“The world's oceans are slowly getting more acidic(酸的),” say scientists. The researchers from California report that the change is taking place in response to higher levels of carbon dioxide in the atmosphere.
The lowering of the waters' PH value is not great at the moment but could cause a serious threat to current ocean life if it continues, they warn. Ken Caldeira and Michael Wickett, from the Lawrence Livermore National Laboratory, report their concerns in the journal Nature. Increasing use of oil fuels means more carbon dioxide is going into the air, and most of it will eventually be absorbed by seawater. Once in the water, it reacts to form carbonic acid. Scientists believe that the oceans have already become slightly more acidic over the last century.
These researchers have tried to predict what will happen in the future by combining what we know about the history of the oceans with computer models of climate change. “This level of acidity will get much more extreme in the future if we continue releasing CO2 into the atmosphere,” said Dr Caldeira. And we predict the amount of future acidity will be greater than anything we have seen over the last several hundred million years.
However, it is not absolutely clear what that means for ocean life. Most organisms live near the surface, where the greatest PH change would be expected to occur, but deep－ocean life forms may be more sensitive to PH changes. Coral reefs and other organisms whose shells contain calcium carbonate(碳酸鈣) may be particularly affected if the water's acidity levels keep going up, the team predict. They could find it much more difficult to build these structures in water with a lower PH.
In recent years some people have suggested storing carbon dioxide from power station in the deep ocean as a way of dealing with global warming. But Dr Caldeira said that such a strategy should now be re—considered. “Previously, most experts had looked at ocean absorption of carbon dioxide as a good thing——because in releasing CO2 into the atmosphere we warm the planet, and when CO2 is absorbed by the ocean, it reduces the amount of greenhouse warming.”
67. The ocean is becoming more acidic due to___________.
A. the lower water PH value                              B. the warming atmosphere
C. the higher level of CO2 in the air                   D. the increasing use of oil fuels
68. According to Dr Caldeira, ___________.
A. ocean absorption of carbon dioxide is a good thing
B. more oil fuels will be used in the near future
C. scientists may predict climate changes with computer models
D. the future situation of the amount of acidity is extremely serious
69. If the water's acidity level keeps rising, ___________.
A. ocean life whose structures contain calcium carbonate may be affected
B. the water's PH value will become higher and higher
C. organisms living near the surface are more sensitive to PH changes
D. some disastrous events will occur more often than before
70. Most experts once believed storing carbon dioxide in the ocean would reduce___________.
A. the CO2 absorbed by the ocean               B. the amount of greenhouse warming
C. the acidity of the ocean                          D. the gradual release of CO2

小題1:C
小題2:D
小題3:A
小題4:B
         
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來源：不詳 題型：閱讀理解

Talking to Teachers—Teachers are just people．Behind that desk, is a living, breathing human being．And just like any human being, they will probably be friendly to people who talk nicely to them．Teachers also seem to get along better with children who take schoolwork seriously and are prepared for class．And, just like any other human being, teachers like to be appreciated．The next time your teacher helps you solve a math problem or figure out a science project, say thank you with a smile.
Talking to Parents—Parents can be very supportive if their children ask for help．If you think there’s something your parents can do to help you socialize more or feel more comfortable around people, then ask them．Very often, parents want very much to help, but really don’t know what to do．Pick a quiet time of the day and ask to talk．Tell them how you feel．Maybe they had the same trouble when they were kids.
This Stranger Thing—This is always a tough one．How do you deal with a neighbor, the mail carrier, or someone walking down your street—situations that often seem to cause arguments between kids and parents．The answer to these questions will vary from kid to kid, from parent to parent because all cultures are different．Some folks live in small towns where a hello to everyone is “what’s done”．Then there are kids who live in the city who may have been taught not to speak to anyone they don’t know．If you’re having trouble with this and always feel awkward in these kinds of situations, you might want to talk to your parents or a teacher about it．Where do they think you should draw the line? When is silence rude and when is it wise?
小題1:From the first paragraph we may learn that teachers dislike____ .
A．being talked to nicely
B．their students to be serious with the schoolwork
C．the students’ appreciation
D．the students who are not ready for classes
小題2:If your parents are not supportive and you are not getting along quite well with your parents, who or what is to blame?
A．Your parents.B．Yourself.
C．Lack of communication. D．Your teachers.
小題3:The underlined word in the third paragraph is close in meaning to____.
A．a(chǎn)fraidB．puzzledC．strangeD．familiar
小題4:The passage doesn’t say but it implies that in daily communication____.
A．a(chǎn)rguments often happen between kids and parents
B．we should talk to the neighbors and other people according to different cultures
C．city people and country people greet in the same way
D．we should fit our words with proper situations

