Câu hỏi:
24/06/2023 575
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.
All the following are mentioned as possible factors in drawing insects to weakened trees EXCEPT______.
Đáp án chính xác
Câu hỏi trong đề:
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Trả lời:
Giải bởi Vietjack
Chọn đáp án C.
Giải thích: Dựa vào các ý được đưa ra trong bài.
Dịch: thay đổi màu sắc
Câu hỏi cùng đoạn
Câu 2:
It can be inferred from the passage that research concerning the distress signals of trees______.
It can be inferred from the passage that research concerning the distress signals of trees______.
Đáp án chính xác
Lời giải của GV VietJack
Chọn đáp án D.
Giải thích: Dựa vào các nghiên cứu được đề ra trong bài.
Dịch: Có thể suy ra từ đoạn văn rằng nghiên cứu liên quan đến các tín hiệu gặp nạn của cây cối đang được tiếp tục.Câu 3:
Which of the following could be considered a cause of the distress signals of trees?
Which of the following could be considered a cause of the distress signals of trees?
Đáp án chính xác
Lời giải của GV VietJack
Chọn đáp án D.
Giải thích: Dựa vào câu “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.”
Dịch: Các nhà khoa học cho rằng sự rung chuyển được tạo ra khi các cột nước bên trong các ống chạy dọc theo chiều dài của cây bị vỡ, do có quá ít nước trong cây.
Câu 4:
Which of the following is the main topic of the passage?
Which of the following is the main topic of the passage?
Đáp án chính xác
Lời giải của GV VietJack
Chọn đáp án D.
Giải thích: Dựa vào câu “It’s a sound you will probably never hear, a sickened tree sending out a distress signal.”
Dịch: “Đó là âm thanh mà bạn có thể sẽ không bao giờ nghe thấy, một cái cây ốm yếu phát ra tín hiệu đau đớn.”
Nhà sách VIETJACK:
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