American beekeeping operations have been hit hard by what scientists call Colony Collapse Disorder. Almost half of their worker bees have disappeared during the past season. C.C.D. has also been reported in Israel, Europe and South America. Bees fly away from the hive and never return. Sometimes they are found dead; other times they are never found. Many crops and trees depend on pollination (授粉) by bees to help them grow.
A new report says virus may be at least partly responsible for the disorder in honey bee colonies in the United States. This virus is called Israeli Acute Paralysis Virus. It was first identified in Israel in 2004. Ian Lipkin at Columbia University in New York and a team reported the new findings in Science magazine. Doctor Lipkin says the virus may not be the only cause. He says it may work with other causes to produce the collapse disorder.
The team found the virus in colonies with the help of a map of honey bee genes that was published last year. They examined thirty colonies affected by the disorder. They found evidence of the virus in twenty – five of them, and in one healthy colony. The next step is further testing of healthy hives.
The researchers suggested that the United States may have imported the disorder in bees from Australia. They say the bees may carry the virus but not be affected.
The idea is that unlike many American bees, the ability of Australian bees to fight disease has not been hurt by the varroa mite. This insect attacks honey bees, which could make the disorder more likely to affect a hive. Australian bee producers reject these suspicions.
And some researchers suspect that bee production in the United States is down mainly because of the weather. Honey bees gather nectar(花蜜) from flowers and trees. The sweet liquid gives them food and material to make honey. But cold weather this spring in the Midwest reduced the flow of nectar in many flowers. Many bees may have starved. Dry weather in areas of the country could also be playing a part.
Wayne Esaias is a NASA space agency scientist who keeps bees in his free time. He lives in central Maryland, where he has found that flowers are blooming a month earlier than they did in 1970, which may be partly responsible for the disorder. Wayne Esaias is organizing a group of beekeepers to document nectar flow around the country.
小題1: What is the author’s attitude to the causes of the bee disorder?
A.criticalB.neutral
C.supportiveD.negative
小題2: What is the passage mainly about?
A.American beekeeping industry has been strongly influenced by the bee disorder.
B.Studies are being carried out on the causes of the bee disorder, but questions remain.
C.How the causes of the bee disorder in U.S have been found.
D.The bee production in U.S is down.
小題3: How many possibilities may be involved in the bee disorder according to the passage?
A.ThreeB.FourC.FiveD.Six
小題4:We can infer that         from the passage.
A.Israeli acute paralysis virus should be responsible for the disorder.
B.The solution to the disorder will be found eventually.
C.American bees are more likely to defend themselves against hurt from other insects than Australian ones.
D.Many crop and plant production in U.S may be influenced by the bee disorder.
小題1:B小題1:B小題1:A小題1:D
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

In order to be a success in the American business world, you must “get along” with people. You must learn to conduct yourself in such a way _16_ you earn the affection and respect of others._17_ we have already pointed out, Americans_18_ business and pleasure. Therefore, learning how to _19_ informally can be a help with your American business _20_. Americans like to talk about a _21_of different topics—sports, politics, cars, popular movies and television shows and personal interests. Many large American cities have sports teams. If you are _22_ with Americans in the United States, it would be a good idea to _23_out about the local sports teams so that you can _24_ in the almost inevitable discussions about “how our _25_ will do this year”. Politics can be a _26_ topic unless everyone is of the same mind _27_. Limit your discussions to asking questions of your friends. Most Americans are _28_ owners and some are even fond of the subject. You can contribute _29_talking about cars you have owned or by _30_ information you have read in automotive magazines. Americans watch television almost every night and attend movies regularly,
_31_ naturally television shows and the _32_ movies become topics for discussions. If you are unable to _33_ American television or attend American movies, reading the _34_ section of such magazines as Time News week will keep you up to date on _35_is popular in America.
小題1:
A.whichB.whereC.a(chǎn)sD.that
小題2:
A.WhileB.SinceC.AsD.Because
小題3:
A.mixB.enjoyC.likeD.manage
小題4:
A.conductB.a(chǎn)ppearC.behaveD.chat
小題5:
A.friendsB.effortsC.contactsD.companies
小題6:
A.bitB.totalC.groupD.number
小題7:
A.meetingB.workingC.living `D.playing
小題8:
A.findB.learnC.goD.stay
小題9:
A.workB.participateC.succeedD.break
小題10:
A.groupB.businessC.companyD.team
小題11: A. common    B. sensitive            C. special.    D daily
小題12:
A.politicallyB.economicallyC.professionallyD.personally
小題13:
A.houseB.carC.businessD.land
小題14:
A.toB.towardC.byD.through
小題15:
A.collectingB.sharingC.gatheringD.a(chǎn)nalyzing
小題16:
A.soB.thereforeC.thusD.hence
小題17:
A.interestingB.excitingC.excellentD.latest
小題18:
A.witnessB.lookC.watchD.glance
小題19:
A.entertainmentB.sportsC.businessD.movie
小題20:
A.whichB.thatC.whatD.a(chǎn)s

