
B．the emperor penguin has pale-yellow ears
C．the male and female emperor penguins are of different sizes
D．the emperor penguin lives in the most northern area on the Earth
【小題2】The emperor penguin can stay underwater for a long time mainly because of its ____.
A．strong wingsB．streamlined bodyC．structured hemoglobinD．special diet
【小題3】The emperor penguin differs from other penguin species in that ____.
A．it gives birth in the Antarctic winterB．it feeds mainly on fish
C．the male won’t search for food on his ownD．it can only live for a short time
【小題4】According to the passage, ____.
A．the egg of the emperor penguin is mainly incubated by the female
B．many emperor penguins will stay together to breed
C．the male emperor penguin will give up his own life to feed the chick
D．the female emperor penguin will leave the chick forever once it lays an egg

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2012屆四川省綿陽(yáng)南山中學(xué)高三九月診斷考試英語(yǔ)卷 題型：閱讀理解

Far from the land of Antarctica (南極洲), a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod.
For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a comfortable place to work and research has been slow. Now it seems we have an answer. Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish’s blood and measured its freezing point. The fish were taken from seawater that had a temperature of -1.88°C and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to -2.05°C. That small difference is enough for the fish to live at the freezing temperature of the ice-salt mixture.
The scientists’ next research job was clear: Find out what in the fish’s blood kept it from freezing. Their search led to some really strange thing made up of a protein (蛋白質(zhì)) never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperature. When it was put back, the blood again had its antifreeze quality and a lowered freezing point.
Study showed that it is an unusual kind of protein. It has many small sugar molecules held in special positions within each big protein molecule. Because of its sugar content, it is called a glycoprotein. So it has come to be called the antifreeze fish glycoprotein, or AFGP.
【小題1】 What is the text mainly about?

A．The terrible conditions in the Antarctic.B．A special fish living in freezing waters.
C．The ice shelf around Antarctica.D．Protection of the Antarctic cod.
【小題2】Why can the Antarctic cod live at the freezing temperature?
A. The seawater has a temperature of -1.88°C.   B. it loves to live in the ice-salt mixture
C. A special protein keeps it from freezing.  
D. Its blood has a temperature lower than -2.05°C.
【小題3】What does the underlined word “it” in Paragraph 5 refer to?
A．A type of ice-salt mixture. B．A newly found protein.
C．Fish blood. D．Sugar molecule.
【小題4】What does “glyco-” in the underlined word “glycoprotein” in the last paragraph mean?
A．sugar B．ice C．blood D．molecule

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：福建省泉州一中2009-2010學(xué)年高一下學(xué)期期中考試英語(yǔ)試題 題型：閱讀理解


The USA, New York —Whales and dolphins are facing increasing threats from climate change, according to a new report published by WWF and the Whale and Dolphin Conservation Society（WDCS）.
The report “Whales in hot water?” draws attention to the growing impacts of climate change on whales. They range from changes in sea temperature and the freshening of the seawater because of the melting of ice and increased rainfalls, to a sea level rise, loss of icy polar habitats and the decline of krill populations in key areas. Krill, a tiny shrimp that is dependent on sea ice, is the main source of food for many of the great whales.
The speeding up of climate change adds greatly to trouble from other human activities, such as chemical and noise pollution, which kills some 1000 whales every day.
“Whales and dolphins have an ability to adapt to their changing environment,” said Mark Simmonds, International Director of Science at WDCS. “But the climate is now changing at such a fast pace that it is unclear to what extent whales and dolphins will be able to adjust.”
Climate change impacts are currently greatest in the Arctic and the Antarctic. According to the report, cetaceans that rely on polar, icy waters for their home and food resources are likely to be greatly affected by the reduction of sea ice cover.
WDCS and WWF are urging governments to cut global production of CO2 by at least 50 percent by the middle of this century. The latest report of the Intergovernmental Panel on Climate Change showed it was possible to stop global warming if the world’s emissions start to decline before 2015.
1. From the passage, we can learn that whales mainly feed on ______.
A. dolphins       B.krill         C. sea horses       D. sharks
2. Which of the following has the same meaning as the underlined word “decline” (in Para 2)?
A. produce         B. develop       C. fall         D. increase
3. In what place is climate change greatest?
A. Two polar areas.                       B. Asia.
C. The pacific ocean.                    D. Equator.
4. Which of the following is not true according to the passage?
A. Climate change will lead to the changes in sea temperature.
B. Climate change will result in the freshening of the sea water.
C. Climate change will have a bad effect on human activities and whales.
D. Human beings will forever have no ability to stop global warming

查看答案和解析>>

同步練習(xí)冊(cè)答案