Ausubel of Rockefeller University in New York, US. says the key renewable energy sources, including sun, wind and biofuels, would all require vast     1    of land if developed up to large scale production1 – unlike nuclear power. That land would be far better left alone2, he says. Renewables look attractive when they are quite     2   . But if we start producing renewable energy on a large scale, the fallout is going to be horrible. Instead, Ausubel argues     3    renewed development of nuclear.
Ausubel draws his conclusions by analysing the amount of energy renewables, natural gas and nuclear can produce in terms of power per square metre of land used3. Moreover, he claims that as renewable energy use increases, this measure of efficiency4 will     4    as the best land for wind, biofuels, and solar power gets used up.
Using biofuels to obtain the     5    amount of energy as a 1000 megawatt nuclear power plant would require 2500 square kilometres of farm     6   , Ausubel says. "We should be sparing land for nature5, not using it as pasture for cars and trucks," he adds.
Solar power is much more efficient than biofuel in terms of the area of land     7   , but it would still require 150 square kilometres of photovoltaic cells to     8    the energy production of the 1000 MW nuclear plant. In another example, he says meeting the 2005 US electricity demand via wind power alone would need 780,000 square kilometres, an area the size of Texas.
However, several experts are highly critical     9    Ausubel’s conclusions. John Turner of the US government’s National Renewable Energy Laboratory says that     10    the US got all of its power from solar energy, it would still need less than half the amount of land that has been paved over for highways. Further, it need not     11    additional land. The US could get a quarter of its energy just from covering rooftops of     12    buildings, he says.
According to Turner, the same "dual use" also applies to wind power6. "The footprint for wind7 is only 5% of the land that it     13   . Farmers can still farm the land that the turbines are on8. Turner says looking solely at land use is an oversimplification of the     14   . "I’m not sure I’d want to build one of these nuclear plants in Afghanistan9, but we could     15    put in wind and solar power," he adds.
小題1:A. figures       B. amounts          C, unmbers        D. digits
小題2:
A.smallB.hugeC.littleD.vast
小題3:
A.a(chǎn)tB.overC.forD.a(chǎn)gainst
小題4:
A.expandB.minimizeC.enlargeD.decrease
小題5:
A.sameB.similarC.a(chǎn)likeD.identical
小題6:
A.regionB.siteC.a(chǎn)reaD.land
小題7:
A.leasedB.cultivatedC.usedD.purchased
小題8:
A.patchB.matchC.catchD.fetch
小題9:
A.inB.withC.ofD.on
小題10:
A.even ifB.only ifC.what ifD.a(chǎn)s if
小題11:
A.lock upB.take upC.give upD.set up
小題12:
A.toweringB.interestingC.nice-lookingD.existing
小題13:
A.surroundsB.containsC.includesD.covers
小題14:
A.issueB.stuffC.summaryD.suggestion
小題15:
A.doubtfullyB.supposedlyC.certainlyD.honestly

小題1:B
小題2:A
小題3:C
小題4:D
小題5:A
小題6:D
小題7:C
小題8:B
小題9:C
小題10:A
小題11:B
小題12:D
小題13:D
小題14:A
小題15:C