查看答案和解析>>

科目：高中英語(yǔ) 來源：不詳 題型：完形填空


二、完形填空（30分）
Everybody knows Charlie Chaplin，a world-famous funny actor.People　21have laughed at Charlie Chaplin’s films　22　tears run down their faces.From his very first　23　they know what will happen. The little man is always with black moustache，wide-open eyes，round black hat and　___24　too large for his feet.He’ll?25　?through snow，and fall from windows.He’ll fight men who are twice his　26　,fall in love with women，who　27　notice him and try to hug（擁抱)them.
The poor man that Charlie Chaplin　28　in dozens of films makes all kinds of stupid mistakes.He is always in　29　,but he never　30　.He dreams of becoming a great man.Even people who　31　understand English can　32　Chaplin’s films，because they are mostly?　33___.It isn’t what he　34　that makes people laugh.His comedy（喜劇)doesn’t depend on words.It depends on little?　35　?which mean the　36　thing to people all over the world.
Chaplin raises his thick eyebrows or rolls his eyes.He hides behind a fat lady or under a table to escape from his　37　.He dresses well and pretends to be a　38　and important man. It is all so hopeless and　39　that he makes us laugh.This is the　40　of Chaplin’s huge success.
21.A.here                       B.everywhere?     C.abroad                         D.who?
22.A.if                     B.once?          C.because                         D.until?
23.A.disappearance        B.appearance?     C.words                           D.emotions?
24.A.trousers                B.stocks?         C.shoes                            D.hands?
25.A.sleep                    B.sit?            C.play                             D.struggle?
26.A.length                  B.size?           C.greatness                      D.width ?
27.A.hardly                  B.deeply?         C.widely                         D.luckily
28.A.played                  B.recognized?     C.loved                               D.fooled?
29.A.joy                       B.excitement?     C.sorrow                          D.trouble?
30.A.comes down          B.gets away?      C.goes back                        D.gives up?
31.A.don’t                    B.can?           C.do                                D.may?
32.A.understand            B.watch?         C.enjoy                                   D.see?
33.A.frightening           B.silent?          C.pleasant                       D.moving?
34.A.plays                    B.acts      ?    C.expects                         D.says?
35.A.actions                 B.expressions ?  C.stories                          D.words?
36.A.some                    B.different?    C.same                                D.bitter?
37.A.enimies                B.own?        C.characters                         D.films?
38.A.poor                     B.sad             C.rich                                 D.beautiful?
39.A.possible                B.impossible ?   C.instructive                        D.tired?
40.A.way                            B.beginning?   C.theory                              D.secret?