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

“If you want to see a thing well, reach out and touch it!”  That may seem a strange thing to say. But touching things can help you to see them better. Your eyes can tell you that a glass ball is round. But by holding it in your hands, you can feel how smooth and cool the ball is. You can feel how heavy the glass is. When you feel all these about the ball, you really see it. With your skin, you can feel better. For example, your fingers can tell the difference between two coins in your pocket. You can feel a little drop of water on the back of your hand, too.
All children soon learn what “Don’t touch!” means. They hear it often. Yet most of us keep on touching things as we grow up. In shops, we touch things as we might buy: food, clothes. To see something well, we have to touch it.
There are ways of learning to see well by feeling. One way is to close your eyes and try to feel everything that is touching your skin. Feel the shoes on your feet, the clothes on your body, the air on your skin. At first, it is not easy to feel these things. You are too used to them!
Most museums are just for looking. But today some museums have some things to touch. There you can feel everything on show. If we want to see better, reach out and touch. Then you will really see.
小題1: By touching things,________.
A.you will have a strange feeling
B.you will learn how to reach out your hand
C.you can tell the difference of the things
D.you can tell what colors they are
小題2: When people buy things in shops, they often_________.
A.try them on firstB.keep their right hands on them
C.a(chǎn)sk about themD.feel and touch them
小題3:Why does it say “At first, it is not easy to feel these things?” Because__________.
A.the things are used by people, tooB.people feel the things too often
C.people know how to use the thingsD.the things are hard to feel
小題4:Which of the following can be the best title of the story?
A.Touching by FeelingB.To See or to Feel?
C.To See Better---FeelD.Ways of Feeling

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

The first and best of victories is for a man to conquer himself; to be conquered by himself is, of all things, the most shameful, says Plato. Self-control is at the root of all the advantages. Let a man give in to his impulses (沖動) and feelings, and from that moment he gives up his moral freedom.
A single angry word has lost many a friend. When Socrates found in himself any temper or anger, he would check it by speaking low in order to control himself. If you are conscious of being angry, keep your mouth shut so that you can hold back rising anger. Many a person has dropped dead in great anger. Fits of anger bring fits of disease. Whom the gods would destroy they first make mad. Keep cool, says George Herbert, for fierceness (狂怒) makes error a fault.
To be angry with a weak man is to prove that you are not strong yourself. Anger, says Pythagoras, brings with folly(愚蠢) and ends with regret. You must measure the strength of a man by the power of the feelings he conquers, not by the power of those which conquer him.
Self-control is man’s last greatest victory.
If a man lacks self-control he seems to lack everything. Without it he can have no patience, no power to govern himself; he can have no self-confidence, for he will always be controlled by his strongest feeling. If he lacks self-control, the very backbone and nerve of character are lacking also.
小題1: What does the reader learn from the first paragraph?
A.The greatest victory for a man is to conquer everything except himself.
B.One’s moral freedom is based on the control of himself.
C.To control oneself is the most difficult in one’s life.
D.If a person is too stubborn, he will feel most shameful.
小題2: What is the correct interpretation of “Whom the gods would destroy they first make mad ”in paragraph 2 ?
A.If the gods want to kill you, they make you crazy first.
B.If you always lose your temper, you will soon be finished.
C.If you cannot control yourself, you will become crazy.
D.If you are mad, you will be punished by the gods.
小題3: If a man lacks self-control, he lacks all of the following EXCEPT _______.
A.the very backbone and nerve of character
B.the patience and power to control himself
C.strong feelings
D.self-confidence
小題4: The author’s main purpose in writing this article is to _______.
A.explain that self-control is the key to success
B.teach people how to control everything in order to make a great success
C.distinguish all kinds of self-control and suggest ways for keeping it
D.a(chǎn)dvise people not to lose temper so as to make and keep more friends
小題5: The passage is mainly developed by _____.
A.a(chǎn)nalyzing causesB.making comparisons
C.examining differencesD.listing quotations