小題1:雖然四個(gè)選項(xiàng)的詞(figures 數(shù)字, amounts 數(shù)量,numbers 數(shù)目,digits 數(shù)碼)都是與數(shù)字有關(guān)的,在 of land 之前,要用 amounts.B 是答案。
小題2:在 "Renewables look attractive when they are quite     ?   . But if we start
producing renewable energy on a large scale, the fallout is going to be horrible"這兩個(gè)句子之間,
有個(gè)連詞 But, 說明兩個(gè)句子的意思相反。后一句說,如果大規(guī)模開發(fā)可再生能源,其后果
十分可怕。既然 "大規(guī)模"、"可怕",前一句填入空格的詞應(yīng)該與之相反。選項(xiàng) A 是 small,
正符合要求,A 是答案。
小題3:Ausubel 是不贊成大規(guī)模開發(fā)可再生能源的。"空3"后出現(xiàn) nuclear, 可以合理地推論出,這是他贊同的能源。所以要選 C 的for.argue by (通過……進(jìn)行爭論), argue over (就……進(jìn)行爭論), argue against (爭論以反對(duì))都不符合上下文的意思。
小題4:前面一句說,Ausubel 對(duì)可再生能源、天然氣和核電廠發(fā)出的電量與其占用土地
的量的比值作一比較。"空4"所在的句子說,隨著風(fēng)力發(fā)電、生物燃料發(fā)電和太陽能發(fā)電占
用的最好的土地逐漸用完,這個(gè)效率比值會(huì)發(fā)生什么變化呢?從 gets used up 分析,效率
比值應(yīng)該變小才對(duì)。所以要選 D的 decrease.minimize (使最小化)不符合上下文的意思。
小題5:從句子的意思和詞的搭配上看,填入 "空5"的詞是選項(xiàng) A 的 same.same…as 是
固定搭配。填入 same 之后,句子的意思也完整了,即:用生物燃料得到與 1000 兆瓦核
電廠相同的能量需要 2500 平方公里的耕地。
小題6:前文說的效率比值都是以 land 為標(biāo)尺,所以這兒要選 A 的  land.
小題7:句子的意思是:按     ?   土地計(jì)算,太陽能的效率比生物燃料的效率高得多 .最適合填入的詞是 C 的 used.其它三個(gè)選項(xiàng) leased (租借)、cultivated (耕種)、purchased (購買)都不符合上下文的意思.
小題8:本題只能選 B 的 match (相匹配),其它三個(gè)選項(xiàng),即 patch (補(bǔ)綴)、catch (捕捉)、fetch (取來)只是與 match 發(fā)音接近,意思與上下文不匹配。
小題9:critical 要求后接 of.C 是答案
小題10:John Turner 是反對(duì) Ausubel 的計(jì)算方法的。從"空10"所在的句子分析, the US got all of its power from solar energy 應(yīng)該是一個(gè)讓步狀語從句,選 A 的 even if 是對(duì)的。此外,only if (決不……除非)、what if (如果……怎么辦)、as if (仿佛)的意思都與上下文搭不上,也佐證了選 A 是正確的。
小題11:本題只能選 B 的 take up (占用),因?yàn)橛蒙?take up 后,上下文的意思就連貫了。其它三個(gè)選項(xiàng),即 lock up(鎖上)、give up (放棄)、step up (加緊)的意思與上下文不匹配。
小題12:句子的意思是:美國僅僅從     ?    大樓的樓頂(鋪設(shè)的太陽能電池板)
中就能得到四分之一的能量。從意思連貫的角度選擇,選項(xiàng) D 的 existing 最符合題意。
小題13:本段第一句用了 "dual use".第二句說風(fēng)力發(fā)電占用土地的百分?jǐn)?shù)(土地的第一
個(gè)用途)。第二句說建有渦輪發(fā)電機(jī)的土地仍然可以用于耕種(土地的第二個(gè)用途)。"空
13"要填的動(dòng)詞應(yīng)該是 D 的 covers (覆蓋)。the land that it (指代 wind) covers, 意為 "
風(fēng)力發(fā)電所覆蓋的土地".
小題14:an oversimplification of the     ?   ,究竟對(duì)什么過度簡單化呢? 從上下文看,應(yīng)該是對(duì)占用土地問題的過度簡單化。選項(xiàng) A 的 issue (問題)正是上下文缺失的詞。stuff (材料)、summary (總結(jié))、suggestion (建議)都不對(duì)。
小題15:句子的前半句是說不會(huì)在阿富汗建造核電站,后半句用 but 開始,說明前半句和后半句的意思相反。前半句用了 I'm not sure,后半句用選項(xiàng) C 的 certainly, 與 not sure 的意思相反,是很合理的。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語 來源:不詳 題型:閱讀理解