查看答案和解析>>

科目：高中英語(yǔ) 來源：不詳 題型：閱讀理解

Blogs are being used more and more by teachers. Many Internet services now offer free and easy ways to create personal Web pages.
Through comments on blogs, or Web logs, teachers can share their classroom experiences. They can exchange ideas and discuss successes and failures. They can debate educational policies. Or they can just sympathize with each other.
A teacher in the American state of North Carolina recently wrote on her blog: “Apparently the teachers at my school use too much paper. So my principal yelled at everyone at the last staff meeting for, like, ten minutes. Now, I’ve just been told, we are not getting anymore paper for the rest of the year.”
This unidentified blogger is now in her third year of teaching, but still calls her site firstyearteacher.blogspot.com.
A blogger who calls himself Minister Lawrence works as a substitute teacher. In April he wrote about a disputed plan to split the Omaha, Nebraska, public schools into separate systems for black, Latino and white students. Supporters say minority parents do not have enough power over their children’s education.
But Minister Lawrence wrote at teachersparadise.blogspot.com: “I’m afraid that what this says’ to a lot of people is that blacks, whites and Hispanics are not equal, and “reinforces” racist beliefs among people.”
Educators did not become involved with blogging right away. Many were concerned with privacy issues and security. But now, thousands of teacher blogs can be found on the Internet. Many teachers do not identify themselves, and they change the names of students and co-workers.
小題1:What are teachers not doing through blogs?
A．They discuss educational problem.B．They send money to the poor students.
C．They share teaching ideas.D．They comfort each other.
小題2: What is the main idea for the passage?
A．More and more teachers are using blogs.B．It is exciting to use blogs.
C．Blogs are popular with students.D．Educational problems are settled through blogs.
小題3: Why some teachers do not identify themselves? Because ___
A．they are forbidden to identify themselves.
B．they are forbidden to write something through blogs
C．they want to ensure their security
D．they want to amuse others.
小題4:Which of the following is the result of the teachers’ using blogs?
A．Paper consuming is declining.B．Teaching is improving.
C．Classes are more active.D．Government is against it.
小題5:Minister Lawrence’s blogs are about___
A．classroom experiencesB．teaching plans
C．educational policiesD．the black minority

查看答案和解析>>

科目：高中英語(yǔ) 來源：不詳 題型：閱讀理解


Students often want to practice their English outside class. One of the best ways to practice your English is to speak to a foreigner. You may ask, “Is it okay to try to talk to foreigners I see in the street?”
The answer is yes and no, but probably no! If you see a foreigner who looks lost, it is polite to ask him, “May I help you?” But, otherwise, you should probably let them get on with their business. Situations, however, do exist where it is quite all right to talk to foreigners. If a foreigner enters your school, classroom, office, shop or restaurant, for instance, feel free to ask him (for example):
— What is your name?
— Where do you come from?
— What do you think of Beijing?
— How long will you stay in Beijing?
There are also situations where it's okay to talk to foreigners in public places. If you see a foreigner alone in a restaurant, bar or coffee shop, it may be appropriate to ask him or her:
— Is this seat free?
— Do you mind if I talk to you in English?
You can probably help them if they are new in China and if they are alone, you may be able to make them feel more welcome.
After a few such questions, you should know whether this person wants to talk to you or not. If they ask you similar questions, or if they give long, informative answers, you're in luck. If not, then give them their privacy. Talking to strangers is fun if you choose the right time and place.
66. It is the best way to practice your spoken English with ______.
A. Japanese           B. Americans                C. our classmates           D. French people
67. From the second paragraph we can get to know that ______.
A. it is polite to stop a foreigner to talk with him in the street
B. it is polite to interrupt foreigners in a conversation
C. it is impolite to interrupt a foreigner when he or she is on business
D. it is impolite to help a foreigner find his way
68. When you first meet a foreigner, you should say “_______”
A. Where are you going?                           B. Have you ten your dinner?
C. Can you help me with my English?         D. Nice to meet you.
69. The writer suggests to us that we should ______.
A. follow the foreigners when we meet them in the street
B. talk with a foreigner in an accepted way
C. have a meal with foreigners in a restaurant
D. move to a place where a foreigner lives
70. This passage comes from a newspaper in column ________.
A. Sports               B. Health               C. Language                 D. Business

