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    The e conducted by Benjamin Franklin was successful. 【查看更多】

     

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    　　Plants can't communicate by moving or making sounds, as most animals do．Instead, plants produce volatile compounds(挥发性化合物)——chemicals that easily change from a liquid to a gas．A flower's sweet smell, for example, comes from such volatile compounds to attract insects such as bugs and bees．

    　　Plants can also discover volatile compounds produced by other plants．A tree under attack by hungry insets, for instance, may give off these chemicals in order to let other trees know about the attack．In response, the other trees may send off their chemicals to keep the bugs away——or even chemicals that will attract the bugs’ natural enemies．

    　　Now scientists have created a quick way to understand what plants are saying： a chemical sensor(传感器)called an “electronic nose”．The “e-nose” can tell such compounds as plants make．When plants are attacked, scientists say, the e-nose could help quickly decide whether plants are being eaten by insects．But today, the only way to spot such insects is to inspect individual plants by observing them．This is a challenging task for managers of greenhouses, including those that can house thousands of plants．The research team is working with an e-nose that can recognize volatile compounds．Inside the device, 13 sensors chemically react with volatile compounds based on the interactions(相互作用), and then the e-nose will give off electronic signals that the scientists can analyze by using computer software．

    　　To test the e-nose, the team presented it with healthy leaves from cucumber, pepper and tomato plants, all being common greenhouse crops．Then scientists collected samples of the air around damaged leaves from each type of crop．These plants had been damaged either by insects or by scientists who made holes in the leaves with a hole punch(打孔器)．

    　　The e-nose, it turns out, can identify healthy cucumber, pepper and tomato plants based on the volatile compounds they produce．It could also identify tomato leaves that had been damaged．But even more impressive, the device could tell which type of damage——by insects or with a hole punch——had been done to the tomato leaves．

    　　With some fine-tuning(微调), a device like the e-nose can one day be used in greenhouses to quickly spot harmful bugs, the researchers say．A device like this can also be used to identify fruits that are perfectly ripe and ready to pick and eat, says Natalia Dudareva, a biochemist at Purdue University in West Lafayette, India, who studies smells of flowers and plants．Hopefully, scientists believe, the device can bring large benefits to greenhouse managers in the near future．

    (1)

    We learn from the text that plants communicate with each other by ________．

    [　　]

    A．

    making some sounds

    B．

    waving their leaves

    C．

    producing some chemicals

    D．

    sending out electronic signals

    (2)

    What did the scientists do to find out if the e-nose worked?

    [　　]

    A．

    They fixed 13 sensors inside the device．

    B．

    They presented it with all common crops．

    C．

    They collected different damaged leaves．

    D．

    They do tests on damaged and healthy leaves．

    (3)

    According to the writer, the most amazing thing about the e-nose is that it can ________．

    [　　]

    A．

    pick out ripe fruits quite expertly

    B．

    spot the insects in a very quick way

    C．

    tell different damages to leaves

    D．

    recognize unhealthy tomato leaves

    (4)

    We can infer from the last paragraph that the e-nose ________．

    [　　]

    A．

    is unable to tell the smell of flowers

    B．

    is not yet tested in greenhouses

    C．

    is designed by scientists at Purdue

    D．

    is helpful in killing harmful insects

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    阅读下面短文，根据上下文填入适当的词语，或使用括号中词语的适当形式，并将答案填写在1～10的相应位置。

    　　Electronic mail(e-mail)　　1　　(start)in the late 1960s by the U．S．military．By the 1980s, academics in a number of fields were using e-mail for professional collaboration．The early 1990s 　　2　　(see)an explosion of the use of e-mail and other computer networking tools for a wide range of professional, academic, and personal purposes．

    　　E-mail is a way of 　　3　　(send)a message from one computer to one or more other computers around the world．First, you 　　4　　(短语动词)the e-mail address of the person you are sending the message to．Then you write the message, or 　　5　　(direct)in a special e-mail software program or first in a word-processing program and transfer it into the e-mail software．You should push a button 　　6　　(give)a simple command to send the message．The computer system you are connected to will break the message up into tiny pieces and send them 　　7　　(electronic)to the destination．The pieces might travel numerous routes through other computers on the way．Usually within 2～3 minutes, the pieces will all arrive at their destination, where the 　　8　　(receive)computer will reassemble them into a message．The person 　　9　　(receive)the message can check his or her mailbox at a 　　10　　(convenience)time and read the mail．

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    仔细阅读下面的短文，短文中有10个空格或画线句子。请按照每小题括号内的具体要求完成语法填空、词形变化、句子合并、句子改写以及病句改正等。

    　　Electronic mail(e-mail)　　1　　(start)in the late 1960s by the U．S．military．By the 1980s, academics in a number of fields were using e-mail for professional collaboration．The early 1990s 　　2　　(see)an explosion of the use of e-mail and other computer networking tools for a wide range of professional, academic, and personal purposes．

    　　E-mail is a way of 　　3　　(send)a message from one computer to one or more other computers around the world．First, you 　　4　　(短语动词)the e-mail address of the person you are sending the message to．Then you write the message, or 　　5　　(direct)in a special e-mail software program or first in a word processing program and transfer it into the e-mail software．You should push a button 　　6　　 a simple command to send the message．The computer system you are connected to will break the message up into tiny pieces and send them 　　7　　(electronic)to the destination．The pieces might travel numerous routes through other computers on the way．Usually within 2-3-minutes, the pieces will all arrive at their destination, where the 　　8　　(receive)computer will reassemble them into a message．The person 　　9　　 the message can check his or her mailbox at a 　　10　　(convenience)time and read the mail．