Walk through the Amazon rainforest today and you will find it is steamy, warm, damp and thick. But if you had been around 15,000 years ago, during the last ice age, would it have been the same ?For more than 30 years, scientists have been arguing about how rainforests like the Amazon might have reacted(反應(yīng))to the cold ,dry climates of the ice ages ,but until now ,no one has reached a satisfying answer.
Rainforests like the Amazon are important for mopping up CO2 from the atmosphere and helping to slow global warming . Currently the trees in the Amazon take in around 500 million tons of CO2 each year; equal to the total amount of CO2 giving off in the UK each year. But how will the Amazon react to future climate change? If it gets drier ,will it still survive and continue to draw down CO2 ?Scientists hope that they will be able to learn in advance how the rainforest will manage in the future by understanding how rainforests reacted to climate change in the past.
Unfortunately ,getting into the Amazon rainforest and collecting information are very difficult .To study past climate ,scientists need to look at fossilized pollen ,kept in lake muds .Going back to the last ice age means drilling deep down into lake sediments (沉淀 物),which requires specialized equipment and heavy machinery .There are very few roads and paths ,or places to land helicopters and aeroplanes .Rivers tend to be the easiest way to enter the forest ,but this still leaves vast areas between the rivers completely unsampled(未取樣).So far ,only a handful of cores have been drilled that go back to the last ice age and none of them provide enough information to prove how the Amazon rainforest reacts to climate change.
64.The underlined phrase “mopping up” in the second paragraph means      .
A.cleaning up          B.taking in                C.wiping out           D.giving out
65.How will the Amazon rainforest react to future climate change?
A.It’ll get drier and continue to remove CO2 .
B.It’ll remain steamy ,warm ,damp and thick .
C.It’ll get warmer and then colder and drier.
D.There is no exact answer up to present.
66.What’s the main idea of the last paragraph?
A.It’s important to drill deep down into lake sediments to collect information.
B.It’s impossible to prove how climate changes in the Amazon rainforest.
C.It’s hard to collect information for studies of the past climate in the Amazon rainforest.
D.It’s necessary to have specialized equipment and machinery to study the past climate.
67.The best title for this passage may probably be        .
A.Studies of the Amazon                          B.Climates of the Amazon
C.Secrets of the Rainforests                     D.Changes of the Rainforests

查看答案和解析>>

科目:高中英語 來源:不詳 題型:完形填空

There are many similarities between the teacher’s work and the actor’s. However, the fact that a good teacher has some of the gifts of a good actor __1__ mean that he will indeed be able to act well on the stage; for there are very important differences __2__ the teacher’s work and the actor’s work. The actor has to speak words which he has learned __3__; he has to repeat exactly the same work each time he plays a certain part; __4__his movements and the way he uses his voice are usually fixed __5__. What he has to do is to make all these carefully learned words and actions seem natural on the stage.
The good teacher works in __6__ different way. His audience takes an active part in his play, they ask and answer question, they __7__ orders, and if they don’t understand something, they say so. The teacher therefore has to suit his act __8__ the need of his audience which is his class.
I have known many teachers who were fine actors in __9__ but were unable to play a part in a stage-play because their brains would not keep discipline; they could not keep strictly to __10__.
小題1:
A.not
B.don’t
C.doesn’t
D.do
小題2:
A.a(chǎn)mong
B.with
C.from
D.between
小題3:
A.by mind
B.by the mind
C.by heart
D.by the heart
小題4:
A.but
B.if
C.a(chǎn)lthough
D.even
小題5:
A.a(chǎn)go
B.before
C.later
D.long
小題6:
A.very the
B.very a
C.quite a
D.quite the
小題7:
A.listen
B.hear
C.keep
D.obey
小題8:
A.for
B.with
C.to
D.of
小題9:
A.class
B.stage
C.life
D.a(chǎn)ction
小題10:
A.what another has written
B.what another had written
C.that another has written
D.which another had written