查看答案和解析>>

科目：高中英語(yǔ) 來源：不詳 題型：閱讀理解


         To be a good teacher, you need some of the gifts of a good actor; you must be able to hold the attention and interest of your audience; you must be a clear speaker, with a good, strong, pleasing voice which is fully under your control; and you must be able to act what you are teaching, in order to make its meaning clear.
Watch a good teacher, and you will see that he does not sit still before his class： he stands the whole time he is teaching; he walks about, using his arms, hands and fingers to help him in his explanations, and his face to express feelings. Listen to him, and you will hear the loudness, the quality (音色) and the musical note of his voice always changing according to what he is talking about.
The fact that a good teacher has some of the gifts of a good actor doesn’t mean that he will indeed be able to act well on the stage, for there are very important differences between the teacher’s work and the actor’s. The actor has to speak words which he has learnt by heart; he has to repeat exactly the same words each time he plays a certain part, even his movements and the ways in which he uses his voice are usually fixed beforehand (預(yù)先). What he has to do is to make all these carefully learnt words and actions seem natural on the stage.
A good teacher works in quite a different way. His audience takes an active part in his play: they ask and answer questions, they obey orders, and if they don’t understand something, they say so. The teacher therefore has to meet the needs of his audience, which is his class. He cannot learn his part by heart, but must invent it as he goes along.
I have known many teachers who were fine actors in class but were unable to take part in a stage-play because they could not keep strictly to what another had written.
51. What is the text about ?
A. How to become a good teacher.
B. What a good teacher should do outside the classroom.
C. What teachers and actors could learn from each other.
D. The similarities and differences between a teacher’s work and an actor’s.
52. The word “audience” in the fourth paragraph means ____ .
A. students                      B. people who watch a play
C. people who not on the stage     D. people who listen to something
53. A good teacher ____ .
A. knows how to hold the interest of his students
B. must have a good voice
C. knows how to act on the stage 
D. stands or sits still while teaching
54. In what way is a teacher’s work different from an actor’s ?
A. The teacher must learn everything by heart .
B. He knows how to control his voice better than an actor .
C. He has to deal with unexpected situations .
D. He has to use more facial expressions .
55. The main difference between students in class and a theatre audience is that ____.
A. students can move around in the classroom
B. students must keep silent while theatre audience needn’t
C. no memory work is needed for the students
D. the students must take part in their teachers’ plays

查看答案和解析>>

科目：高中英語(yǔ) 來源：不詳 題型：完形填空


第一節(jié)完形填空(共15小題；每小題2分．滿分30分)
閱讀下面短文，掌握其大意．然后從1—15各題所給的A、B、C和D項(xiàng)中，選出最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。
Teaching my first child, Danae, to share her toys was the biggest challenge. To    1    this, we started inviting other children to play, which could help Danae discover that it’s fun to share with others — a lesson I needed to   2      myself as well, as it   3     .
One evening Danae had   4       a friend, Natalie, to play with her. Their favorite was a children’s card game called Go Fish. That evening, after Natalie left, Danae came to me and said, “Mommy, I’d like to give these to Natalie tomorrow. They’re her favorites.”
She held up three cards from the Go Fish game. I tried to   5     that I didn’t want her to give them away because then our   6      wouldn’t be complete. “But I really want her to have them!” Danae    7    . I thought perhaps she didn’t understand that when she gave something away, it was gone   8     . So I tried again, saying, “Once you give the cards to her, you can’t   9      them back tomorrow.”
A look of   10     came over Danae’s face. For a moment I was happy that she seemed to   11     . But then she smiled and said. “Well, that’s okay; I want her to have them anyway.”
What could I say to that? I sat   12      for a moment and then I realized I had been trying for so long to ask her to share. Did it   13     that our Go Fish set would be   14    ? What mattered was that my daughter was learning the   15      of giving, that she was thinking about others instead of herself, and that she was trying to make her friends happy. Isn’t that what life is all about?
1．A．a(chǎn)chieve     B．a(chǎn)pply C．receive     D．get
2．A．design      B．know C．create       D．review
3．A．turned up  B．turned away     C．turned to   D．turned out
4．A．begged     B．encouraged      C．invited      D．found
5．A．explain     B．suggest     C．respond    D．teach
6．A．thing B．card  C．set     D．toy
7．A．insisted     B．recommended   C．a(chǎn)nnounced       D．cried
8．A．surely       B．suddenly   C．forever     D．indeed
9．A．a(chǎn)sk for     B．call for     C．look for    D．care of
10．A．surprise    B．concern    C．delight      D．satisfaction
11．A．understand       B．a(chǎn)ccept       C．refuse       D．doubt
12．A．sadly B．a(chǎn)ngrily     C．quietly      D．slowly
13．A．work B．mean C．remind     D．matter
14．A．incomplete       B．lost   C．limited     D．gone
15．A．content     B．usefulness C．way   D．joy