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

No one knows yet the accurate number of lives which have been lost in this terrible fire. But reports suggest that it is more than one hundred.
A wall of fire fifty feet high and at least one hundred and fifty miles wide is now racing towards the forests and rich farmlands of southern Victoria. Towns less than one hundred miles from Melbourne will be in danger unless the wind changes. People are rushing excitedly into the streets. The police have warned them not to see the fire but many people are doing so.
The cause of the fire is unknown. No rain has fallen in this part of Australia for three months, and the hot, north-west wind from the great central desert is blowing at more than thirty miles an hour.
The firefighters are traveling to the fire by road, rail and air. But it is not easy to get there. Flames and fallen trees have cut off or blocked roads and railway lines. The thick smoke often prevents them from finding the air strips (飛機跑道).
It is said that the fire has brought the greater danger to the country since the Second World War.
小題1:By the time the article is written, the fire       .
A.has just broken out B.has been put out
C.is spreading fiercelyD.is coming to an end
小題2:The writer writes this article mainly to tell people       .
A.the fire is terrible and dangerous
B.it is very easy to put out the fire
C.less than one hundred people die of the fire
D.to join in the fight against the fire
小題3:In the 4th paragraph, the writer suggests (暗示) that       .
A.the fire would be controlled by the firefighters very soon
B.it will be very difficult to put out the fire
C.the government is paying great attention to the fire
D.the fire has caused great losses and the airport was in danger
小題4:The underlined word “ accurate ” in the first sentence has the same meaning as        .
A.recent B.false C.rough(大約的)D.exact

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

The Harvard Student—led Walking Tour
Let a student show you Harvard···on a free walking tour.
We welcome our neighbours to stop by the Harvard University Events&Information Centre,
located in the Holyoke Centre Arcade at 1350 Massachusetts Avenue in the heart of Harvard Square in Cambridge.
Let a student take you and your family, school,or organization on an engaging,hour-long free historical tour of the Harvard Campus. The tours leave from the Events&Information Centre.Not only will you discover the location of fascinating exhibition and programmers on campus,you will also see Harvard’s rich sampling of American history and architecture from the Colonial period to the present.
Schedule of Tours
Tours leave the Events&Information Centre at 10 a.m. and 2 p.m. Monday through Friday, and at 2 p.m. on Saturday through the academic year (February4 through May 2;September 23 through December 16).Summer tours(June 24 through August 15)are offered at 10 a.m.,11:15 a. m.,2p.m.,and 3:15 p.m. Monday through Saturday.Reser—vacations for special tours of 20 or more people may be made by calling the Events&Information Centre at (617)495-1573 or emailing icenter@ camail Harvard, edu. Tours are suspended March23 through April2 for Spring Break.May3 through June23 for Spring intercession(禱告),and August16 through September 22 for Summer intercession.
NOTE:Prospective(未來的)students may take tours originating at the Harvard Admission Office, located at Byerly Hall on 8 Garden Street in Cambridge.From April through August,the Admissions staff conducts an information session at l0a.m. followed by an 11 a.m. tour.Monday through Friday On Saturdays.there is no information session but the 11 a.m.tour is still scheduled.Another session is held year-round at 2 p.m. with a 3 p.m. tour following. For more information on tours for prospective students,please call at(617)495-1551.
Harvard University Events&Information Centre
Location:Holyoke Centre Arcade.1350 Massachusetts Avenue,Cambridge MA 02138
Phone:(617)495-1573
小題1:A person can join in a tour at ________on Saturday through the academic year.
A.10 a.m.B.2 p.m.C.11:15 a.m.D.3:15 p.m.
小題2:If you want to go for an information session, you can go on __________.
A.May 2B.June 23C.August 20D.September 1
小題3:A student who wants an information session may _________for more information.
A.call (617)495-1573B.call (617)495-1551
C.email icenter@ camail. Harvard.edu.D.go to the Events&Information Centre
小題4:The above ad.is mainly intended for________.
A.foreign visitorsB.freshmen
C.high school studentsD.those living near Harvard University