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

The bee,like the ant,is a social insect(昆蟲).Bees live in large groups in box-like houses called hives or beehives.Every bee does a certain job that helps the other members of the group.In a beehive there live three kinds of bees:the queen bee,the male bees and the worker bees.The worker bees are born to be hard-working,flying from flower to flower collecting nectar(花蜜),which is made up mostly of sugar mixed with water.Bees draw this nectar into their honey bags where some sort of liquid in their bodies turns the nectar into honey.The newly made honey flows slowly from the bees’ underside and then is stored in small cells in the hive.When the weather turns cold,and there are no flowers for them to collect nectar,the stored honey will see them through the winter months.People who raise bees and depend on bees for a living are thought of as beekeepers.A bee-keeper usually keeps hundreds of hives,and removes honey from hives and keeps it in glass bottles or jars.Honey usually appears as a clear golden-colored liquid,but this lies in the sort of flowers from which bees have taken the nectar.
66.The best title of this passage is_______.
A.The Social Habits of Bees                              B.Three Kinds of Bees
C.The Production of Honey                               D.Bee Keepers’ Work
67.Bees are regarded as social insects because they_______.
A.form themselves into a good organization
B.have learned something from human society
C.need beekeepers to arrange their jobs
D.are born to work hard
68.The color of honey in its final stage depends on the_______.
A.type of flowers which the nectar is taken from
B.amount of sugar the beekeeper gives the bees
C.season in which the nectar is collected
D.quantity of water the bees are able to drink
69.Worker bees are always busy collecting nectar in order to_______.
A.help beekeepers to earn money from honey
B.turn it into honey
C.have something to eat in winter months
D.please the queen bee at the hive
70.During the course in which nectar change into honey_______.
A.water and sunlight are necessary conditions
B.some special liquid inside bees must be in the presence
C.many complex(復(fù)雜的)chemical changes will take place
D.worker bees have to bring up what they collected into their hive

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


     Many children first learn the value of money by receiving an allowance. The purpose is to let children learn from experience at an age when financial mistakes are not very costly. The amount of money that parents give to their children to spend as they wish differs from family to family. Timing is another consideration. Some children get a weekly allowance. Others get a monthly allowance. In any case, parents should make clear what, if anything, the child is expected to pay for with the money.
At first, young children may spend all of their allowance soon after they receive it. If they do this, they will learn the hard way that spending must be done within a budget. Parents are usually advised not to offer more money until the next allowance. The object is to show young people that a budget demands choices between spending and saving. Older children may be responsible enough to save money for larger costs, like clothing or electronics.
Many people think it is not a good idea to pay your child for work around the home. These jobs are a normal part of family life. Paying children to do extra work around the house, however, can be useful. It can even provide an understanding of how a business works.
Allowances give children a chance to experience the three things they can do with money. They can share it in the form of gifts or giving to a good cause. They can spend it by buying things they want. Or they can save it. Saving helps children understand that costly goals require sacrifice: you have to cut costs and plan for the future.
Requiring children to save part of their allowance can also open the door to future saving. A saving account is an excellent way to learn about the power of compound interest. Compounding works by paying interest on interest. So, for example, one dollar invested at two percent interest for two years will earn two cents in the first year. The second year, the money will earn two percent of one dollar and two cents, and so on. That may not seem like a lot. But over time it adds up.
14. Many parents give children an allowance regularly to ______.
A. meet children’s basic need for life        B. give control over their children
C. see whether they have financial mistakes   D. help children learn how to manage money
15. For Children who receive allowances, they’d better not ________.
A. waste money to buy gifts for their parents or friends
B. buy their favorite clothing or electronics for themselves
C. save money like their parents or other adults
D. ask for the next allowance before the decided date.
16. If children are required to save their allowance, they ______.
A. can experience the three things related to money
B. can understand the relation between goals and sacrifice
C. will do more work around the house
D. help themselves found the basis for their future life
17. What does the underlined phrase “compound interest” mean?
A. The interest based on the original money and unpaid interest.
B. A way of helping children earn two percent interest.
C. The interest intended for children to earn money.
D. A saving account opened for children’s allowance.
18. What would be the best title for the text?
A. How to Give Children an Allowance
B. Spend Your Allowance within a Budget
C. Allowance Helps Children Learn about Money
D. Doing Housework Earns Children Allowance