查看答案和解析>>

科目：高中英語(yǔ) 來源：不詳 題型：閱讀理解


第三部：閱讀理解 （共兩節(jié)，滿分40分）
第一節(jié)：閱讀短文（共15小題，每小題2分，滿分30分）
About 4 years ago, as a newly appointed general manager for a chemical plant near Toronto, I was faced with several leadership challenges. When I was first appointed as acting general manager, the plant was not even covering its costs and I was told that it would either be turned around or else!
I met with all employees and explained the severity(嚴(yán)峻)of the situation and that we would all need to do what we could to increse sales and improve performance or reduce operating expenses. They all appreciated my honesty although they were very nervous about their futures.
I then started working with each department head to determine how I could support their efforts. At first, they thought that I was looking to fix the blame for inefficiencies(無(wú)效率), but over time, they realized that I only wanted to help them find solutions.
They learned to trust me; as when things sometimes went poorly, I told my boss that I was the person in charge rather than pointing my finger at one of my members of staff. When we gained new busuness and it directly improved our bottom line, I praised the efforts of the entire team.
The plant workers became more and more motivated and now they all seem to really enjoy their jobs and I feel honored to be their leader. Do we still have challenges? Yes, but the strength of the team is such that we  all pull toghter to face them “as one”, kind of like a family facing life’s ups and downs.
56. When the author bacame the general manager, the plant _____.
A. could only make ends meet
B. had a strong management team
C. was really in bad situation
D. was planning to enter other fields
57. When the author came to the plant the firs time, he impressed the employees with his _____. 
A. practical attitude    B. Intelligence    C. diligence       D. politeness
58. Every time things didn’t go well, the author would _____.
A. take the blame himself
B. ask his staff to take responsibility
C. get very depressed
D. think of ways to increase sales.
59. The passage offers a good example of _____.
A. being a good employee
B. being a good leader
C. reducing operating expenses
D. The importance of honesty.

查看答案和解析>>

科目：高中英語(yǔ) 來源：不詳 題型：閱讀理解


第三部分：閱讀理解（共兩節(jié)，滿分40分）
第一節(jié)：選擇題（共15小題，每小題２分，共30分）
閱讀下列短文，從每題所給的A、B、C、D四個(gè)選項(xiàng)中，選出最佳答案，并在答題卡上將該項(xiàng)涂黑。
A month after Hurricane Katrina, I returned home in New Orleans．There lay my house, reduced to waist-high ruins, smelly and dirty．
Before the trip, I’d had my car fixed．When the office employee of the garage was writing up the bill, she noticed my Louisiana license plate．“You from New Orleans?” she asked．I said I was, “No charge,” she said, and firmly shook her head when I reached for my wallet．The next day I went for a haircut, and the same thing happened．
As my wife was studying in Florida, we decided to move there and tried to find a rental house that we could afford while also paying off a mortgage（抵押貸款）on our ruined house．We looked at many places, but none was satisfactory．We’d begun to accept that we’d have to live in extremely reduced circumstances for a while, when I got a very curious e-mail from a James Kennedy in California．He’d read some pieces I’d written about our sufferings for Slate, the online magazine, and wanted to give us (“no conditions attached”) a new house across the lake from New Orleans．
It sounded too good to be true, but I replied, thanking him for his exceptional generosity, that we had no plans to go back．Then a poet at the University of Florida offered to let his house to me while he went to England on his one-year paid leave．The rent was rather reasonable．I mentioned the poet’s offer to James Kennedy, and the next day he sent a check covering our entire rent for eight months．
Throughout this painful experience, the kindness of strangers has done much to bring back my faith in humanity．It’s almost worth losing your worldly possessions to be reminded that people are really nice when given half a chance．
56．What do we know about James Kennedy?
A．He was a writer of an online magazine．     
B．He was a poet at the University of Florida．
C．He offered the author a new house free of charge．    
D．He learned about the author’s sufferings via e-mail．
57．It can be inferred from the text that ______．
A．the author’s family was in financial difficulty
B．rents were comparatively reasonable despite the disaster
C．houses were difficult to find in the hurricane-stricken area
D．the mortgage on the ruined house was paid off by the bank
58．The author learned from his experience that ______．
A．worldly possessions can be given up when necessary
B．generosity should be encouraged in some cases
C．people benefit from their sad stories                                 
D．human beings are kind after all

查看答案和解析>>

同步練習(xí)冊(cè)答案