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

For the person keeping a journal, whatever he experiences and wants to hold he can write down. But to get it down on paper begins another adventure. For he has to focus on what he has experienced, and to be able to say what, in fact, the experience is. What of it is new? What of it is remarkable because of associations in the memory it stirs up? It is a good or bad thing to have happened? And why, specifically? The questions multiply  (增多) themselves quickly. As one tries to find the words that best represent this discovery, the experience becomes even clearer in its shape and meaning.
Beyond the value of the journal as record, there is the value of the discipline it teaches. The journalist begins to pay closer attention to what happened to and around himself. He develops and sharpens his skills of observation. He learns the usefulness of languages as a means of representing what he sees, and gains skill and certainty in the expression of his experiences. To have given up one’s experience to words is to have begun marking out the limits and potential of its meaning. In the journal that meaning is developed and clarified (澄清、闡明) to oneself. When the intention of the development of that meaning is the consideration of another reader, the method of the journal redirects itself and it becomes the essay.
小題1:According to the author, keeping a journal is good for ________.
A.observation and expression
B.certainty and discipline
C.experience and adventure
D.consideration and development
小題2:By keeping a journal, one can ________.
A.develop the usefulness of language
B.develop his memory
C.clarify the consideration to everyone
D.have a thorough understanding of his experience
小題3:Which of the following statements is NOT correct?
A.The journalist can express what has happened.
B.A journal can serve as a record of the past happening.
C.The journalist must be able to observe closely.
D.Writing helps develop the consideration of others.
小題4:The passage is mainly about ________.
A.how to write a journal
B.the expressions of a journal
C.the values of keeping a journal
D.how to solve the problems in a journal

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Matt grows the best vegetables in the village. He grows fruit too – big, sweet apples and oranges. And what else? Well, the biggest and the prettiest flowers.
Things grow in Matt’s garden all through the year. He cuts some flowers for his sitting room table; and of course , he eats some fruit and vegetables. But he sells everything else in the market. Matt is not a poor man.
He knows a few other gardens; but he does not have any friends. You might ask, “What is that?” Why doesn’t he have friends. I will tell you. People do not understand him. And they do not understand his garden. “Why not?” You will ask. “It is a very good garden, isn’t it?” It is a wonderful garden. Matt plants things in spring, summer, autumn and winter. After that he does very little work. He sits in the garden with his small radio. And everything grows.
People ask, “How does Matt grow these wonderful things? He waters the plants sometimes, but he doesn’t do anything else. He just sits under an orange tree with his radio. He listens to music nearly all day!” and that is all quite true. People cannot understand it, and so they don’t like it very much.
Matt likes music. But what about the garden? Who does the work? I will tell you another true thing: the music does the work. All plants love music; and Matt knows that.
Do you want big vegetables and the loveliest flowers? Well, just give your plants a lot of music.
小題1:There are not only vegetables and flowers, but also ________ in Matt’s garden.
A.plantsB.fruit treesC.a(chǎn)ntsD.crops
小題2:Matt makes a living by ___________
A.selling his vegetables, fruit and flowersB.growing trees in his garden
C.working in the marketD.helping other people growing plants
小題3: Everything in Matt’s garden grows well because  ______
A.he has a good garden
B.he is good at growing things and likes listening to the radio
C.music helps his plants a lot
D.he is very hardworking
小題4:People don’t like Matt because ____________
A.he doesn’t give them any vegetables or fruitB.he listens to the radio too much
C.they don’t understand himD.Matt doesn’t let them listen to his radio

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Swimming is one of those activities that can be learned early in life. Little children can learn to swim as soon as they walk. In fact, you need the same skills in walking as in swimming. However, I believe that five is the best age to learn. By five or six, a child knows fear of water, a very important thing to know. It's wise to be afraid, to recognize true danger. Young ones understand that the water can sometimes be very dangerous.
To really benefit from swimming, every swimmer should learn, as soon as possible, these four basic strokes; butterfly, backstroke, Breaststroke, and crawl. I feel that one of these-the breaststroke-is different from the others, since some young swimmers use this stroke naturally, without any training.
In swimming there are certain rules every swimmer should follow:
1). Never swim alone! No matter how good you are in the water, don’t risk drowning by swimming alone. If you swim by yourself, with no life guards or friends with you, you may get into trouble.
2). Don't go beyond your abilities. Most swimmers know enough not to swim too far from the bank or the beach, Showing off by doing dangerous tricks is no good. Swim safely and you will continue to swim and alive.
3). Don't smoke. Swimming depends on a healthy body; good lungs are part of it.
4). Work at any activity that builds muscles.
小題1: Little children can learn to swim as soon as _____.
A.they can talk
B.they start walking
C.they have no fear of the water
D.they are five or six years old
小題2:The author believes that fear of water is_____.
A.stupidB.sensibleC.dangerousD.not smart
小題3: The stroke that some young swimmers use first is_____.
A.butterflyB.backstrokeC.breaststrokeD.crawl
小題4:According to the passage, you should not swim alone because_____.
A.the water is too cold
B.your parents would not be happy
C.something in the water might attack
D.you might drown

查看答案和解析>>

同步練習(xí)冊答案