However, bats are not affected by free radicals produced during flight. The reason is that bats carry special genes to repair any damaged DNA.
Scientists think that because bats fly and produce free radicals, they’ve evolved to carry genes that shaped their special immune system.
“We’re thinking that the evolution of flight led to a sort of effect, influencing not only the immune system but also things like aging and cancer,” says Chris Cowled, of the Australian Animal Health Laboratory. “We think we’ve really found something special.”
Researchers believe that this discovery might one day be key to helping humans fight diseases such as cancer that attack the immune system and damage DNA. 44. What’s true about bats according to the passage?
A. They carry many deadly diseases like SARS so it’s easy for them to get sick. B. Bats are the only animals that can tell directions easily. C. Bats are among the mammals that can truly fly. D. Researchers studied bats to help save people.
45. According to researchers, bats can fight off many deadly diseases mainly because ________. A. they have developed special immune system through evolution B. they are able to fly, which burns a lot of energy
C. free radicals in their bodies can damage DNA and cause diseases D. they carry no special genes to repair damaged DNA 46. The passage is mainly about ________. A. bats and dangerous diseases
B. bats and their special immune system D. ways to cure cancer
C
It is a novel that is probably more talked about than read. People think: “It’s such a big book! It has such a serious theme!” The feeling that they are going to be taught a long, hard lesson often puts readers off. But really, War and Peace (1869), which tells the stories of five upper-class families in Russia at the time of the 1812 French invasion, is not to be missed. Reading this novel is one of those once-in-a-lifetime experiences, like climbing the Great Wall: You will regret it if you do not try.
Earlier this month, USA Today reported that a six-episode (集) War and Peace miniseries (连
C. free radicals and immune system
续短剧) produced by the BBC would air next year.
With a complex plot and so many characters, readers unfamiliar with the work might be most interested in the characters from the financially-troubled Rostov family of Moscow. Count Rostov has four teenage children. Natasha is in love with Boris Drubetskoy, who is about to become an army officer. Nikolai Ilyich loves the poor Sonya, a ward (女仆) of the family, but his family is not happy with their relationship. The proud Vera is about to start a happy marriage with a German-Russian officer. The youngest Rostov is the 9-year-old Petya, who, like his brother Nikolai, has his heart set on fighting for his country.
The lives of all are about to be changed by the upcoming great war that involves many other major characters of War and Peace, such as Prince Andrei, who goes into a military career partly in order to get away from his unhappy marriage to the socialite (社会名流) Lise.
The novel has a great reputation among many kinds of writers and millions of readers. US writer Ernest Hemingway wrote: “I don’t know anybody who could write about war better than Tolstoy did.” A comment by the great 20th-century Russian short-story writer Isaak Babel shows the rich sense of history that Tolstoy’s work conveys. “If the world itself could write, it would write like Tolstoy,” Babel commented.
47. Why do people prefer to talk about the novel rather than read it? A. The story is directly related to their daily life. B. The story is too long and has too serious a theme. C. They often get confused with the complex relationship. D. They can understand the story through shared ideas. 48. What is the author’s purpose in writing the passage? A. To tell readers different opinions on the book. B. To make it easier for readers to read the book. C. To sing high praise for the great writer Tolstoy. D. To advise readers not to miss such a good book. 49. What can we know from Isaak Babel’s comment? A. The novel has a great distinction in the world. B. The book helps readers make sense of history. C. Many other writers regard Tolstoy as their idol.
D. Readers should follow Tolstoy’s writing style.
D
A microscope is a useful instrument for observing small objects. By producing a bigger image, the microscope reveals details that are undetectable to the naked eye(裸眼).
Before using the microscope, please read the instructions below.
CAUTION: Microscopes are both delicate and expensive and must be handled with care. 1. Always carry the microscope with two hands — one supporting the base and the other on the arm.
2. Avoid stretching the wire of the lamp across a walkway.
3. Keep the stage clean and always use a glass slide for specimens(样本).
4. To avoid crushing the glass slide when focusing, begin with the lens close to the specimen and gradually back off to focus.