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    完形填空（共20小题；每小题1分，满分20分）
    阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C、D）中，选出最佳选项。
    On August 26, 1999, New York City experienced a terrible rainstorm. The rain caused the streets to _36_ and the subway system (地铁系统)almost came to a stop.
    Unfortunately, this happened during the morning rush hour. Many people who were going to work were _ _37__ to go home. Some battled to _ _38__ a taxi or to get on a bus. Still others faced the _ _39_ bravely, walking miles to get to work..
    I _ _40__ to be one of the people on the way to work that morning. I went from subway line to subway line only to find that most _ _41_ had stopped. After making my way _ _42  crowds of people, I finally found a subway line that was operating . __ 43_, there were so many people waiting to 44_ the subway that I could not even get down the stairs to the platform.(月台) So I took the train going in the _ _45 direction, and then turn back to the downtown train. Finally, after what seemed like an forever journey, the train _46_ my stop. Then I had to walk several blocks in the increasingly heavy rain. When I finally got to my office, I was _47__ through, discouraged and _48___.
    My co-workers and I spent most of the day drying off. When it was 5:00 pm，I was ready to go home. I was about to turn off my computer __49___ I received an email from Garth, my Director:
    I would like to thank all of you who made the effort and __50__ reported to work. It is always reassuring(令人欣慰), at times like these, when employees so clearly __51___ their devotion(（忠心）  to their jobs. Thank you.
    Garth’s email was short, but I learned more from that __52__ message than I ever did from a textbook. The e-mail taught me that a few words of __53____ can make a big difference. The rainstorm and the traffic __54__ had made me tired and upset. But Garth’s words immediately_55__ me and put a smile back on my face.
    36. A. break            B. flood              C. sink                  D. run
    37. A. forced           B. refused              C. ordered             D. gathered
    38. A. order            B. pay                   C. call                   D. search
    39. A. climate        　 B. weather             C. storm                D. snow
    40. A. used              B. promised           C. seemed             D. happened
    41. A. practice          B. traffic               C. process             D. service
    42. A. to               　B. through             C. over                  D. for
    43. A. Unfortunately      B. Luckily      C. Interestingly      D. Satisfyingly
    44. A. check              B. carry          C. find             D. board
    45. A. only              B. similar         C. same             D. opposite
    46. A. paused            B. crossed         C. reached          D. parked
    47. A. wet                B. weak       C. sick             D. hurt
    48. A. interested        B. tired          C. surprised       D. puzzled
    49. A. while             B. when          C. where          D. after
    50. A. hardly            B. happily        C. firstly         D. finally
    51. A. show              B. carry          C. take          D. fetch
    52. A. basic           B. attractive       C. brief               D. original
    53. A. promise          B. appreciation       C. advice             D. position
    54. A. troubles         B. signals       C. rules         D. signs
    55. A. corrected         B. supported          C. surprised           D. delighted

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    Who Is Kimberly Kirberger? Kimberly Kirberger is the president and founder of Inspiration and Motivation for Teens, Inc．(I．A．M．for Teens, Inc．) a corporation formed exclusively (专有地) to work for teens．It is her goal to see teens represented in a more positive light and it is her strong belief that teens deserve better and more positive treatment．

    She spends her time reading the thousands of letters and stories sent to her by teen readers and traveling around the country speaking to high school students and parents of teens．She has appeared as a teen expert on many television and radio shows．

    Kimberly says that the College Soul book has been an amazing journey．In getting close to and heating from so many teenagers she kept hearing about this very emotionally packed time that begins with application to college and extends through the four-year experience．It became clear to her that this was a time of life that was filled with many challenges and that college students could really benefit from a book like this．For her, it was simply a continuation of a commitment that she has made to teenagers to do what she can to inspire and motivate them while letting them know there are people who believe in them．

    Kimberly is the co-author of the bestseller, Chicken Soup for the Teenage Soul and the New York Times bestseller, Chicken Soup for the Teenage Soul II, as well as Chicken Soup for the Teenage Soul Journal．She is also the co-author of the forthcoming Chicken Soup for the Parent’s Soul and Chicken Soup for the Teenage Soul III, and the author of Teen Love: On Relationships, a Book for Teenagers．

    Kimberly started the Teen Letter Project with Jack Canfield, Mark Victor Hansen and Health Communications, InC．The Project is responsible for answering the heartfelt letters received from teenagers and also reaching out to teens in trouble and encouraging them to seek professional help．

    To book Kimberly for a speaking engagement or for further information on any of her projects, please contact:

    I．A．M．for Teens, Inc．

    P．O．Box 936, Palisades, CA 90272 phone: 310-573-3655

    fax:．310-573-3657

    e-mail for stories: stories @ teenagechickensoul.com

    e-mail for letters: letters @ teenagechick

    Web site: www.Teenagechickensoul.com

    68．Kimberly Kirberger devotes herself to ________．

    A．helping people in trouble　　 B．writing books for children

    C．the research of teen problems　　  D．the healthy growth of teenagers

    69．The third paragraph mainly tells us ________．

    A．why Kimberly wrote the College Soul book

    B．how Kimberly wrote the College Soul book

    C．the College Soul book was a great success

    D．college students benefit from the College Soul book

    70．Which of the following was written alone by Kimberly Kirberger ?

    A．Chicken Soup for the Teenage Soul．

    B．Chicken Soup for the Parent’s Soul．

    C．Teen Love: On Relationship, a Book for Teenagers．

    D．Chicken Soup for the Woman’s Soul．

    71．What’s the purpose of the Teen Letter Project?

    A．Helping problem teenagers．  B．Collecting teenager problems．

    C．Attracting the teenagers．      D．Offering help to teenagers．

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