Rachek Carson was born in 1907 in Springsdale, Pennsylvania. She studied biology in college and zoology at Johns Hopkins University, where she received her master’s degree in 1933. In 1936, she was hired by the US Fish and Wildlife Service, where she worked most of her life.
Carson’s first book, Under the Sea Wind, was published in 1941. It received excellent reviews, but sales were poor until it was reissued in 1952. In that year, she published The Sea Around US, which provided a fascinating look beneath the ocean’s surface, emphasizing human history as well as geology and marine biology. Her imagery and language had a poetic quality. Carson consulted no less than 1, 000 printed sources. She had voluminous correspondence and frequent discussions with experts in the field. However, she always realized the limitations of her non-technical readers.
In 1962, Carson published Silence Spring, a book that sparked considerable controversy. It proved how much harm was done by the uncontrolled, reckless use of insecticides. She detailed how they poison the food supply of animals, kill birds, and contaminate human food. At that time, spokesmen for the chemical industry mounted personal attacks against Carson and issued propaganda to indicate that her findings were flawed. However, her work vindicated a 1963 report of the President’s Science Advisory Committee.
According to the passage, Silent Spring is primarily ________.
A. a discussion of hazards insects pose to the food supply
B. an illustration of the benefits of the chemical in dustry
C. a warning about the dangers of misusing insecticides
D. an attack on the use of chemical preservatives in food
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Đáp án C.
Key words: Silent Spring, primarily.
Clues: “In 1962, Carson published Silence Spring, a book that sparked considerable controversy. It proved how much harm was done by the uncontrolled, reckless use of insecticides. She detailed how they poison the food supply of animals, kill birds, and contaminate human food”. Năm 1962, Carson xuất bản Silence Spring, một cuốn sách gây tranh cãi đáng kể. Nó đã chứng minh mức độ tổn hại gây ra bởi việc sử dụng thuốc trừ sâu không kiểm soát, liều lĩnh. Cô đã tiết lộ chi tiết về cách thức họ làm cho thức ăn cho động vật bị nhiễm độc, giết chim và làm ô nhiễm thực phẩm của con người như thế nào.
Vậy đáp an là C. a warning about the dangers of misusing insecticides. Cuốn Slient Spring chủ yếu là một lời cảnh báo về việc sử dụng thuốc trừ sâu sai cách.
Animation traditionally in done by hand-drawing or painting successive frame of an object, each slightly different than the proceeding frame. In computer animation, although the computer may be the one to draw the different frames, in most cases the artist will draw the beginning and ending frames and the computer will produce the drawings between the first and the last drawing. This is generally referred to as computer-assisted animation, because the computer is more of a helper than an originator.
In full computer animation, complex mathematical formulas are used to produce the final sequences of pictures. These formulas operate on extensive databases of numbers that defines the objects in the pictures as they exist in mathematical space. The database consists of endpoints, and color and intensity information. Highly trained professionals are needed to produce such effects because animation that obtains high degrees of realism involves computer techniques from three-dimensional transfofmation, shading, nad curvatures.
High-tech computer animation for film involves very expensive computer systems along with special color terminals or frame buffers. The frame buffer is nothing more than a giant image memory for viewing a single frame. It temporarily holds the image for display on the screen.
A camera can be used to film directly from the computer’s display screen, but for the highest quality images possible, expensive film recorders are used. The computer computer the positions and colors for the figures in the picture, and sends this information to the recorder, which captures it in film. Sometimes, however, the images are stored on a large magnetic disk before being sent to the recorder. Once this process is completed, it is replaced for the next frame. When the entire sequence has been recorded on the film, the film must be developed before the animation can be viewed. If the entire sequence dose not seem right, the motions must be corrected, recomputer, redisplayed, and rerecorded. This approach can be very expensive and time – consuming. Often, computer-animation companies first do motion tests with simple computer-generated line drawings before selling their computers to the task of calculating the high-resolution, realistic-looking images.
According to the passage, how do computer-animation companies often test motion?
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
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Mrs. Wheaton is shopping in Trang Tien Plaza. She is talking to a salesgirl.
Mrs. Wheaton: “Can I have a look at that pullover, please?”
Salesgirl: “________”.
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in the each of the following questions.
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Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in the each of the following questions.
MPs have urged the UK government to launch a major publicity campaign to help people protect themselves against online crime.
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
c
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Luca is at Noi Bai Airport. She wants to exchange some money, she is talking to Paula – a clerk at a currency exchange kiosk.
Luca: “I’d like to change some money.”
Paula: “________”
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He failed to enter college for two consecutive years. He was finally able to attend FPT Arena University.
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in the each of the following questions.
Little House on the Prairie, a successful televion program, was adapted from a series of book by a woman whose life was similar to that of the character called by name Laura.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
This statue is a lifelike ________ of Christ Jesus.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
We intend to ________ with the old system as soon as we have developed a better one.
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
It was wrong of you to criticize your son before his friends left.
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
The number of accidents has gone down steadily since the speed limit was inposed.