5. Keep the microscope covered to prevent the dust while it is being stored. HOW TO USE THE MICROSCOPE: 1. Plug(接通电源) in the lamp.
2. Place a sample of what you wish to observe on a slide.
3. Adjust the mirror so it reflects light from the room up into the objective lens. When the mirror is correctly adjusted, a complete circle of light will appear when you look through the eyepiece. 4. Place your slide with the specimen directly over the center of the glass circle on the stage. If it is a wet slide, be sure the bottom of the slide is dry.
5. With the LOW POWER objective lens placed over the slide, use the coarse focus knob to lower the lens to the lowest point.
6. Look through the eyepiece with one eye while closing the other eye. Slowly raise the lens until the focus is relatively clear.
7. Use the fine focus knob to fine -tune(微调)the focus.
8. Without changing the focus knobs, switch to the HIGH POWER objective lens. Once you have switched to HIGH POWER, use only the fine focus knob to make the image sharper. 50. Which of the following is the correct way to use a microscope according to the text? A. Use one hand to carry the microscope B. Place a sample directly on the clean stage C. When stored, the microscope should be adjusted. D. Look through the eyepiece with one eye.
51. If you want to observe a thin piece of hair, which of the following should you do first? A. Switch to objective lens B. Adjust the mirror
C. Look through the eye D. Place the hair on a glass slide 52. According to the text, you could see a complete circle of light _____. A. after correctly adjusting the mirror B. while looking at the specimen on a glass slide C. after slowly raising the objective lens D. before positioning the mirror correctly 第二节 信息匹配
美国长大的台湾人气歌手Wang Lee Hom在接受CNN Talk Asia栏目专访时，回答了主持人Lorraine Hahn提出的五个问题（第61—65题）。请从下列提问（A、 B、C、D、E和F）中选出与他的回答相匹配的问题，并在答题纸上将相应选项的标号涂黑,如选E请涂A和B,选F请涂C和D。选项中有一项是多余选项。 A.What do awards mean to you? B.How would you describe your style? C.What is it about acting that’s so attractive? D.How do you deal with this loss of privacy(隐私)? E.How do you divide your time in acting and music? F.What gave you the idea to start the studios in the first place?
Born in New York in 1976, Wang grew up in the United States. Blessed with a mix of brains and
talent, he spent his youth performing in local musicals. While in university, Wang landed a recording contract in Taiwan. His breakthrough album firmly established him as a rising star in the Asian music scene. In addition to writing and producing his own music, Wang has also taken part in movie projects around Asia. He has won a great popularity, and now he is having an interview with CNN Talk Asia. 53. ___________________
WL: It is hip hop, which is the way I like to think of it. It combines Chinese elements(元素) and sounds. I started it off in my last album(专辑) called Shangrila. And this album combines the music of minorities, in China, in Tibet, and in Mongolia. It’s beautiful and original to Chinese culture. And this new album called Heroes of Earth combines Peking Opera and Quen-chu(京剧和昆曲), which are thousand-year-old traditions also unique to Chinese culture. Very unique instruments, costumes, singing styles. I don’t think anyone has ever done this before in the hip hop world.
54.___________________
WL: Um, just the large quantity of work that I have to come up with. I produce for other artists and compose for them as well. And there are a lot of changes in music going on right now in Asia. And it’s really exciting so I decided that I’m going to need a studio in New York. I’m going to need a studio in Taipei. And maybe the rest I can get by with just my laptop. 55. ___________________
WL: Well, I started doing musical theatre. And I loved it so much from the age of 13, you know. Actually in 2000, I did my first movie and ever since then I’ve been enjoying doing movies. I don’t think I’m much of an actor. But I just love being surrounded by creative people and a lot of times doing music is a lonely struggle, especially composing, and arranging, producing my own albums. Acting, every day you get called and you’re surrounded by other actors and creative people.
56.___________________
WL: The first time I won, like you just said, when I was 22, it meant a lot to me. It was like…I didn’t know I could make this happen. I didn’t know I could get this kind of recognition. So back then, it was huge increase of confidence. And I don’t want to say vanity(虚荣心), but confidence. I think every artist needs confidence.