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


Reading to dogs is an unusual way to help children improve their literacy skills(讀寫能力). With their shining brown eyes, wagging tails, and unconditional love, dogs can provide the nonjudgmental listeners needed for a beginning reader to gain confidence(自信心),  according to Intermountain Therapy Animals(ITA)in Salt Lake City. The group says it is the first program in the country to use dogs to help develop literacy in children, with the introduction of Reading Education Assistance Dogs (READ).
The Salt Lake City Public Library is sold on the idea. “Literacy specialists admit that children who read below the level of their fellow pupils are often afraid of reading aloud in a group, often have lower self-respect, and regard reading as a headache,” said Lisa Myron, manager of the children’s department.
Last November the two groups started “Dog Day Afternoon” in the children’s department of the main library. About 25children attended each of the four Saturday-afternoon classes, reading for half an hour. Those who attended three of the four classes received a “pawgraphed” book at the last class.
The program was so successful that the library plans to repeal it in April, according to Dana Thumpowsky, public relations manager.
59.What is mainly discussed in the text?
A.Children’s reading difficulties.              B.Advantages of raising dogs.
C.Service in public library.        D.A special reading program.
60.Specialists use dogs to listen to children reading because they think__________.
A.dogs are young children’s best friends
B.children can play with dogs while reading
C.dogs can provide encouragement for shy children
D.children and dogs understand each other
61.By saying “The Salt Lake City Public Library is sold on the idea”, the writer means the library ______________.
A.uses dogs to attract children           B.a(chǎn)ccepts the idea put forward by ITA
C.has opened a children’s department        D.has decided to train some dogs
62.A “pawgraphed” book is most probably _________.
A.a(chǎn) book used in Saturday classes             B.a(chǎn) book written by the children
C.a(chǎn) prize for the children                  D.a(chǎn) gift from parents

查看答案和解析>>

科目:高中英語 來源:不詳 題型:完形填空

完形填空(共20小題;每小題1分,滿分20分)?
閱讀下面短文,從短文后各題所給的A、B、C、D四個(gè)選項(xiàng)中,選出最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。
It’s only too natural that personal characteristics play a vital role in the development of one's intelligence. But people   36  to realize the importance of cultivating (培養(yǎng)) these factors. The so-called “non-intelligence factors” include one’s   37  , will, motivation, interests and habits. In their studies American psychologists   38  the main cause of differences in intelligence is not intelligence itself, but non-intelligence factors including the desire to learn, will-power and self-confidence.
  39  people know one should have definite objectives, a strong will and good learning habits, quite a number of teachers and parents don’t   40  cultivating these factors.
Some parents are   41  when their children fail to do well in their studies. They blame either genetic factors, malnutrition, or laziness, but they never take   42  consideration these non-intelligence factors. Some teachers don’t inquire into such reasons as   43  students do poorly. They simply give them more courses and exercises, or   44  scold or laugh at them. After all these, students lose self-confidence. Some   45  themselves up as hopeless, feeling defeated. Others   46  take wrong or evil ways because they are sick of learning. An investigation of more than 1,000 middle school students showed that 46.5% of them were   47 
of learning because of examinations; 36.4% lacked persistence and 10.3% were sick of learning.
It is clear that   48  of cultivation of non-intelligence factors has been a main   49__        to intelligence development in teenagers. It even causes an imbalance between physiological  and   50  development among students.
If we don’t start now to   51  the cultivation of non-intelligence factors, it will not only block the development of   52  of teenagers, but also affect the quality of a whole generation. Some experts have put forward   53  about how to cultivate students’ non-intelligence factors.
Parents and teachers should   54  understand teenage psychology. On this basic, they can help them to pursue the objectives of learning,   55  their interests in their studies and toughening their willpower.  
36. A. expect        B. fail                  C. try                  D. manage
37. A. feelings      B. appearances       C. strength           D. nutrition
38. A. desired      B. discovered              C. disclosed          D. designed
39. A. Though        B. Unless              C. Whether         D. Since
40. A. make use of     B. get rid of    C. pay attention to  D. look forward to
41. A. moved       B. worried            C. frightened      D. excited
42. A. for          B. in                    C. into                 D. over
43. A. why               B. what               C. when            D. how
44. A. ever         B. even                C. still                 D. never
45. A. put          B. get                  C. make             D. give
46. A. shall         B. may              C. should D. must
47. A. afraid              B. aware            C. sceptical           D. supportive
48. A. lack         B. presence        C. increase        D. focus
49. A. storage     B. tendency          C. threat              D. barrier
50. A. intelligent   B. characteristic     C. psychological     D. physical
51. A. weaken     B. support            C. strengthen        D. oppose
52. A. performance B. diligence           C. maturity           D. intelligence
53. A. programs     B. warnings          C. proposals         D. decisions
54. A. fully           B. greatly           C. mainly             D. highly
55. A. ensuring       B. handling           C. widening          D. increasing

