Câu hỏi:
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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood. The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them. These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood. The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them. These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
Question: All the following are mentioned as possible factors in drawing insects to weakened trees EXCEPT______.
Câu hỏi trong đề: Top 5 Đề thi giữa kì 2 Tiếng Anh 12 có đáp án !!
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Trả lời:
Giải bởi Vietjack
Đáp án C.
Câu hỏi cùng đoạn
Câu 2:
Question: It can be inferred from the passage that research concerning the distress signals of trees______.
Lời giải của GV VietJack
Đáp án D.
Câu 3:
Question: It can be inferred from the passage that research concerning the distress signals of trees______.Which of the following could be considered a cause of the distress signals of trees?
Lời giải của GV VietJack
Đáp án D.
Câu 4:
Question: Which of the following is the main topic of the passage?
Lời giải của GV VietJack
Đáp án D.
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CÂU HỎI HOT CÙNG CHỦ ĐỀ
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Question: Which of the following is NOT true about Facebook users in UK?
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Question: Which of the following is the main topic of the passage?
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Câu 3:
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.
Most educational specialists believe that early schooling should provide children with an (27)_____ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28)______ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ______ the method in the United States, where today there are over 400 Montessori schools.
The method helps children learn for themselves by (30) ______ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31)______ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art.
Question 29:
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Câu 4:
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.
Most educational specialists believe that early schooling should provide children with an (27)_____ of their own abilities and the self-confidence to use their abilities. One approach recognised by many (28)______ as promoting these qualities is the Montessori method, first practised by Maria Montessori of Italy in the early 1900s. Nancy McCormick Rambusch is credited with (29) ______ the method in the United States, where today there are over 400 Montessori schools.
The method helps children learn for themselves by (30) ______ them with instructional materials and tasks that facilitate acts of discovery and manipulation. Through such exploration, children develop their sense of touch and learn (31)______ to do everyday tasks without adult assistance. Other benefits include improvement in language skills, and acquaintance with elements of science, music, and art.
Question 28:
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Câu 5:
Mark the letter A, B, C or D on your answer sheet to indicate the most suitable respone to complete each of the following exchanges.
Ann: “Passing a university entrance exam is not difficult.” - John: “_____.”
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Question: Which of the following is NOT the thing Bethan does as a Facebook addict?
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