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


C
Will it matter if you don’t take your breakfast?A short time ago,a test was given in the United States.People of different ages from 12 to 83 were asked to have a test.During the test,these people were given all kinds of breakfasts,and sometimes they got no breakfast at all.Scientists wanted to see how well their body worked when they had eaten different kinds of breakfasts.
The results show that if he or she eats a right breakfast,he or she will work better than if he or she has no breakfast.If a student has fruit,eggs,bread and milk before going to school,he will learn more quickly and listen more carefully in class.
The result is opposite to what some people think.Having no breakfast will not help you lose weight.This is because people become so hungry at noon that they eat too much for lunch.They will gain weight instead of losing it.You will lose more weight if you reduce your other meals.
64.During the test,the people were given          .
A.no breakfast at all   B.very rich breakfast
C.different foods or sometimes none   D.little food for breakfast
65.The results show that          .
A.breakfast has little to do with a person’s work
B.breakfast has a great effect on work and studies
C.a person will work better if he only was fruit and milk
D.girl students should have less for breakfast
66.Which of the following is NOT true?
A.It is bad for your health to have no breakfast
B.Too little for breakfast and too much for lunch may make you fatter
C.If you don’t eat much for lunch and supper,you may lose weight
D.The more breakfast you have,the more quickly you’ll learn in class

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Two Earthquakes in Two Months:
Comparing the Quakes in Haiti (海地) and Chile (智利)
Overview (概要) How do the earthquakes in Chile and Haiti compare? Here, students perform a gallery walk to learn more about the earthquakes from a specific point, and then do a specific research and presentation project or response activity. Finally, they seek answers to their unanswered questions.
Materials Print copies of photographs, charts, documents and other visuals to display, as described below; computer (s) with Internet access (optional), research materials, handouts.
Warm-up Choose and prepare a “gallery” of photographs, graphics, news reports and other materials to display around the room to enable students to consider the 2010 earthquake in Chile.
Depending on course program, choose materials for the gallery that provide a window on the two quakes, through one of the following specific points, or the focus of your choice:
Earthquakes through History Putting the 2010 Chilean and Haitian quakes into historical view related to other earthquakes, including the 1960 Chilean quake and the 2004 Asian earthquake and tsunami.
Rescue and Aid Considering domestic and international response to the disasters by militaries, governments and aid organizations, including rescue and recovery as well as efforts to provide food, water, health care and shelter to those affected.
Related The article Underwater Plate Cuts 400 Mile Gash compares several earthquakes:
Mr. Lin figured that the quake on Saturday was 250 to 350 times more powerful than the Haitian quake.
But Paul Caruso noted that at least on land, the effects of the Chilean tremor (震動(dòng)) might not be as bad. For one thing, he said, the quality of building construction is generally better in Chile than in Haiti. And the fact that the quake occurred offshore should also help limit the destruction. In Haiti, the rupture (斷裂) occurred only a few miles from the capital, Port-au-Prince. The rupture on Saturday was centered about 60 miles from the nearest town, Chillan, and 70 miles from the country’s second-largest city, Concepción.
Read the article using the following questions.
Questions For discussion with others and reading comprehension:
How does the 2010 Chilean earthquake compare to the 1960 Chilean earthquake?
Why do scientists believe that the 2010 Chilean earthquake will not cause the same level of damage as January’s Haitian earthquake did?
How does the 2010 Chilean earthquake compare to the 2004 Indonesian earthquake?
What reasons do scientists give to explain why the Indonesian quake caused so much more damage than the recent Chilean earthquake?
64. Which of the following shows one of the reasons for slighter losses in Chile than in Haiti?
A. Position:
     
B. Power:

65. We can infer that the article Underwater Plate Cuts 400 Mile Gash includes ________.
A. the causes of the 2010 Chilean earthquake and the 1960 Chilean earthquake
B. the comparison between the 2010 Haitian and the 2004 Indonesian earthquakes
C. the reason for the 2010 Chilean quake being more powerful than January’s Haitian earthquake
D. the reason for less damage in the 2010 Chilean quake than in the 2004 Indonesian earthquake
66. What is the passage most likely to be?
A. A program for research.                                   B. A guide to earthquake study.
C. An advertisement for students.                             D. An introduction to quakes.

查看答案和解析>>

同步練習(xí)冊(cè)答案